Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-11 07:39:47 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

xfs: optimize the negative xattr caching

Browse Source 
Since the addition of file capabilities every write needs to read xattrs to
check if we have any capabilities to clear.  In Linux 3.0 Andi Kleen added
a flag to cache the fact that we do not have any attributes on an inode.
Make sure to already mark a file as not having any attributes when reading
it from disk in case it doesn't even have an attribute fork.  Based on an
earlier patch from Andi Kleen.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2011-07-26 15:07:29 +00:00 committed by Alex Elder
parent d1166ec792
commit 510792ee29
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
fs/xfs/linux-2.6/xfs_iops.c
View File

@ -1194,9 +1194,14 @@ xfs_setup_inode(
break;
}
/* if there is no attribute fork no ACL can exist on this inode */
if (!XFS_IFORK_Q(ip))
/*
* If there is no attribute fork no ACL can exist on this inode,
* and it can't have any file capabilities attached to it either.
*/
if (!XFS_IFORK_Q(ip)) {
inode_has_no_xattr(inode);
cache_no_acl(inode);
}
xfs_iflags_clear(ip, XFS_INEW);
barrier();