Vitaly Wool 76e32a2a08 z3fold: fix page locking in z3fold_alloc() ...

Stress testing of the current z3fold implementation on a 8-core system
revealed it was possible that a z3fold page deleted from its unbuddied
list in z3fold_alloc() would be put on another unbuddied list by
z3fold_free() while z3fold_alloc() is still processing it.  This has
been introduced with commit 5a27aa822 ("z3fold: add kref refcounting")
due to the removal of special handling of a z3fold page not on any list
in z3fold_free().

To fix this, the z3fold page lock should be taken in z3fold_alloc()
before the pool lock is released.  To avoid deadlocking, we just try to
lock the page as soon as we get a hold of it, and if trylock fails, we
drop this page and take the next one.

Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: <Oleksiy.Avramchenko@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2017-04-13 18:24:20 -07:00

..

kasan

kasan: report only the first error by default

2017-03-31 17:13:30 -07:00

backing-dev.c

bdi: Fix use-after-free in wb_congested_put()

2017-03-08 10:55:17 -07:00

balloon_compaction.c

mm: balloon: use general non-lru movable page feature

2016-07-26 16:19:19 -07:00

bootmem.c

mm/bootmem.c: cosmetic improvement of code readability

2017-02-22 16:41:29 -08:00

cleancache.c

cleancache: constify cleancache_ops structure

2016-01-27 09:09:57 -05:00

cma_debug.c

mm: cma_alloc: allow to specify GFP mask

2017-02-24 17:46:55 -08:00

cma.c

mm: cma: print allocation failure reason and bitmap status

2017-02-24 17:46:55 -08:00

cma.h

mm: cma: mark cma_bitmap_maxno() inline in header

2015-08-14 15:56:32 -07:00

compaction.c

sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>

2017-03-02 08:42:32 +01:00

debug_page_ref.c

mm/page_ref: add tracepoint to track down page reference manipulation

2016-03-17 15:09:34 -07:00

debug.c

mm, debug: print raw struct page data in __dump_page()

2016-12-12 18:55:08 -08:00

dmapool.c

lib/vsprintf.c: remove %Z support

2017-02-27 18:43:47 -08:00

early_ioremap.c

mm/early_ioremap: use offset_in_page macro

2015-11-05 19:34:48 -08:00

fadvise.c

mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED

2016-12-20 09:48:46 -08:00

failslab.c

mm: fault-inject take over bootstrap kmem_cache check

2016-03-15 16:55:16 -07:00

filemap.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

frame_vector.c

mm: replace get_vaddr_frames() write/force parameters with gup_flags

2016-10-19 08:11:24 -07:00

frontswap.c

mm, frontswap: convert frontswap_enabled to static key

2016-07-26 16:19:19 -07:00

gup.c

mm, gup: fix typo in gup_p4d_range()

2017-03-13 08:58:09 -07:00

highmem.c

mm/highmem: make nr_free_highpages() handles all highmem zones by itself

2016-05-19 19:12:14 -07:00

huge_memory.c

mm, thp: fix setting of defer+madvise thp defrag mode

2017-04-08 00:47:48 -07:00

hugetlb_cgroup.c

mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size

2016-05-20 17:58:30 -07:00

hugetlb.c

mm/hugetlb.c: don't call region_abort if region_chg fails

2017-03-31 17:13:30 -07:00

hwpoison-inject.c

hwpoison: use page_cgroup_ino for filtering by memcg

2015-09-10 13:29:01 -07:00

init-mm.c

mm: Add a user_ns owner to mm_struct and fix ptrace permission checks

2016-11-22 11:49:48 -06:00

internal.h

mm: move pcp and lru-pcp draining into single wq

2017-04-08 00:47:49 -07:00

interval_tree.c

mm: replace vma->sharead.linear with vma->shared

2015-02-10 14:30:31 -08:00

Kconfig

mm: THP page cache support for ppc64

2016-12-12 18:55:08 -08:00

Kconfig.debug

mm: add arch-independent testcases for RODATA

2017-02-27 18:43:48 -08:00

khugepaged.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>

2017-03-02 08:42:28 +01:00

kmemcheck.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak-test.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak.c

mm: fix section name for .data..ro_after_init

2017-03-31 17:13:30 -07:00

ksm.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>

2017-03-02 08:42:28 +01:00

list_lru.c

mm/list_lru.c: avoid error-path NULL pointer deref

2016-10-27 18:43:42 -07:00

maccess.c

x86: remove more uaccess_32.h complexity

2016-05-22 17:21:27 -07:00

madvise.c

userfaultfd: non-cooperative: userfaultfd_remove revalidate vma in MADV_DONTNEED

2017-03-09 17:01:10 -08:00

Makefile

mm: add arch-independent testcases for RODATA

2017-02-27 18:43:48 -08:00

memblock.c

mm/memblock.c: fix memblock_next_valid_pfn()

2017-03-09 17:01:10 -08:00

memcontrol.c

mm: do not call mem_cgroup_free() from within mem_cgroup_alloc()

2017-03-09 17:01:10 -08:00

memory_hotplug.c

mm: add private lock to serialize memory hotplug operations

2017-03-16 16:56:18 -07:00

memory-failure.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>

2017-03-02 08:42:35 +01:00

memory.c

mm: introduce __p4d_alloc()

2017-03-09 11:48:48 -08:00

mempolicy.c

mm/mempolicy.c: fix error handling in set_mempolicy and mbind.

2017-04-08 10:57:55 -07:00

mempool.c

Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"

2016-07-28 16:07:41 -07:00

memtest.c

memtest: remove unused header files

2015-09-08 15:35:28 -07:00

migrate.c

mm: migrate: fix remove_migration_pte() for ksm pages

2017-03-31 17:13:30 -07:00

mincore.c

mm: remove shmem_mapping() shmem_zero_setup() duplicates

2017-02-24 17:46:56 -08:00

mlock.c

Merge branch 'prep-for-5level'

2017-03-10 08:59:07 -08:00

mm_init.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

mmap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-03-02 15:20:00 -08:00

mmu_context.c

sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>

2017-03-02 08:42:38 +01:00

mmu_notifier.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>

2017-03-02 08:42:28 +01:00

mmzone.c

mm/mmzone.c: swap likely to unlikely as code logic is different for next_zones_zonelist()

2017-02-22 16:41:29 -08:00

mprotect.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

mremap.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

msync.c

mm/msync: use offset_in_page macro

2015-11-05 19:34:48 -08:00

nobootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

nommu.c

Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-03-03 10:16:38 -08:00

oom_kill.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>

2017-03-02 08:42:35 +01:00

page_alloc.c

mm: move pcp and lru-pcp draining into single wq

2017-04-08 00:47:49 -07:00

page_counter.c

mm: page_counter: let page_counter_try_charge() return bool

2015-11-05 19:34:48 -08:00

page_ext.c

mm/page_ext: support extra space allocation by page_ext user

2016-10-07 18:46:27 -07:00

page_idle.c

mm: fix handling PTE-mapped THPs in page_idle_clear_pte_refs()

2017-02-24 17:46:55 -08:00

page_io.c

writeback: add wbc_to_write_flags()

2016-11-02 10:24:03 -06:00

page_isolation.c

mm, page_alloc: avoid page_to_pfn() when merging buddies

2017-02-22 16:41:27 -08:00

page_owner.c

mm/page_owner: don't define fields on struct page_ext by hard-coding

2016-10-07 18:46:27 -07:00

page_poison.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

page_vma_mapped.c

mm: fix page_vma_mapped_walk() for ksm pages

2017-04-08 00:47:48 -07:00

page-writeback.c

sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency

2017-03-02 08:42:37 +01:00

pagewalk.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

percpu-km.c

mm: percpu: use pr_fmt to prefix output

2016-03-17 15:09:34 -07:00

percpu-vm.c

percpu: remove unused chunk_alloc parameter from pcpu_get_pages()

2017-03-06 15:56:55 -05:00

percpu.c

percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages

2017-03-06 15:55:39 -05:00

pgtable-generic.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

process_vm_access.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>

2017-03-02 08:42:28 +01:00

quicklist.c

fix Christoph's email addresses

2016-03-17 15:09:34 -07:00

readahead.c

mm: don't cap request size based on read-ahead setting

2016-12-12 18:55:08 -08:00

rmap.c

mm: rmap: fix huge file mmap accounting in the memcg stats

2017-03-31 17:13:30 -07:00

rodata_test.c

mm: add arch-independent testcases for RODATA

2017-02-27 18:43:48 -08:00

shmem.c

Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-03-03 11:38:56 -08:00

slab_common.c

kasan: drain quarantine of memcg slab objects

2017-02-24 17:46:56 -08:00

slab.c

sched/headers: Prepare to move kstack_end() from <linux/sched.h> to <linux/sched/task_stack.h>

2017-03-02 08:42:39 +01:00

slab.h

slab: remove synchronous synchronize_sched() from memcg cache deactivation path

2017-02-22 16:41:27 -08:00

slob.c

slab: introduce __kmemcg_cache_deactivate()

2017-02-22 16:41:27 -08:00

slub.c

slub: make sysfs directories for memcg sub-caches optional

2017-02-22 16:41:27 -08:00

sparse-vmemmap.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

sparse.c

mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next

2017-02-22 16:41:29 -08:00

swap_cgroup.c

mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()

2017-04-08 00:47:49 -07:00

swap_slots.c

mm, swap: Remove WARN_ON_ONCE() in free_swap_slot()

2017-03-21 14:13:19 -07:00

swap_state.c

mm/swap: skip readahead only when swap slot cache is enabled

2017-02-22 16:41:30 -08:00

swap.c

mm: move pcp and lru-pcp draining into single wq

2017-04-08 00:47:49 -07:00

swapfile.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

truncate.c

fs: add i_blocksize()

2017-02-27 18:43:46 -08:00

usercopy.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>

2017-03-02 08:42:35 +01:00

userfaultfd.c

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

util.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

vmacache.c

sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>

2017-03-02 08:42:38 +01:00

vmalloc.c

mm: don't warn when vmalloc() fails due to a fatal signal

2017-03-16 16:56:18 -07:00

vmpressure.c

mm: vmpressure: fix sending wrong events on underflow

2017-02-24 17:46:56 -08:00

vmscan.c

sched/headers: Prepare to move the memalloc_noio_*() APIs to <linux/sched/mm.h>

2017-03-02 08:42:33 +01:00

vmstat.c

mm: move pcp and lru-pcp draining into single wq

2017-04-08 00:47:49 -07:00

workingset.c

mm: workingset: fix premature shadow node shrinking with cgroups

2017-03-31 17:13:30 -07:00

z3fold.c

z3fold: fix page locking in z3fold_alloc()

2017-04-13 18:24:20 -07:00

zbud.c

mm/zbud.c: use list_last_entry() instead of list_tail_entry()

2016-01-15 11:40:52 -08:00

zpool.c

mm: zsmalloc: constify struct zs_pool name

2015-11-06 17:50:42 -08:00

zsmalloc.c

sched/headers: Prepare to remove the <linux/magic.h> include from <linux/sched/task_stack.h>

2017-03-02 08:42:40 +01:00

zswap.c

zswap: don't param_set_charp while holding spinlock

2017-02-27 18:43:45 -08:00