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| author | Ashwin Chaugule <ashwin.chaugule@celunite.com> | 2006-12-06 20:31:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:21 -0800 |
| commit | 098fe651f7e9d759d1117c78c1a642b9b3945922 (patch) | |
| tree | 8688e367d04c8341e79d9da775dccb9dc7747509 | |
| parent | cd54e7e54318d333227b13186f9a464bf1f68d27 (diff) | |
| download | linux-3.10-098fe651f7e9d759d1117c78c1a642b9b3945922.tar.gz linux-3.10-098fe651f7e9d759d1117c78c1a642b9b3945922.tar.bz2 linux-3.10-098fe651f7e9d759d1117c78c1a642b9b3945922.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>
| -rw-r--r-- | mm/filemap.c | 1 | ||||
| -rw-r--r-- | mm/memory.c | 2 |
2 files changed, 1 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 13df01c5047..af7e2f5caea 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1445,7 +1445,6 @@ no_cached_page: * effect. */ error = page_cache_read(file, pgoff); - grab_swap_token(); /* * The page we want has now been added to the page cache. diff --git a/mm/memory.c b/mm/memory.c index 156861fcac4..a07120da868 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); |