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| author | Jan Kara <jack@suse.cz> | 2010-04-28 21:04:29 +0400 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-05-21 21:30:46 +0400 |
| commit | ae4f6ef13417deaa49471c0e903914a3ef3be258 (patch) | |
| tree | b8ba5499a8ad69678a232ece4d64d18447063054 /fs/ocfs2/quota_global.c | |
| parent | f64dd44eb748438783b10b3f7a4968d2656a3c95 (diff) | |
| download | linux-ae4f6ef13417deaa49471c0e903914a3ef3be258.tar.xz | |
ocfs2: Avoid unnecessary block mapping when refreshing quota info
The position of global quota file info does not change. So we do not have
to do logical -> physical block translation every time we reread it from
disk. Thus we can also avoid taking ip_alloc_sem.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ocfs2/quota_global.c')
| -rw-r--r-- | fs/ocfs2/quota_global.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c index f461f9678f9f..f391b11ea98c 100644 --- a/fs/ocfs2/quota_global.c +++ b/fs/ocfs2/quota_global.c @@ -325,6 +325,7 @@ int ocfs2_global_read_info(struct super_block *sb, int type) struct ocfs2_global_disk_dqinfo dinfo; struct mem_dqinfo *info = sb_dqinfo(sb, type); struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; + u64 pcount; int status; mlog_entry_void(); @@ -351,9 +352,19 @@ int ocfs2_global_read_info(struct super_block *sb, int type) mlog_errno(status); goto out_err; } + + status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, + &pcount, NULL); + if (status < 0) + goto out_unlock; + + status = ocfs2_qinfo_lock(oinfo, 0); + if (status < 0) + goto out_unlock; status = sb->s_op->quota_read(sb, type, (char *)&dinfo, sizeof(struct ocfs2_global_disk_dqinfo), OCFS2_GLOBAL_INFO_OFF); + ocfs2_qinfo_unlock(oinfo, 0); ocfs2_unlock_global_qf(oinfo, 0); if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { mlog(ML_ERROR, "Cannot read global quota info (%d).\n", @@ -380,6 +391,10 @@ int ocfs2_global_read_info(struct super_block *sb, int type) out_err: mlog_exit(status); return status; +out_unlock: + ocfs2_unlock_global_qf(oinfo, 0); + mlog_errno(status); + goto out_err; } /* Write information to global quota file. Expects exlusive lock on quota |