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authorNick Piggin <npiggin@suse.de>2006-03-31 02:29:56 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 12:18:49 -0800
commit93fac7041f082297b93655a0e49f659cd7520e40 (patch)
tree2d8f295087377d4ac0ceea49dd67bb682b04c749 /mm/swapfile.c
parent9bf9e89c3d147ca8cf9622d2d053684fba77a464 (diff)
downloadop-kernel-dev-93fac7041f082297b93655a0e49f659cd7520e40.zip
op-kernel-dev-93fac7041f082297b93655a0e49f659cd7520e40.tar.gz
[PATCH] mm: schedule find_trylock_page() removal
find_trylock_page() is an odd interface in that it doesn't take a reference like the others. Now that XFS no longer uses it, and its last remaining caller actually wants an elevated refcount, opencode that callsite and schedule find_trylock_page() for removal. 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>
Diffstat (limited to 'mm/swapfile.c')
-rw-r--r--mm/swapfile.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 39aa9d1..e5fd538 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -397,18 +397,24 @@ void free_swap_and_cache(swp_entry_t entry)
p = swap_info_get(entry);
if (p) {
- if (swap_entry_free(p, swp_offset(entry)) == 1)
- page = find_trylock_page(&swapper_space, entry.val);
+ if (swap_entry_free(p, swp_offset(entry)) == 1) {
+ page = find_get_page(&swapper_space, entry.val);
+ if (page && unlikely(TestSetPageLocked(page))) {
+ page_cache_release(page);
+ page = NULL;
+ }
+ }
spin_unlock(&swap_lock);
}
if (page) {
int one_user;
BUG_ON(PagePrivate(page));
- page_cache_get(page);
one_user = (page_count(page) == 2);
/* Only cache user (+us), or swap space full? Free it! */
- if (!PageWriteback(page) && (one_user || vm_swap_full())) {
+ /* Also recheck PageSwapCache after page is locked (above) */
+ if (PageSwapCache(page) && !PageWriteback(page) &&
+ (one_user || vm_swap_full())) {
delete_from_swap_cache(page);
SetPageDirty(page);
}
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