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ceph: use mapping->nrpages to determine if mapping is empty

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This is simpler and faster.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-09-17 10:46:44 -07:00
parent 93afd449aa
commit 18a38193ef
1 changed files with 1 additions and 12 deletions
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13
fs/ceph/caps.c
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@ -1417,17 +1417,6 @@ static int __mark_caps_flushing(struct inode *inode,
/*
* try to invalidate mapping pages without blocking.
*/
static int mapping_is_empty(struct address_space *mapping)
{
struct page *page = find_get_page(mapping, 0);
if (!page)
return 1;
put_page(page);
return 0;
}
static int try_nonblocking_invalidate(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
@ -1437,7 +1426,7 @@ static int try_nonblocking_invalidate(struct inode *inode)
invalidate_mapping_pages(&inode->i_data, 0, -1);
spin_lock(&inode->i_lock);
if (mapping_is_empty(&inode->i_data) &&
if (inode->i_data.nrpages == 0 &&
invalidating_gen == ci->i_rdcache_gen) {
/* success. */
dout("try_nonblocking_invalidate %p success\n", inode);