Tejun Heo bfce20eaf1 writeback: synchronize sync(2) against cgroup writeback membership switches ... commit 7fc5854f8c6efae9e7624970ab49a1eac2faefb1 upstream. sync_inodes_sb() can race against cgwb (cgroup writeback) membership switches and fail to writeback some inodes. For example, if an inode switches to another wb while sync_inodes_sb() is in progress, the new wb might not be visible to bdi_split_work_to_wbs() at all or the inode might jump from a wb which hasn't issued writebacks yet to one which already has. This patch adds backing_dev_info->wb_switch_rwsem to synchronize cgwb switch path against sync_inodes_sb() so that sync_inodes_sb() is guaranteed to see all the target wbs and inodes can't jump wbs to escape syncing. v2: Fixed misplaced rwsem init. Spotted by Jiufei. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Jiufei Xue <xuejiufei@gmail.com> Link: http://lkml.kernel.org/r/dc694ae2-f07f-61e1-7097-7c8411cee12d@gmail.com Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-06-11 12:23:41 +02:00
..
kasan	kasan: fix shadow_size calculation error in kasan_module_alloc	2018-08-24 13:26:58 +02:00
backing-dev.c	writeback: synchronize sync(2) against cgroup writeback membership switches	2019-06-11 12:23:41 +02:00
balloon_compaction.c
bootmem.c
cleancache.c
cma.c	mm/cma.c: cma_declare_contiguous: correct err handling	2019-04-27 09:33:48 +02:00
cma.h
cma_debug.c
compaction.c	mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page	2018-01-17 09:35:26 +01:00
debug-pagealloc.c	mm, hwpoison: fixup "mm: check the return value of lookup_page_ext for all call sites"	2017-11-24 11:26:29 +01:00
debug.c	mm: get rid of vmacache_flush_all() entirely	2018-09-19 22:49:00 +02:00
dmapool.c
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2018-02-25 11:03:41 +01:00
fadvise.c	mm/fadvise.c: fix signed overflow UBSAN complaint	2018-09-15 09:40:38 +02:00
failslab.c
filemap.c	mm: filemap: avoid unnecessary calls to lock_page when waiting for IO to complete during a read	2018-05-26 08:48:54 +02:00
frame_vector.c	mm: replace get_vaddr_frames() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
frontswap.c
gup.c	proc: do not access cmdline nor environ from file-backed areas	2018-12-17 21:55:17 +01:00
highmem.c
huge_memory.c	mremap: properly flush TLB before releasing the page	2018-11-10 07:41:42 -08:00
hugetlb.c	hugetlbfs: fix races and page leaks during migration	2019-03-23 08:44:23 +01:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c	mm: Add a user_ns owner to mm_struct and fix ptrace permission checks	2017-01-06 11:16:11 +01:00
internal.h	mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-11 09:08:50 -07:00
interval_tree.c
Kconfig	mm: don't allow deferred pages with NEED_PER_CPU_KM	2018-05-26 08:48:55 +02:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm/kmemleak.c: wait for scan completion before disabling free	2018-05-30 07:49:06 +02:00
ksm.c	mm/ksm: fix interaction with THP	2018-05-30 07:49:08 +02:00
list_lru.c	mm/list_lru.c: fix list_lru_count_node() to be race free	2017-07-21 07:44:56 +02:00
maccess.c
madvise.c	mm: madvise(MADV_DODUMP): allow hugetlbfs pages	2018-10-10 08:52:11 +02:00
Makefile
memblock.c	mm: consider memblock reservations for deferred memory initialization sizing	2017-06-14 13:16:26 +02:00
memcontrol.c	mm: memcg: fix use after free in mem_cgroup_iter()	2018-07-25 10:18:16 +02:00
memory-failure.c	hwpoison, memcg: forcibly uncharge LRU pages	2018-01-31 12:06:09 +01:00
memory.c	mm: replace access_remote_vm() write parameter with gup_flags	2018-12-17 21:55:17 +01:00
memory_hotplug.c	mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone	2019-03-23 08:44:26 +01:00
mempolicy.c	mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified	2019-04-27 09:33:47 +02:00
mempool.c	mm/mempool: avoid KASAN marking mempool poison checks as use-after-free	2017-08-12 19:29:09 -07:00
memtest.c
migrate.c	hugetlbfs: fix races and page leaks during migration	2019-03-23 08:44:23 +01:00
mincore.c	mm/mincore.c: make mincore() more conservative	2019-06-11 12:23:36 +02:00
mlock.c	mm: mlock: avoid increase mm->locked_vm on mlock() when already mlock2(,MLOCK_ONFAULT)	2018-12-13 09:21:33 +01:00
mm_init.c
mmap.c	mm: enforce min addr even if capable() in expand_downwards()	2019-03-23 08:44:21 +01:00
mmu_context.c	mm/mmu_context, sched/core: Fix mmu_context.h assumption	2017-12-25 14:22:09 +01:00
mmu_notifier.c
mmzone.c
mprotect.c	x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings	2018-08-15 17:42:10 +02:00
mremap.c	mremap: properly flush TLB before releasing the page	2018-11-10 07:41:42 -08:00
msync.c
nobootmem.c
nommu.c	mm: replace access_remote_vm() write parameter with gup_flags	2018-12-17 21:55:17 +01:00
oom_kill.c	mm, oom: fix use-after-free in oom_kill_process	2019-02-06 19:43:07 +01:00
page-writeback.c	mm/page-writeback.c: don't break integrity writeback on ->writepage() error	2019-01-26 09:42:55 +01:00
page_alloc.c	mm, page_alloc: do not break __GFP_THISNODE by zonelist reset	2018-07-11 16:03:51 +02:00
page_counter.c
page_ext.c	mm/page_ext.c: fix an imbalance with kmemleak	2019-04-27 09:33:48 +02:00
page_idle.c
page_io.c
page_isolation.c
page_owner.c	mm: check the return value of lookup_page_ext for all call sites	2017-11-24 08:32:25 +01:00
pagewalk.c	mm/pagewalk.c: report holes in hugetlb ranges	2017-11-24 08:32:25 +01:00
percpu-km.c
percpu-vm.c
percpu.c	percpu: include linux/sched.h for cond_resched()	2018-05-16 10:06:46 +02:00
pgtable-generic.c
process_vm_access.c	mm: replace get_user_pages_unlocked() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
quicklist.c
readahead.c
rmap.c	mm/rmap: replace BUG_ON(anon_vma->degree) with VM_WARN_ON	2019-04-03 06:23:18 +02:00
shmem.c	tmpfs: fix uninitialized return value in shmem_link	2019-03-23 08:44:34 +01:00
slab.c	mm/slab.c: kmemleak no scan alien caches	2019-04-27 09:33:48 +02:00
slab.h
slab_common.c	slub: do not merge cache if slub_debug contains a never-merge flag	2017-10-21 17:09:05 +02:00
slob.c
slub.c	slub: make ->cpu_partial unsigned int	2018-10-10 08:52:08 +02:00
sparse-vmemmap.c
sparse.c
swap.c
swap_cgroup.c	mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()	2017-07-05 14:37:15 +02:00
swap_state.c
swapfile.c	x86/speculation/l1tf: Limit swap file size to MAX_PA/2	2018-08-15 17:42:10 +02:00
truncate.c	mm: cleancache: fix corruption on missed inode invalidation	2018-12-13 09:21:33 +01:00
userfaultfd.c
util.c	mm: replace get_user_pages_unlocked() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-19 22:49:00 +02:00
vmalloc.c	mm/vmalloc.c: fix kernel BUG at mm/vmalloc.c:512!	2019-04-27 09:33:48 +02:00
vmpressure.c	mm: vmpressure: fix sending wrong events on underflow	2017-03-12 06:37:25 +01:00
vmscan.c	mm: fix the NULL mapping case in __isolate_lru_page()	2018-06-06 16:46:23 +02:00
vmstat.c	mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n	2019-04-27 09:34:02 +02:00
workingset.c
zbud.c
zpool.c
zsmalloc.c
zswap.c	zswap: re-check zswap_is_full() after do zswap_shrink()	2018-09-05 09:18:36 +02:00