The commit 5e16bbc2fb ("sched: Streamline the task migration locking
a little") hardened task migration locking and now __migrate_task() is
called after rq lock held. Move out notification out of spinlock.
Change-Id: I553adcfe80d5c670f4ddf83438226fd5e0924fe8
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Fix various compilation failures when CONFIG_SCHED_HMP or
CONFIG_SCHED_INPUT isn't enabled.
Change-Id: I385dd37cfd778919f54f606bc13bebedd2fb5b9e
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Biasing sync wakee task towards waker CPU's cluster makes sense when the
waker's demand is high enough so the wakee also can take advantage
of high CPU frequency voted because of waker's load. Placing sync wakee
on the low demand waker's CPU can lead placement imbalance which can
lead unnecessary migration.
Introduce a new tunable "sched_big_waker_task_load" that defines the big
waker so scheduler avoid wakee on waker's cluster bias when the waker's
load is below the tunable.
CRs-fixed: 971295
Change-Id: I1550ede0a71ac8c9be74a7daabe164c6a269a3fb
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
[joonwoop@codeaurora.org: fixed a minor conflict in
include/linux/sched/sysctl.h.]
If sync wakee task's demand is small it's worth to place the wakee task
on waker's cluster for better performance in the sense that waker and
wakee are corelated so the wakee should take advantage of waker cluster's
frequency which is voted by the waker along with cache locality benefit.
While biasing towards the waker's cluster we want to avoid the waker CPU
as much as possible as placing the wakee on the waker's CPU can make the
waker got preempted and migrated by load balancer.
Introduce a new tunable 'sched_small_wakee_task_load' that differentiates
eligible small wakee task and place the small wakee tasks on the waker's
cluster.
CRs-fixed: 971295
Change-Id: I96897d9a72a6f63dca4986d9219c2058cd5a7916
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
[joonwoop@codeaurora.org: fixed a minor conflict in
include/linux/sched/sysctl.h.]
p->grp is being accessed outside of lock which can cause null-pointer
dereference. Fix this and also add rcu critical section around access
of this data structure.
CRs-fixed: 985379
Change-Id: Ic82de6ae2821845d704f0ec18046cc6a24f98e39
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[joonwoop@codeaurora.org: fixed conflict in init_new_task_load().]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
At present sched_select_prev_cpu_us tunable is restricted to values
below 100us. Fix this unintended restriction.
CRs-Fixed: 972237
Change-Id: I5eaf9f40468805c396328ca1022baef32acf8de0
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
The idle task's mark_start can get updated even without the CPU being
online. Hence the mark_start is restored when the CPU is coming online.
The idle task's mark_start is reset in init_idle()->__sched_fork()->
init_new_task_load(). The original mark_start is saved and restored
later. This can be avoided by moving init_new_task_load() to
wake_up_new_task(), which never gets called for an idle task.
We only care about idle task's ravg.mark_start and not initializing
the other fields of ravg struct will not have any side effects.
This clean up allows the subsequent patches to drop the rq->lock
while calling __sched_fork() in init_idle().
CRs-Fixed: 965873
Change-Id: I41de6d69944d7d44b9c4d11b2d97ad01bd8fe96d
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
[joonwoop@codeaurora.org: fixed a minor conflict in core.c. omitted
changes for CONFIG_SCHED_QHMP.]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
When sched_restrict_cluster_spill knob is enabled, RT tasks are restricted
to lower power cluster. This knob also restricts inter cluster no-hz kicks.
Ignore this knob setting when sched_boost is enabled so that tasks are
placed on CPUs with highest spare capacity.
CRs-Fixed: 968852
Change-Id: I01b3fc10b39dc834a733d64c2ee29c308d7ff730
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Current window based load tracking only saves history for five
windows. A historically heavy task's heavy load will be completely
forgotten after five windows of light load. Even before the five
window expires, a heavy task wakes up on same CPU it used to run won't
trigger any frequency change until end of the window. It would starve
for the entire window. It also adds one "small" load window to
history because it's accumulating load at a low frequency, further
reducing the tracked load for this heavy task.
Ideally, scheduler should be able to identify such tasks and notify
governor to increase frequency immediately after it wakes up.
Add a histogram for each task to track a much longer load history. A
prediction will be made based on runtime of previous or current
window, histogram data and load tracked in recent windows. Prediction
of all tasks that is currently running or runnable on a CPU is
aggregated and reported to CPUFreq governor in sched_get_cpus_busy().
sched_get_cpus_busy() now returns predicted busy time in addition
to previous window busy time and new task busy time, scaled to
the CPU maximum possible frequency.
Tunables:
- /proc/sys/kernel/sched_gov_alert_freq (KHz)
This tunable can be used to further filter the notifications.
Frequency alert notification is sent only when the predicted
load exceeds previous window load by sched_gov_alert_freq converted to
load.
Change-Id: If29098cd2c5499163ceaff18668639db76ee8504
Suggested-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
[joonwoop@codeaurora.org: fixed merge conflicts around __migrate_task()
and removed changes for CONFIG_SCHED_QHMP.]
Each time a task wakes up, scheduler evaluates its load and notifies
governor if the resulting frequency of destination CPU is larger than
a threshold. However, some governor wakes up a separate task that
handles frequency change, which again calls wake_up_process().
This is dangerous because if the task being woken up meets the
threshold and ends up being moved around, there is a potential for
endless recursive notifications.
Introduce a new API for waking up a task without triggering
frequency notification.
Change-Id: I24261af81b7dc410c7fb01eaa90920b8d66fbd2a
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
If the tasks are run on the higher capacity cluster solely due to the
reason that they can not be be fit in the lower capacity cluster, the
downmigrate threshold prevents the frequent tasks migrations between
the clusters.
Change-Id: I234a23ffd907c2476c94d5f6227dab1bb6c9bebb
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
The current CPU selection algorithm for RT tasks looks for the
least loaded CPU in all clusters. Stop the search at the lowest
possible power cluster based on "sched_restrict_cluster_spill"
sysctl tunable.
Change-Id: I34fdaefea56e0d1b7e7178d800f1bb86aa0ec01c
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
The select_best_cpu() algorithm iterates over all the clusters and
selects the most power efficient CPU that satisfies the task needs.
During the search, skip the next cluster if its minimum power cost
is higher than the power cost of an eligible CPU found in the previous
cluster.
In a b.L system, if the BIG cluster minimum power cost is higher than
the maximum power cost of the little cluster, this optimization avoids
searching the BIG cluster if an eligible CPU is found in the little
cluster.
Change-Id: I5e3755f107edb6c72180edbec2a658be931c276d
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
The frequency based inter cluster load balance restrictions are not
reliable as frequency does not provide a good estimate of the CPU's
current load. Replace them with the spill_load and spill_nr_run
based checks.
The higher capacity cluster is restricted from pulling the tasks from
the lower capacity cluster unless all of the lower capacity CPUs are
above spill. This behavior can be controlled by a sysctl tunable and
it is disabled by default (i.e. no load balance restrictions).
Change-Id: I45c09c8adcb61a8a7d4e08beadf2f97f1805fb42
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
[joonwoop@codeaurora.org: fixed merge conflicts due to omitted changes
for CONFIG_SCHED_QHMP.]
Provide userspace interface for tasks to be grouped together as
"related" threads. For example, all threads involved in updating
display buffer could be tagged as related.
Scheduler will attempt to provide special treatment for group of
related threads such as:
1) Colocation of related threads in same "preferred" cluster
2) Aggregation of demand towards determination of cluster frequency
This patch extends scheduler to provide best-effort colocation support
for a group of related threads.
Change-Id: Ic2cd769faf5da4d03a8f3cb0ada6224d0101a5f5
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
[joonwoop@codeaurora.org: fixed minor merge conflicts. removed ifdefry
for CONFIG_SCHED_QHMP.]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Make use of clusters in the fair and rt scheduling classes. This is
needed as the freq domain mask can no longer be used to do correct
task placement. The freq domain mask was being used to demarcate
clusters.
Change-Id: I57f74147c7006f22d6760256926c10fd0bf50cbd
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
[joonwoop@codeaurora.org: fixed merge conflicts due to omitted changes
for CONFIG_SCHED_QHMP.]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
A cluster is set of CPUs sharing some power controls and an L2 cache.
This patch buids a list of clusters at bootup which are sorted by
their max_power_cost. Many cluster-shared attributes like cur_freq,
max_freq etc are needlessly maintained in per-cpu 'struct rq' currently.
Consolidate them in a cluster structure.
Change-Id: I0567672ad5fb67d211d9336181ceb53b9f6023af
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
[joonwoop@codeaurora.org: fixed minor conflict in
arch/arm64/kernel/topology.c. fixed conflict due to ommited changes for
CONFIG_SCHED_QHMP.]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
This change fixes below compilation warning on Kernel 4.4.
watchdog.c:122:22: warning: 'hardlockup_allcpu_dumped' \
defined but not used [-Wunused-variable]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Export sched_setscheduler_nocheck() so that external kernel modules
can use it.
Change-Id: Ib50f537f5aef50c365ba63fb8ffce05bc1c7c431
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
lpm-level headers required only when CONFIG_MSM_PM is set.
To compile msm kernel for other targets (arch=um), add config
check to include lpm levels.
Change-Id: Ia1bd51da4952e56b945a5e51a3b1ff8aaa643cd5
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
Currently, RTC_ALARM is used to wake-up target from
suspend state and is also used for power-off alarm
feature. This patch uses qtimer to wake-up from
suspend state.
Change-Id: Ia42cfecd573309be2f03c18b4f1c321be8202d7d
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>
Currently kmemleak scans module memory as provided
in the area list. This takes up lot of time with
irq's and preemption disabled. Provide a compile
time configurable config to enable this functionality.
Change-Id: I5117705e7e6726acdf492e7f87c0703bc1f28da0
Signed-off-by: Vignesh Radhakrishnan <vigneshr@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
[satyap: trivial merge conflict resolution and remove duplicate entry]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Kmemleak reports the following memory leak :
[<ffffffc0002faef8>] create_object+0x140/0x274
[<ffffffc000cc3598>] kmemleak_alloc+0x80/0xbc
[<ffffffc0002f707c>] kmem_cache_alloc_trace+0x148/0x1d8
[<ffffffc00024504c>] __smpboot_create_thread.part.2+0x2c/0xec
[<ffffffc0002452b4>] smpboot_register_percpu_thread+0x90/0x118
[<ffffffc0016067c0>] spawn_ksoftirqd+0x1c/0x30
[<ffffffc000200824>] do_one_initcall+0xb0/0x14c
[<ffffffc001600820>] kernel_init_freeable+0x84/0x1e0
[<ffffffc000cc273c>] kernel_init+0x10/0xcc
[<ffffffc000203bbc>] ret_from_fork+0xc/0x50
This memory allocated here points to smpboot_thread_data.
Data is used as an argument for this kthread.
This will be used when smpboot_thread_fn runs. Therefore,
is not a leak.
Call kmemleak_not_leak for smpboot_thread_data pointer
to ensure that kmemleak doesn't report it as a memory
leak.
Change-Id: I02b0a7debea3907b606856e069d63d7991b67cd9
Signed-off-by: Vignesh Radhakrishnan <vigneshr@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Currently the vmstat updater is not deferrable as a result of commit
ba4877b9ca ("vmstat: do not use deferrable delayed work for
vmstat_update"). This in turn can cause multiple interruptions of the
applications because the vmstat updater may run at
Make vmstate_update deferrable again and provide a function that folds
the differentials when the processor is going to idle mode thus
addressing the issue of the above commit in a clean way.
Note that the shepherd thread will continue scanning the differentials
from another processor and will reenable the vmstat workers if it
detects any changes.
Change-Id: Idf256cfacb40b4dc8dbb6795cf06b34e8fec7a06
Fixes: ba4877b9ca ("vmstat: do not use deferrable delayed work for vmstat_update")
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Git-commit: 0eb77e9880321915322d42913c3b53241739c8aa
[shashim@codeaurora.org: resolve minor merge conflicts]
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>
[satyap: resolve trivial merge conflicts]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
For CONFIG_KALLSYMS, we keep two symbol tables and two string tables.
There's one full copy, marked SHF_ALLOC and laid out at the end of the
module's init section. There's also a cut-down version that only
contains core symbols and strings, and lives in the module's core
section.
After module init (and before we free the module memory), we switch
the mod->symtab, mod->num_symtab and mod->strtab to point to the core
versions. We do this under the module_mutex.
However, kallsyms doesn't take the module_mutex: it uses
preempt_disable() and rcu tricks to walk through the modules, because
it's used in the oops path. It's also used in /proc/kallsyms.
There's nothing atomic about the change of these variables, so we can
get the old (larger!) num_symtab and the new symtab pointer; in fact
this is what I saw when trying to reproduce.
By grouping these variables together, we can use a
carefully-dereferenced pointer to ensure we always get one or the
other (the free of the module init section is already done in an RCU
callback, so that's safe). We allocate the init one at the end of the
module init section, and keep the core one inside the struct module
itself (it could also have been allocated at the end of the module
core, but that's probably overkill).
CRs-Fixed: 982779
Change-Id: I519f081967785e44a6ea33b16b1da64b14979963
Reported-by: Weilong Chen <chenweilong@huawei.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=111541
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Git-commit: 8244062ef1e54502ef55f54cced659913f244c3e
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[salvares@codeaurora.org: resolved context conflicts in module.c]
Signed-off-by: Sanrio Alvares <salvares@codeaurora.org>
Add support to receive a static ratio from userspace to
divide the swap pages between ZRAM and disk based swap
devices. The existing infrastructure allows to keep
same priority for multiple swap devices, which results
in round robin distribution of pages. With this patch,
the ratio can be defined.
CRs-fixed: 968416
Change-Id: I54f54489db84cabb206569dd62d61a8a7a898991
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
cpu3 stuck in printk more time in spin lock low_water_lock cause cpu0
get spin lock fail and system crashed.
CRs-Fixed: 521570
Change-Id: I75356a4b4171ae2888ce6cce792f569b5ca8cdcf
Signed-off-by: Tingting Yang <tingting@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
When a qos request is added with IRQ affinity, irq notifier
for that irq is added and with out disabling the irq
notifier if the irq is free it is through a warning.
So disable irq notifier when the qos request is removed.
Change-Id: I50faa4ecbe1b632c0f0f203ca52faf18753c33d4
Signed-off-by: Srinivas Rao L <lsrao@codeaurora.org>
The current maximum length of an IPC Logging log context name is 20
characters. Some clients are now using names longer than this.
Increase the maximum length to 32. This change increases the IPC Logging
version to 3.
Change-Id: I9daecb8a7c6c3aea427efd1c75e307456e9c6c21
Signed-off-by: Steven Cahail <scahail@codeaurora.org>
IPC Logging currently creates debugfs directories for each of its
logging contexts, but does not remove them when destroying the contexts.
If a user attempts to access a directory associated with a destroyed
context, a crash will result.
Destroy debugfs directories when the logging context is destroyed.
Change-Id: I5a3b1cbf2fb5d9d0ede3d9da0fccd605b9fdf619
Signed-off-by: Steven Cahail <scahail@codeaurora.org>
It is possible that 'root' variable is used uninitialized. This
change avoids usage of uninitialized usage of the variable.
Change-Id: I9a3bd941a23736cb003f209cf6dde84fd859e9e6
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
Add all cpu notifiers in CONSOLE_FLUSH_ON_HOTPLUG config
flag to avoid hotplug latencies and by default config
CONSOLE_FLUSH_ON_HOTPLUG flag is disabled.
Change-Id: I389f207d8faf84cfd4267d52213e40a47a43774d
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
When a deferrable work (INIT_DEFERRABLE_WORK, etc.) is queued via
queue_delayed_work() it's probably intended to run the work item on any
CPU that isn't idle. However, we queue the work to run at a later time
by starting a deferrable timer that binds to whatever CPU the work is
queued on which is same with queue_delayed_work_on(smp_processor_id())
effectively.
As a result WORK_CPU_UNBOUND work items aren't really cpu unbound now.
In fact this is perfectly fine with UP kernel and also won't affect much a
system without dyntick with SMP kernel too as every cpus run timers
periodically. But on SMP systems with dyntick current implementation leads
deferrable timers not very scalable because the timer's base which has
queued the deferrable timer won't wake up till next non-deferrable timer
expires even though there are possible other non idle cpus are running
which are able to run expired deferrable timers.
The deferrable work is a good example of the current implementation's
victim like below.
INIT_DEFERRABLE_WORK(&dwork, fn);
CPU 0 CPU 1
queue_delayed_work(wq, &dwork, HZ);
queue_delayed_work_on(WORK_CPU_UNBOUND);
...
__mod_timer() -> queues timer to the
current cpu's timer
base.
...
tick_nohz_idle_enter() -> cpu enters idle.
A second later
cpu 0 is now in idle. cpu 1 exits idle or wasn't in idle so
now it's in active but won't
cpu 0 won't wake up till next handle cpu unbound deferrable timer
non-deferrable timer expires. as it's in cpu 0's timer base.
To make all cpu unbound deferrable timers are scalable, introduce a common
timer base which is only for cpu unbound deferrable timers to make those
are indeed cpu unbound so that can be scheduled by tick_do_timer_cpu.
This common timer fixes scalability issue of delayed work and all other cpu
unbound deferrable timer using implementations.
Change-Id: I8b6c57d8b6445a76fa02a8cb598a8ef22aef7200
CC: Thomas Gleixner <tglx@linutronix.de>
CC: John Stultz <john.stultz@linaro.org>
CC: Tejun Heo <tj@kernel.org>
[joonwoop@codeaurora.org: timer->base replaced with CPU index so get
the deferrable timer wheel from lock_timer_base() instead of
do_init_timer().]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
The perf event permission checks are necessary because they introduce
a security concern where one userspace task can monitor another task
and gain security related information. That concern doesn't exist for
kernel owned perf events since the kernel already has access to
everything. So, skip permission checks for kernel owned perf events.
Change-Id: I7121f5e03cf6ce8f0bfc9b5a69488efb80a97051
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
[satyap: trivial merge conflict resolution]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
An incorrect pointer to the event was being passed, instead of
pointer to the remove event struct. Pass the correct pointer.
Change-Id: I7c35c5bb3a14d74a9b36c3d1dbd7af0bf80e7efe
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
It is sometimes useful to profile how long CPU frequency switches
take, and traces have already been added for this purpose. Make
use of these and the trace_stat framework to generate statistical
histograms of frequency switch times in the following format:
# cat /sys/kernel/debug/tracing/trace_stat/cpu_freq_switch
CPU START_KHZ END_KHZ COUNT AVG_US MIN_US MAX_US
| | | | | | |
0 384000 1512000 3 2787 1648 3418
0 486000 384000 1 1129 1129 1129
0 1458000 384000 1 3174 3174 3174
0 1512000 384000 1 3265 3265 3265
0 1512000 486000 1 3235 3235 3235
0 1512000 1458000 1 213 213 213
0 1512000 1512000 1 0 0 0
Profiling is disabled by default (since it does incur some
overhead). It can be enabled or re-disabled echoing 1 or 0
to /sys/kernel/debug/tracing/cpu_freq_switch_profile_enabled
Change-Id: I3ef7f9d681b7bd13bcaa031003b10312afe1aefe
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
* lsk-44/linux-linaro-lsk-v4.4:
Linux 4.4.3
modules: fix modparam async_probe request
module: wrapper for symbol name.
itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper
posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper
timerfd: Handle relative timers with CONFIG_TIME_LOW_RES proper
prctl: take mmap sem for writing to protect against others
xfs: log mount failures don't wait for buffers to be released
Revert "xfs: clear PF_NOFREEZE for xfsaild kthread"
xfs: inode recovery readahead can race with inode buffer creation
libxfs: pack the agfl header structure so XFS_AGFL_SIZE is correct
ovl: setattr: check permissions before copy-up
ovl: root: copy attr
ovl: check dentry positiveness in ovl_cleanup_whiteouts()
ovl: use a minimal buffer in ovl_copy_xattr
ovl: allow zero size xattr
futex: Drop refcount if requeue_pi() acquired the rtmutex
devm_memremap_release(): fix memremap'd addr handling
ipc/shm: handle removed segments gracefully in shm_mmap()
intel_scu_ipcutil: underflow in scu_reg_access()
mm,thp: khugepaged: call pte flush at the time of collapse
dump_stack: avoid potential deadlocks
radix-tree: fix oops after radix_tree_iter_retry
drivers/hwspinlock: fix race between radix tree insertion and lookup
radix-tree: fix race in gang lookup
MAINTAINERS: return arch/sh to maintained state, with new maintainers
memcg: only free spare array when readers are done
numa: fix /proc/<pid>/numa_maps for hugetlbfs on s390
fs/hugetlbfs/inode.c: fix bugs in hugetlb_vmtruncate_list()
scripts/bloat-o-meter: fix python3 syntax error
dma-debug: switch check from _text to _stext
m32r: fix m32104ut_defconfig build fail
xhci: Fix list corruption in urb dequeue at host removal
Revert "xhci: don't finish a TD if we get a short-transfer event mid TD"
iommu/vt-d: Clear PPR bit to ensure we get more page request interrupts
iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG
iommu/vt-d: Fix mm refcounting to hold mm_count not mm_users
iommu/amd: Correct the wrong setting of alias DTE in do_attach
iommu/vt-d: Don't skip PCI devices when disabling IOTLB
Input: vmmouse - fix absolute device registration
string_helpers: fix precision loss for some inputs
Input: i8042 - add Fujitsu Lifebook U745 to the nomux list
Input: elantech - mark protocols v2 and v3 as semi-mt
mm: fix regression in remap_file_pages() emulation
mm: replace vma_lock_anon_vma with anon_vma_lock_read/write
mm: fix mlock accouting
libnvdimm: fix namespace object confusion in is_uuid_busy()
mm: soft-offline: check return value in second __get_any_page() call
perf kvm record/report: 'unprocessable sample' error while recording/reporting guest data
KVM: PPC: Fix ONE_REG AltiVec support
KVM: PPC: Fix emulation of H_SET_DABR/X on POWER8
KVM: arm/arm64: Fix reference to uninitialised VGIC
arm64: dma-mapping: fix handling of devices registered before arch_initcall
ARM: OMAP2+: Fix ppa_zero_params and ppa_por_params for rodata
ARM: OMAP2+: Fix save_secure_ram_context for rodata
ARM: OMAP2+: Fix l2dis_3630 for rodata
ARM: OMAP2+: Fix l2_inv_api_params for rodata
ARM: OMAP2+: Fix wait_dll_lock_timed for rodata
ARM: dts: at91: sama5d4ek: add phy address and IRQ for macb0
ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type
ARM: dts: at91: sama5d4: fix instance id of DBGU
ARM: dts: at91: sama5d4 xplained: properly mux phy interrupt
ARM: dts: omap5-board-common: enable rtc and charging of backup battery
ARM: dts: Fix omap5 PMIC control lines for RTC writes
ARM: dts: Fix wl12xx missing clocks that cause hangs
ARM: nomadik: fix up SD/MMC DT settings
ARM: 8517/1: ICST: avoid arithmetic overflow in icst_hz()
ARM: 8519/1: ICST: try other dividends than 1
arm64: mm: avoid calling apply_to_page_range on empty range
ARM: mvebu: remove duplicated regulator definition in Armada 388 GP
powerpc/ioda: Set "read" permission when "write" is set
powerpc/powernv: Fix stale PE primary bus
powerpc/eeh: Fix stale cached primary bus
powerpc/eeh: Fix PE location code
SUNRPC: Fixup socket wait for memory
udf: Check output buffer length when converting name to CS0
udf: Prevent buffer overrun with multi-byte characters
udf: limit the maximum number of indirect extents in a row
pNFS/flexfiles: Fix an XDR encoding bug in layoutreturn
nfs: Fix race in __update_open_stateid()
pNFS/flexfiles: Fix an Oopsable typo in ff_mirror_match_fh()
NFS: Fix attribute cache revalidation
cifs: fix erroneous return value
cifs_dbg() outputs an uninitialized buffer in cifs_readdir()
cifs: fix race between call_async() and reconnect()
cifs: Ratelimit kernel log messages
iio: inkern: fix a NULL dereference on error
iio: pressure: mpl115: fix temperature offset sign
iio: light: acpi-als: Report data as processed
iio: dac: mcp4725: set iio name property in sysfs
iio: add IIO_TRIGGER dependency to STK8BA50
iio: add HAS_IOMEM dependency to VF610_ADC
iio-light: Use a signed return type for ltr501_match_samp_freq()
iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer.
iio: adis_buffer: Fix out-of-bounds memory access
scsi: fix soft lockup in scsi_remove_target() on module removal
SCSI: Add Marvell Console to VPD blacklist
scsi_dh_rdac: always retry MODE SELECT on command lock violation
drivers/scsi/sg.c: mark VMA as VM_IO to prevent migration
SCSI: fix crashes in sd and sr runtime PM
iscsi-target: Fix potential dead-lock during node acl delete
scsi: add Synology to 1024 sector blacklist
klist: fix starting point removed bug in klist iterators
tracepoints: Do not trace when cpu is offline
tracing: Fix freak link error caused by branch tracer
perf tools: tracepoint_error() can receive e=NULL, robustify it
tools lib traceevent: Fix output of %llu for 64 bit values read on 32 bit machines
ptrace: use fsuid, fsgid, effective creds for fs access checks
Btrfs: fix direct IO requests not reporting IO error to user space
Btrfs: fix hang on extent buffer lock caused by the inode_paths ioctl
Btrfs: fix page reading in extent_same ioctl leading to csum errors
Btrfs: fix invalid page accesses in extent_same (dedup) ioctl
btrfs: properly set the termination value of ctx->pos in readdir
Revert "btrfs: clear PF_NOFREEZE in cleaner_kthread()"
Btrfs: fix fitrim discarding device area reserved for boot loader's use
btrfs: handle invalid num_stripes in sys_array
ext4: don't read blocks from disk after extents being swapped
ext4: fix potential integer overflow
ext4: fix scheduling in atomic on group checksum failure
serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)
serial: 8250_pci: Add Intel Broadwell ports
tty: Add support for PCIe WCH382 2S multi-IO card
pty: make sure super_block is still valid in final /dev/tty close
pty: fix possible use after free of tty->driver_data
staging/speakup: Use tty_ldisc_ref() for paste kworker
phy: twl4030-usb: Fix unbalanced pm_runtime_enable on module reload
phy: twl4030-usb: Relase usb phy on unload
ALSA: seq: Fix double port list deletion
ALSA: seq: Fix leak of pool buffer at concurrent writes
ALSA: pcm: Fix rwsem deadlock for non-atomic PCM stream
ALSA: hda - Cancel probe work instead of flush at remove
x86/mm: Fix vmalloc_fault() to handle large pages properly
x86/uaccess/64: Handle the caching of 4-byte nocache copies properly in __copy_user_nocache()
x86/uaccess/64: Make the __copy_user_nocache() assembly code more readable
x86/mm/pat: Avoid truncation when converting cpa->numpages to address
x86/mm: Fix types used in pgprot cacheability flags translations
Linux 4.4.2
HID: multitouch: fix input mode switching on some Elan panels
mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress
zsmalloc: fix migrate_zspage-zs_free race condition
zram: don't call idr_remove() from zram_remove()
zram: try vmalloc() after kmalloc()
zram/zcomp: use GFP_NOIO to allocate streams
rtlwifi: rtl8821ae: Fix 5G failure when EEPROM is incorrectly encoded
rtlwifi: rtl8821ae: Fix errors in parameter initialization
crypto: marvell/cesa - fix test in mv_cesa_dev_dma_init()
crypto: atmel-sha - remove calls of clk_prepare() from atomic contexts
crypto: atmel-sha - fix atmel_sha_remove()
crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path
crypto: algif_skcipher - Do not dereference ctx without socket lock
crypto: algif_skcipher - Do not assume that req is unchanged
crypto: user - lock crypto_alg_list on alg dump
EVM: Use crypto_memneq() for digest comparisons
crypto: algif_hash - wait for crypto_ahash_init() to complete
crypto: shash - Fix has_key setting
crypto: chacha20-ssse3 - Align stack pointer to 64 bytes
crypto: caam - make write transactions bufferable on PPC platforms
crypto: algif_skcipher - sendmsg SG marking is off by one
crypto: algif_skcipher - Load TX SG list after waiting
crypto: crc32c - Fix crc32c soft dependency
crypto: algif_skcipher - Fix race condition in skcipher_check_key
crypto: algif_hash - Fix race condition in hash_check_key
crypto: af_alg - Forbid bind(2) when nokey child sockets are present
crypto: algif_skcipher - Remove custom release parent function
crypto: algif_hash - Remove custom release parent function
crypto: af_alg - Allow af_af_alg_release_parent to be called on nokey path
ahci: Intel DNV device IDs SATA
libata: disable forced PORTS_IMPL for >= AHCI 1.3
crypto: algif_skcipher - Add key check exception for cipher_null
crypto: skcipher - Add crypto_skcipher_has_setkey
crypto: algif_hash - Require setkey before accept(2)
crypto: hash - Add crypto_ahash_has_setkey
crypto: algif_skcipher - Add nokey compatibility path
crypto: af_alg - Add nokey compatibility path
crypto: af_alg - Fix socket double-free when accept fails
crypto: af_alg - Disallow bind/setkey/... after accept(2)
crypto: algif_skcipher - Require setkey before accept(2)
sched: Fix crash in sched_init_numa()
ext4 crypto: add missing locking for keyring_key access
iommu/io-pgtable-arm: Ensure we free the final level on teardown
tty: Fix unsafe ldisc reference via ioctl(TIOCGETD)
tty: Retry failed reopen if tty teardown in-progress
tty: Wait interruptibly for tty lock on reopen
n_tty: Fix unsafe reference to "other" ldisc
usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Broxton-M platforms
usb: xhci: handle both SSIC ports in PME stuck quirk
usb: phy: msm: fix error handling in probe.
usb: cdc-acm: send zero packet for intel 7260 modem
usb: cdc-acm: handle unlinked urb in acm read callback
USB: option: fix Cinterion AHxx enumeration
USB: serial: option: Adding support for Telit LE922
USB: cp210x: add ID for IAI USB to RS485 adaptor
USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable
usb: hub: do not clear BOS field during reset device
USB: visor: fix null-deref at probe
USB: serial: visor: fix crash on detecting device without write_urbs
ASoC: rt5645: fix the shift bit of IN1 boost
saa7134-alsa: Only frees registered sound cards
ALSA: dummy: Implement timer backend switching more safely
ALSA: hda - Fix bad dereference of jack object
ALSA: hda - Fix speaker output from VAIO AiO machines
Revert "ALSA: hda - Fix noise on Gigabyte Z170X mobo"
ALSA: hda - Fix static checker warning in patch_hdmi.c
ALSA: hda - Add fixup for Mac Mini 7,1 model
ALSA: timer: Fix race between stop and interrupt
ALSA: timer: Fix wrong instance passed to slave callbacks
ALSA: timer: Fix race at concurrent reads
ALSA: timer: Fix link corruption due to double start or stop
ALSA: timer: Fix leftover link at closing
ALSA: timer: Code cleanup
ALSA: seq: Fix lockdep warnings due to double mutex locks
ALSA: seq: Fix race at closing in virmidi driver
ALSA: seq: Fix yet another races among ALSA timer accesses
ASoC: dpcm: fix the BE state on hw_free
ALSA: pcm: Fix potential deadlock in OSS emulation
ALSA: hda/realtek - Support Dell headset mode for ALC225
ALSA: hda/realtek - Support headset mode for ALC225
ALSA: hda/realtek - New codec support of ALC225
ALSA: rawmidi: Fix race at copying & updating the position
ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check
ALSA: rawmidi: Make snd_rawmidi_transmit() race-free
ALSA: seq: Degrade the error message for too many opens
ALSA: seq: Fix incorrect sanity check at snd_seq_oss_synth_cleanup()
ALSA: dummy: Disable switching timer backend via sysfs
ALSA: compress: Disable GET_CODEC_CAPS ioctl for some architectures
ALSA: hda - disable dynamic clock gating on Broxton before reset
ALSA: Add missing dependency on CONFIG_SND_TIMER
ALSA: bebob: Use a signed return type for get_formation_index
ALSA: usb-audio: avoid freeing umidi object twice
ALSA: usb-audio: Add native DSD support for PS Audio NuWave DAC
ALSA: usb-audio: Fix OPPO HA-1 vendor ID
ALSA: usb-audio: Add quirk for Microsoft LifeCam HD-6000
ALSA: usb-audio: Fix TEAC UD-501/UD-503/NT-503 usb delay
hrtimer: Handle remaining time proper for TIME_LOW_RES
md/raid: only permit hot-add of compatible integrity profiles
media: i2c: Don't export ir-kbd-i2c module alias
parisc: Fix __ARCH_SI_PREAMBLE_SIZE
parisc: Protect huge page pte changes with spinlocks
printk: do cond_resched() between lines while outputting to consoles
tracing/stacktrace: Show entire trace if passed in function not found
tracing: Fix stacktrace skip depth in trace_buffer_unlock_commit_regs()
PCI: Fix minimum allocation address overwrite
PCI: host: Mark PCIe/PCI (MSI) IRQ cascade handlers as IRQF_NO_THREAD
mtd: nand: assign reasonable default name for NAND drivers
wlcore/wl12xx: spi: fix NULL pointer dereference (Oops)
wlcore/wl12xx: spi: fix oops on firmware load
ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup
ocfs2/dlm: ignore cleaning the migration mle that is inuse
ALSA: hda - Implement loopback control switch for Realtek and other codecs
block: fix bio splitting on max sectors
base/platform: Fix platform drivers with no probe callback
HID: usbhid: fix recursive deadlock
ocfs2: NFS hangs in __ocfs2_cluster_lock due to race with ocfs2_unblock_lock
block: split bios to max possible length
NFSv4.1/pnfs: Fixup an lo->plh_block_lgets imbalance in layoutreturn
crypto: sun4i-ss - add missing statesize
Linux 4.4.1
arm64: kernel: fix architected PMU registers unconditional access
arm64: kernel: enforce pmuserenr_el0 initialization and restore
arm64: mm: ensure that the zero page is visible to the page table walker
arm64: Clear out any singlestep state on a ptrace detach operation
powerpc/module: Handle R_PPC64_ENTRY relocations
scripts/recordmcount.pl: support data in text section on powerpc
powerpc: Make {cmp}xchg* and their atomic_ versions fully ordered
powerpc: Make value-returning atomics fully ordered
powerpc/tm: Check for already reclaimed tasks
batman-adv: Drop immediate orig_node free function
batman-adv: Drop immediate batadv_hard_iface free function
batman-adv: Drop immediate neigh_ifinfo free function
batman-adv: Drop immediate batadv_neigh_node free function
batman-adv: Drop immediate batadv_orig_ifinfo free function
batman-adv: Avoid recursive call_rcu for batadv_nc_node
batman-adv: Avoid recursive call_rcu for batadv_bla_claim
team: Replace rcu_read_lock with a mutex in team_vlan_rx_kill_vid
net/mlx5_core: Fix trimming down IRQ number
bridge: fix lockdep addr_list_lock false positive splat
ipv6: update skb->csum when CE mark is propagated
net: bpf: reject invalid shifts
phonet: properly unshare skbs in phonet_rcv()
dwc_eth_qos: Fix dma address for multi-fragment skbs
bonding: Prevent IPv6 link local address on enslaved devices
net: preserve IP control block during GSO segmentation
udp: disallow UFO for sockets with SO_NO_CHECK option
net: pktgen: fix null ptr deref in skb allocation
sched,cls_flower: set key address type when present
tcp_yeah: don't set ssthresh below 2
ipv6: tcp: add rcu locking in tcp_v6_send_synack()
net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory
vxlan: fix test which detect duplicate vxlan iface
unix: properly account for FDs passed over unix sockets
xhci: refuse loading if nousb is used
usb: core: lpm: fix usb3_hardware_lpm sysfs node
USB: cp210x: add ID for ELV Marble Sound Board 1
rtlwifi: fix memory leak for USB device
ASoC: compress: Fix compress device direction check
ASoC: wm5110: Fix PGA clear when disabling DRE
ALSA: timer: Handle disconnection more safely
ALSA: hda - Flush the pending probe work at remove
ALSA: hda - Fix missing module loading with model=generic option
ALSA: hda - Fix bass pin fixup for ASUS N550JX
ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0
ALSA: hrtimer: Fix stall by hrtimer_cancel()
ALSA: pcm: Fix snd_pcm_hw_params struct copy in compat mode
ALSA: seq: Fix snd_seq_call_port_info_ioctl in compat mode
ALSA: hda - Add fixup for Dell Latitidue E6540
ALSA: timer: Fix double unlink of active_list
ALSA: timer: Fix race among timer ioctls
ALSA: hda - fix the headset mic detection problem for a Dell laptop
ALSA: timer: Harden slave timer list handling
ALSA: usb-audio: Fix mixer ctl regression of Native Instrument devices
ALSA: hda - Fix white noise on Dell Latitude E5550
ALSA: seq: Fix race at timer setup and close
ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect
ALSA: seq: Fix missing NULL check at remove_events ioctl
ALSA: hda - Fixup inverted internal mic for Lenovo E50-80
ALSA: usb: Add native DSD support for Oppo HA-1
x86/mm: Improve switch_mm() barrier comments
x86/mm: Add barriers and document switch_mm()-vs-flush synchronization
x86/boot: Double BOOT_HEAP_SIZE to 64KB
x86/reboot/quirks: Add iMac10,1 to pci_reboot_dmi_table[]
kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROL
KVM: x86: correctly print #AC in traces
KVM: x86: expose MSR_TSC_AUX to userspace
x86/xen: don't reset vcpu_info on a cancelled suspend
KEYS: Fix keyring ref leak in join_session_keyring()
Conflicts:
arch/arm64/kernel/perf_event.c
drivers/scsi/sd.c
sound/core/compress_offload.c
Change-Id: I9f77fe42aaae249c24cd6e170202110ab1426878
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
The sysctl node sched_new_task_windows is only for CONFIG_SCHED_HMP and
CONFIG_SCHED_FREQ_INPUT.
Change-Id: I4791e977fa8516fd2cd31198f71103b8d7e874c3
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Select given task's prev_cpu when the task slept for short period to
reduce latency of task placement and migrations. A new tunable
/proc/sys/kernel/sched_select_prev_cpu_us introduced to determine whether
tasks are eligible to go through fast path.
CRs-fixed: 947467
Change-Id: Ia507665b91f4e9f0e6ee1448d8df8994ead9739a
[joonwoop@codeaurora.org: fixed conflict in include/linux/sched.h,
include/linux/sched/sysctl.h, kernel/sched/core.c and kernel/sysctl.c]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
At present, HMP scheduler uses sched_clock to setup window boundary to
be aligned with timer interrupt to ensure timer interrupt fires after
window rollover. However this alignment won't last long since the timer
interrupt rearms next timer based on time measured by ktime which isn't
coupled with sched_clock.
Convert sched_clock to ktime to avoid wallclock discrepancy between
scheduler and timer so that we can ensure scheduler's window boundary is
always aligned with timer.
CRs-fixed: 933330
Change-Id: I4108819a4382f725b3ce6075eb46aab0cf670b7e
[joonwoop@codeaurora.org: fixed minor conflict in include/linux/tick.h
and kernel/sched/core.c. omitted fixes for kernel/sched/qhmp_core.c]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Following the change "57e2905 sched: Skip resetting HMP stats when
max frequencies remain unchanged" the scheduler fails to update
min/max capacities appropriately when CPUs are hot added after being
hot removed. Fix this problem by handling the CPUFREQ_CREATE_POLICY
notification and explicitly updating min/max capacities.
Change-Id: I5dadac3258e18897fa3d505cf128ebe24c091efa
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
cpu_hardirq_time and cpu_softirq_time are protected with
seqlock on 32bit systems. There is a potential deadlock
with this seqlock and rq->lock.
CPU 1 CPU0
========================== ========================
--> acquire CPU0 rq->lock --> __irq_enter()
----> task enqueue/dequeue ----> irqtime_account_irq()
------> update_rq_clock() ------> irq_time_write_begin()
--------> irq_time_read() --------> sched_account_irqtime()
(waiting for the seqlock (waiting for the CPU0 rq->lock)
held in irq_time_write_begin()
Fix this issue by dropping the seqlock before calling
sched_account_irqtime()
Change-Id: I29a33876e372f99435a57cc11eada9c8cfd59a3f
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Scheduler ftrace events currently generate a lot of data when turned
on. The excessive log messages often end up overflowing trace buffers
for long use cases or crowding out other events. Optimize scheduler
events so that the log spew is less and more manageable. To that end
change the variable type for some event fields; introduce variants
of sched_cpu_load that can be turned on/off for separate code paths
and remove unused fields from various events.
Change-Id: I2b313542b39ad5e09a01ad1303b5dfe2c4883b8a
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
[joonwoop@codeaurora.org: fixed conflict in rt.c due to
CONFIG_SCHED_QHMP.]
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
It's possible select_best_cpu() gets called before the first cpufreq
notifier call. In such scenario select_best_cpu() can hang forever by
not clearing search_cpus.
Initialize frequency domain cpumask with the CPU of rq to avoid such
scenario.
CRs-fixed: 931349
Change-Id: If8d31c5477efe61ad7c6b336ba9e27ca6f556b63
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
