Dan Streetman fd5bb66cd9 zswap: don't param_set_charp while holding spinlock ... Change the zpool/compressor param callback function to release the zswap_pools_lock spinlock before calling param_set_charp, since that function may sleep when it calls kmalloc with GFP_KERNEL. While this problem has existed for a while, I wasn't able to trigger it using a tight loop changing either/both the zpool and compressor params; I think it's very unlikely to be an issue on the stable kernels, especially since most zswap users will change the compressor and/or zpool from sysfs only one time each boot - or zero times, if they add the params to the kernel boot. Fixes: c99b42c352 ("zswap: use charp for zswap param strings") Link: http://lkml.kernel.org/r/20170126155821.4545-1-ddstreet@ieee.org Signed-off-by: Dan Streetman <dan.streetman@canonical.com> Reported-by: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-02-27 18:43:45 -08:00
..
kasan	kasan: drain quarantine of memcg slab objects	2017-02-24 17:46:56 -08:00
backing-dev.c	mm/backing-dev.c: use rb_entry()	2017-02-22 16:41:30 -08:00
balloon_compaction.c
bootmem.c	mm/bootmem.c: cosmetic improvement of code readability	2017-02-22 16:41:29 -08:00
cleancache.c
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
compaction.c	mm/migration: make isolate_movable_page() return int type	2017-02-24 17:46:55 -08:00
debug_page_ref.c
debug.c
dmapool.c	mm: cleanups for printing phys_addr_t and dma_addr_t	2017-02-24 17:46:56 -08:00
early_ioremap.c
fadvise.c	mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED	2016-12-20 09:48:46 -08:00
failslab.c
filemap.c	mm: do not access page->mapping directly on page_endio	2017-02-24 17:46:56 -08:00
frame_vector.c
frontswap.c
gup.c	mm/gup: check for protnone only if it is a PTE entry	2017-02-24 17:46:56 -08:00
highmem.c
huge_memory.c	mm/thp/autonuma: use TNF flag instead of vm fault	2017-02-24 17:46:56 -08:00
hugetlb_cgroup.c
hugetlb.c	mm: alloc_contig_range: allow to specify GFP mask	2017-02-24 17:46:55 -08:00
hwpoison-inject.c
init-mm.c
internal.h	mm, rmap: check all VMAs that PTE-mapped THP can be part of	2017-02-24 17:46:55 -08:00
interval_tree.c
Kconfig
Kconfig.debug
khugepaged.c	mm: get rid of __GFP_OTHER_NODE	2017-01-10 18:31:55 -08:00
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c	mm/ksm: handle protnone saved writes when making page write protect	2017-02-24 17:46:56 -08:00
list_lru.c
maccess.c
madvise.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
Makefile	mm: introduce page_vma_mapped_walk()	2017-02-24 17:46:55 -08:00
memblock.c	memblock: embed memblock type name within struct memblock_type	2017-02-24 17:46:54 -08:00
memcontrol.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
memory_hotplug.c	memory-hotplug: use dev_online for memhp_auto_online	2017-02-24 17:46:56 -08:00
memory-failure.c	HWPOISON: soft offlining for non-lru movable page	2017-02-24 17:46:55 -08:00
memory.c	mm/autonuma: let architecture override how the write bit should be stashed in a protnone pte.	2017-02-24 17:46:56 -08:00
mempolicy.c	mm/mempolicy.c: do not put mempolicy before using its nodemask	2017-01-24 16:26:14 -08:00
mempool.c
memtest.c
migrate.c	mm: convert remove_migration_pte() to use page_vma_mapped_walk()	2017-02-24 17:46:55 -08:00
mincore.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
mlock.c
mm_init.c
mmap.c	mm, madvise: fail with ENOMEM when splitting vma will hit max_map_count	2017-02-24 17:46:55 -08:00
mmu_context.c
mmu_notifier.c
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/autonuma: let architecture override how the write bit should be stashed in a protnone pte.	2017-02-24 17:46:56 -08:00
mremap.c	userfaultfd: non-cooperative: add event for memory unmaps	2017-02-24 17:46:55 -08:00
msync.c
nobootmem.c
nommu.c	userfaultfd: non-cooperative: add event for memory unmaps	2017-02-24 17:46:55 -08:00
oom_kill.c	mm, oom: header nodemask is NULL when cpusets are disabled	2017-02-24 17:46:53 -08:00
page_alloc.c	mm/page_alloc.c: remove redundant init code for ZONE_MOVABLE	2017-02-24 17:46:56 -08:00
page_counter.c
page_ext.c
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
page_isolation.c	mm, page_alloc: avoid page_to_pfn() when merging buddies	2017-02-22 16:41:27 -08:00
page_owner.c
page_poison.c
page_vma_mapped.c	mm: convert page_mapped_in_vma() to use page_vma_mapped_walk()	2017-02-24 17:46:55 -08:00
page-writeback.c	mm/page-writeback.c: place "not" inside of unlikely() statement in wb_domain_writeout_inc()	2017-02-24 17:46:56 -08:00
pagewalk.c	mm, x86: add support for PUD-sized transparent hugepages	2017-02-24 17:46:54 -08:00
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c	mm, x86: add support for PUD-sized transparent hugepages	2017-02-24 17:46:54 -08:00
process_vm_access.c	mm: unexport __get_user_pages_unlocked()	2016-12-14 16:04:09 -08:00
quicklist.c
readahead.c
rmap.c	mm: drop page_check_address{,_transhuge}	2017-02-24 17:46:55 -08:00
shmem.c	mm/shmem.c: fix unlikely() test of info->seals to test only for WRITE and GROW	2017-02-24 17:46:56 -08:00
slab_common.c	kasan: drain quarantine of memcg slab objects	2017-02-24 17:46:56 -08:00
slab.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
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
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
swap_slots.c	mm/swap: skip readahead only when swap slot cache is enabled	2017-02-22 16:41:30 -08:00
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: vmscan: move dirty pages out of the way until they're flushed	2017-02-24 17:46:54 -08:00
swapfile.c	mm/swap: enable swap slots cache usage	2017-02-22 16:41:30 -08:00
truncate.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
usercopy.c	mm/usercopy: Switch to using lm_alias	2017-01-11 13:56:50 +00:00
userfaultfd.c	userfaultfd: mcopy_atomic: return -ENOENT when no compatible VMA found	2017-02-24 17:46:55 -08:00
util.c	userfaultfd: non-cooperative: add event for memory unmaps	2017-02-24 17:46:55 -08:00
vmacache.c
vmalloc.c	mm: cleanups for printing phys_addr_t and dma_addr_t	2017-02-24 17:46:56 -08:00
vmpressure.c	mm: vmpressure: fix sending wrong events on underflow	2017-02-24 17:46:56 -08:00
vmscan.c	mm, vmscan: clear PGDAT_WRITEBACK when zone is balanced	2017-02-24 17:46:55 -08:00
vmstat.c	mm, compaction: add vmstats for kcompactd work	2017-02-22 16:41:29 -08:00
workingset.c	mm: remove shmem_mapping() shmem_zero_setup() duplicates	2017-02-24 17:46:56 -08:00
z3fold.c	z3fold: add kref refcounting	2017-02-24 17:46:54 -08:00
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: fix comment in zsmalloc	2017-02-24 17:46:56 -08:00
zswap.c	zswap: don't param_set_charp while holding spinlock	2017-02-27 18:43:45 -08:00