Hugh Dickins 9b7f43afd4 memcg: fix Bad page state after replace_page_cache ...

My 9ce70c0240d0 "memcg: fix deadlock by inverting lrucare nesting" put a
nasty little bug into v3.3's version of mem_cgroup_replace_page_cache(),
sometimes used for FUSE.  Replacing __mem_cgroup_commit_charge_lrucare()
by __mem_cgroup_commit_charge(), I used the "pc" pointer set up earlier:
but it's for oldpage, and needs now to be for newpage.  Once oldpage was
freed, its PageCgroupUsed bit (cleared above but set again here) caused
"Bad page state" messages - and perhaps worse, being missed from newpage.
(I didn't find this by using FUSE, but in reusing the function for tmpfs.)

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org [v3.3 only]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-04-18 23:40:57 -07:00

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backing-dev.c

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bootmem.c

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bounce.c

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cleancache.c

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compaction.c

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debug-pagealloc.c

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dmapool.c

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fadvise.c

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failslab.c

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filemap_xip.c

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filemap.c

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fremap.c

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highmem.c

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huge_memory.c

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hugetlb.c

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hwpoison-inject.c

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init-mm.c

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internal.h

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Kconfig

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Kconfig.debug

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kmemcheck.c

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kmemleak-test.c

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kmemleak.c

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ksm.c

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maccess.c

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madvise.c

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Makefile

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memblock.c

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memcontrol.c

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memory_hotplug.c

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memory-failure.c

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memory.c

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mempolicy.c

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mempool.c

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migrate.c

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mincore.c

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mlock.c

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mm_init.c

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mmap.c

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mmu_context.c

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mmu_notifier.c

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mmzone.c

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mprotect.c

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mremap.c

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msync.c

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nobootmem.c

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nommu.c

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oom_kill.c

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page_alloc.c

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page_cgroup.c

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page_io.c

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page_isolation.c

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page-writeback.c

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pagewalk.c

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percpu-km.c

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percpu-vm.c

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percpu.c

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pgtable-generic.c

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prio_tree.c

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process_vm_access.c

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quicklist.c

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readahead.c

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rmap.c

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shmem.c

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slab.c

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slob.c

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slub.c

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sparse-vmemmap.c

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sparse.c

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swap_state.c

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swap.c

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swapfile.c

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thrash.c

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truncate.c

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util.c

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vmalloc.c

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vmscan.c

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vmstat.c

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