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authorLinus Torvalds <torvalds@linux-foundation.org>2010-12-01 13:35:19 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-12-02 09:55:21 -0500
commit6072d13c429373c5d63b69dadbbef40a9b035552 (patch)
treea2bf745efaa4092f2a8d7d9a9b160c2a7a3b303f /mm/vmscan.c
parent0aded708d125a3ff7e5abaea9c2d9c6d7ebbfdcd (diff)
downloadlwn-6072d13c429373c5d63b69dadbbef40a9b035552.tar.gz
lwn-6072d13c429373c5d63b69dadbbef40a9b035552.zip
Call the filesystem back whenever a page is removed from the page cache
NFS needs to be able to release objects that are stored in the page cache once the page itself is no longer visible from the page cache. This patch adds a callback to the address space operations that allows filesystems to perform page cleanups once the page has been removed from the page cache. Original patch by: Linus Torvalds <torvalds@linux-foundation.org> [trondmy: cover the cases of invalidate_inode_pages2() and truncate_inode_pages()] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d31d7ce52c0e..9ca587c69274 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -494,9 +494,16 @@ static int __remove_mapping(struct address_space *mapping, struct page *page)
spin_unlock_irq(&mapping->tree_lock);
swapcache_free(swap, page);
} else {
+ void (*freepage)(struct page *);
+
+ freepage = mapping->a_ops->freepage;
+
__remove_from_page_cache(page);
spin_unlock_irq(&mapping->tree_lock);
mem_cgroup_uncharge_cache_page(page);
+
+ if (freepage != NULL)
+ freepage(page);
}
return 1;