android_kernel_oneplus_msm8998/init
Quentin Perret eb275f4f0d ANDROID: sched: Disallow WALT with CFS bandwidth control
The WALT time accounting breaks when CFS tasks are throttled by the CPU
bandwidth control mechanism of the CPU cgroups controller. This can
result in a negative cumulative_runnable_avg, which can then lead to a
kernel panic, and the device crashing.

Although the right fix would be add support for throttled CFS tasks to
WALT, the common kernel is now in stable maintenance mode and will not
get new features which could cause issues for partners downstream.

To work around the issue, make the CFS_BANDWIDTH Kconfig option depend
on SCHED_WALT=n, hence preventing these two things from being enabled
simultaneously. This should not be an issue for most partners (nobody
had noticed the breakage for years), and those who do need the better
fix can apply it in their device kernel.

Bug: 139071966
Bug: 120440300
Change-Id: Ieb3c367ae7893ac93fb5b38c1580dc59151aacce
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
2019-09-02 11:00:15 +00:00
..
calibrate.c
do_mounts.c
do_mounts.h
do_mounts_dm.c ANDROID: Update init/do_mounts_dm.c to the latest ChromiumOS version. 2017-04-25 15:00:50 -04:00
do_mounts_initrd.c
do_mounts_md.c
do_mounts_rd.c
init_task.c UPSTREAM: sched/core: Allow putting thread_info into task_struct 2017-08-09 15:23:22 +01:00
initramfs.c ANDROID: initramfs: call free_initrd() when skipping init 2017-12-05 18:06:12 +00:00
Kconfig ANDROID: sched: Disallow WALT with CFS bandwidth control 2019-09-02 11:00:15 +00:00
main.c This is the 4.4.180 stable release 2019-05-16 22:34:35 +02:00
Makefile
noinitramfs.c
version.c