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| author | Ashwin Chaugule <ashwin.chaugule@celunite.com> | 2006-12-07 05:31:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 17:39:21 +0100 |
| commit | 098fe651f7e9d759d1117c78c1a642b9b3945922 (patch) | |
| tree | 8688e367d04c8341e79d9da775dccb9dc7747509 /mm/memory.c | |
| parent | [PATCH] mm: incorrect VM_FAULT_OOM returns from drivers (diff) | |
| download | linux-098fe651f7e9d759d1117c78c1a642b9b3945922.tar.xz linux-098fe651f7e9d759d1117c78c1a642b9b3945922.zip | |
[PATCH] grab swap token reordered
Make sure the contention for the token happens _before_ any read-in and
kicks the swap-token algo only when the VM is under pressure.
Signed-off-by: Ashwin Chaugule <ashwin.chaugule@celunite.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 156861fcac43..a07120da868b 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1991,6 +1991,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, delayacct_set_flag(DELAYACCT_PF_SWAPIN); page = lookup_swap_cache(entry); if (!page) { + grab_swap_token(); /* Contend for token _before_ read-in */ swapin_readahead(entry, address, vma); page = read_swap_cache_async(entry, vma, address); if (!page) { @@ -2008,7 +2009,6 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, /* Had to read the page from swap area: Major fault */ ret = VM_FAULT_MAJOR; count_vm_event(PGMAJFAULT); - grab_swap_token(); } delayacct_clear_flag(DELAYACCT_PF_SWAPIN); |