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| author | Steven Whitehouse <swhiteho@redhat.com> | 2011-09-01 16:31:59 +0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-10-21 15:39:34 +0400 |
| commit | 54335b1fca27b84baa75b1f45985d98262003837 (patch) | |
| tree | c6b21aff1759d86be56208e9981117e4383c3f47 /fs/gfs2/quota.c | |
| parent | 8339ee543ece6e2dcc1bbd97d5350163c198cf00 (diff) | |
| download | linux-54335b1fca27b84baa75b1f45985d98262003837.tar.xz | |
GFS2: Cache the most recently used resource group in the inode
This means that after the initial allocation for any inode, the
last used resource group is cached in the inode for future use.
This drastically reduces the number of lookups of resource
groups in the common case, and this the contention on that
data structure.
The allocation algorithm is the same as previously, except that we
always check to see if the goal block is within the cached rgrp
first before going to the rbtree to look one up.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/quota.c')
| -rw-r--r-- | fs/gfs2/quota.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 3a9a9749f496..10a59cd21f0c 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -813,7 +813,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) goto out_alloc; if (nalloc) - blocks += gfs2_rg_blocks(al) + nalloc * ind_blocks + RES_STATFS; + blocks += gfs2_rg_blocks(ip) + nalloc * ind_blocks + RES_STATFS; error = gfs2_trans_begin(sdp, blocks, 0); if (error) @@ -1598,7 +1598,7 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, error = gfs2_inplace_reserve(ip); if (error) goto out_alloc; - blocks += gfs2_rg_blocks(al); + blocks += gfs2_rg_blocks(ip); } /* Some quotas span block boundaries and can update two blocks, |