diff options
author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2009-06-16 18:32:52 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 22:47:42 -0400 |
commit | cb4b86ba47bb0937b71fb825b3ed88adf7a190f0 (patch) | |
tree | 4b8528ba914a315e5857e7fe2a6e7d415f2e6650 /mm/shmem.c | |
parent | 6837765963f1723e80ca97b1fae660f3a60d77df (diff) |
mm: add swap cache interface for swap reference
In a following patch, the usage of swap cache is recorded into swap_map.
This patch is for necessary interface changes to do that.
2 interfaces:
- swapcache_prepare()
- swapcache_free()
are added for allocating/freeing refcnt from swap-cache to existing swap
entries. But implementation itself is not changed under this patch. At
adding swapcache_free(), memcg's hook code is moved under
swapcache_free(). This is better than using scattered hooks.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: Balbir Singh <balbir@in.ibm.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
-rw-r--r-- | mm/shmem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 0132fbd45a2..47ab1918228 100644 --- a/mm/shmem.c +++ b/mm/shmem.c | |||
@@ -1097,7 +1097,7 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc) | |||
1097 | shmem_swp_unmap(entry); | 1097 | shmem_swp_unmap(entry); |
1098 | unlock: | 1098 | unlock: |
1099 | spin_unlock(&info->lock); | 1099 | spin_unlock(&info->lock); |
1100 | swap_free(swap); | 1100 | swapcache_free(swap, NULL); |
1101 | redirty: | 1101 | redirty: |
1102 | set_page_dirty(page); | 1102 | set_page_dirty(page); |
1103 | if (wbc->for_reclaim) | 1103 | if (wbc->for_reclaim) |