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Nick Piggin 8519fb30e4 [PATCH] mm: compound release fix 
Compound pages on SMP systems can now often be freed from pagetables via
the release_pages path.  This uses put_page_testzero which does not handle
compound pages at all.  Releasing constituent pages from process mappings
decrements their count to a large negative number and leaks the reference
at the head page - net result is a memory leak.

The problem was hidden because the debug check in put_page_testzero itself
actually did take compound pages into consideration.

Fix the bug and the debug check.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2006-02-07 16:12:33 -08:00
..
Kconfig
…
Makefile [PATCH] slob: introduce the SLOB allocator 2006-01-08 20:13:41 -08:00
bootmem.c
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fadvise.c [PATCH] fadvise: return ESPIPE on FIFO/pipe 2006-01-08 20:14:00 -08:00
filemap.c [PATCH] mm: migration page refcounting fix 2006-01-18 19:20:17 -08:00
filemap.h
…
filemap_xip.c [PATCH] replace inode_update_time with file_update_time 2006-01-10 08:01:30 -08:00
fremap.c
…
highmem.c
…
hugetlb.c [PATCH] hugetlbpage: return VM_FAULT_OOM on oom 2006-02-07 16:12:31 -08:00
internal.h
…
madvise.c
…
memory.c [PATCH] Direct Migration V9: PageSwapCache checks 2006-02-01 08:53:16 -08:00
memory_hotplug.c
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mempolicy.c [PATCH] x86_64: Fix memory policy build without CONFIG_HUGETLBFS 2006-02-04 16:43:14 -08:00
mempool.c
…
mincore.c
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mlock.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
mmap.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
mprotect.c
…
mremap.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
msync.c [PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem 2006-01-09 15:59:24 -08:00
nommu.c
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oom_kill.c [PATCH] dump_stack() in oom handler 2006-02-01 08:53:18 -08:00
page-writeback.c [PATCH] mm: dirty_exceeded speedup 2006-01-18 19:20:17 -08:00
page_alloc.c [PATCH] percpu data: only iterate over possible CPUs 2006-02-05 11:06:51 -08:00
page_io.c
…
pdflush.c
…
prio_tree.c
…
readahead.c
…
rmap.c [PATCH] Direct Migration V9: Avoid writeback / page_migrate() method 2006-02-01 08:53:17 -08:00
shmem.c [PATCH] Direct Migration V9: PageSwapCache checks 2006-02-01 08:53:16 -08:00
slab.c mm/slab.c (non-NUMA): Fix compile warning and clean up code 2006-02-05 11:26:38 -08:00
slob.c [PATCH] slob: introduce the SLOB allocator 2006-01-08 20:13:41 -08:00
sparse.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
swap.c [PATCH] mm: compound release fix 2006-02-07 16:12:33 -08:00
swap_state.c [PATCH] Direct Migration V9: Avoid writeback / page_migrate() method 2006-02-01 08:53:17 -08:00
swapfile.c [PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes 2006-02-01 08:53:16 -08:00
thrash.c
…
tiny-shmem.c [PATCH] do_truncate() call fix in tiny-shmem.c 2006-01-12 09:08:49 -08:00
truncate.c [PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem 2006-01-09 15:59:24 -08:00
util.c [PATCH] slob: introduce mm/util.c for shared functions 2006-01-08 20:13:41 -08:00
vmalloc.c
…
vmscan.c [PATCH] Direct Migration V9: Avoid writeback / page_migrate() method 2006-02-01 08:53:17 -08:00