lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

xfs: push the ilock into xfs_zero_eof

Browse Source 
Instead of calling xfs_zero_eof with the ilock held only take it internally
for the minimall required critical section around xfs_bmapi_read.  This
also requires changing the calling convention for xfs_zero_last_block
slightly.  The actual zeroing operation is still serialized by the iolock,
which must be taken exclusively over the call to xfs_zero_eof.

We could in fact use a shared lock for the xfs_bmapi_read calls as long as
the extent list has been read in, but given that we already hold the iolock
exclusively there is little reason to micro optimize this further.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig
2012-03-27 10:34:49 -04:00
committed by Ben Myers
parent f38996f576
commit 193aec1050
2 changed files with 62 additions and 101 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/xfs/xfs_iops.c
View File

@@ -764,9 +764,7 @@ xfs_setattr_size(
* before the inode is joined to the transaction to modify
* i_size.
*/
xfs_ilock(ip, XFS_ILOCK_EXCL);
error = xfs_zero_eof(ip, newsize, oldsize);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
if (error)
goto out_unlock;
}