diff options
| author | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:36 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:36 +0100 |
| commit | 266cf658efcf6ac33541a46740f74f50c79d2b6b (patch) | |
| tree | 5c83b0879892d509e598dfd54be3ba3679ecd348 /fs/splice.c | |
| parent | 03fb3d2af96c2783c3a5bc03f3d984cf422f0e69 (diff) | |
| download | lwn-266cf658efcf6ac33541a46740f74f50c79d2b6b.tar.gz lwn-266cf658efcf6ac33541a46740f74f50c79d2b6b.zip | |
FS-Cache: Recruit a page flags for cache management
Recruit a page flag to aid in cache management. The following extra flag is
defined:
(1) PG_fscache (PG_private_2)
The marked page is backed by a local cache and is pinning resources in the
cache driver.
If PG_fscache is set, then things that checked for PG_private will now also
check for that. This includes things like truncation and page invalidation.
The function page_has_private() had been added to make the checks for both
PG_private and PG_private_2 at the same time.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
Diffstat (limited to 'fs/splice.c')
| -rw-r--r-- | fs/splice.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/splice.c b/fs/splice.c index 4ed0ba44a966..dd727d43e5b7 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -59,7 +59,8 @@ static int page_cache_pipe_buf_steal(struct pipe_inode_info *pipe, */ wait_on_page_writeback(page); - if (PagePrivate(page) && !try_to_release_page(page, GFP_KERNEL)) + if (page_has_private(page) && + !try_to_release_page(page, GFP_KERNEL)) goto out_unlock; /* |