aboutsummaryrefslogtreecommitdiff
path: root/fs/gfs2/inode.c
diff options
context:
space:
mode:
authorSteven Whitehouse <swhiteho@redhat.com>2012-02-08 12:58:32 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2012-02-28 17:10:21 +0000
commit66fc061bda3526650328b73f69985da3518c4256 (patch)
tree350471fda86ebf60fee5436350d36ce9cedbea75 /fs/gfs2/inode.c
parent47ac5537a794fc71f89d51af492a945bd233f70c (diff)
GFS2: FITRIM ioctl support
The FITRIM ioctl provides an alternative way to send discard requests to the underlying device. Using the discard mount option results in every freed block generating a discard request to the block device. This can be slow, since many block devices can only process discard requests of larger sizes, and also such operations can be time consuming. Rather than using the discard mount option, FITRIM allows a sweep of the filesystem on an occasional basis, and also to optionally avoid sending down discard requests for smaller regions. In GFS2 FITRIM will work at resource group granularity. There is a flag for each resource group which keeps track of which resource groups have been trimmed. This flag is reset whenever a deallocation occurs in the resource group, and set whenever a successful FITRIM of that resource group has taken place. This helps to reduce repeated discard requests for the same block ranges, again improving performance. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 56987460cda..c98a60ee6df 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1036,7 +1036,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
- rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
+ rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
if (!rgd)
goto out_inodes;
@@ -1255,7 +1255,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
* this is the case of the target file already existing
* so we unlink before doing the rename
*/
- nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
+ nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
if (nrgd)
gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
}