summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_trans.c
diff options
context:
space:
mode:
authorJeff Liu <jeff.liu@oracle.com>2013-01-28 21:27:53 +0800
committerBen Myers <bpm@sgi.com>2013-02-01 14:56:31 -0600
commita21cd503678286c56b1d0cca1c99349a4aa042f4 (patch)
tree4683abe5052fb4bef1f765a1cea556864b6ea4f9 /fs/xfs/xfs_trans.c
parent762c585b187cde93bbb8cadd3cb3871bbae1b75a (diff)
downloadlinux-a21cd503678286c56b1d0cca1c99349a4aa042f4.tar.bz2
xfs: refactor space log reservation for XFS_TRANS_ATTR_SET
Currently, we calculate the attribute set transaction log space reservation at runtime in two parts: 1) XFS_ATTRSET_LOG_RES() which is calcuated out at mount time. 2) ((ext * (mp)->m_sb.sb_sectsize) + \ (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \ (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))) which is calculated out at runtime since it depend on the given extent length in blocks. This patch renamed XFS_ATTRSET_LOG_RES(mp) to XFS_ATTRSETM_LOG_RES(mp) to indicate that it is figured out at mount time. Introduce XFS_ATTRSETRT_LOG_RES(mp) which would be used to calculate out the unit of the log space reservation for one block. In this way, the total runtime space for the given extent length can be figured out by: XFS_ATTRSETM_LOG_RES(mp) + XFS_ATTRSETRT_LOG_RES(mp) * ext Signed-off-by: Jie Liu <jeff.liu@oracle.com> CC: Dave Chinner <david@fromorbit.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_trans.c')
-rw-r--r--fs/xfs/xfs_trans.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 72da2aa08421..2fd7c1ff1d21 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -489,17 +489,18 @@ xfs_calc_attrinval_reservation(
}
/*
- * Setting an attribute.
+ * Setting an attribute at mount time.
* the inode getting the attribute
* the superblock for allocations
* the agfs extents are allocated from
* the attribute btree * max depth
* the inode allocation btree
* Since attribute transaction space is dependent on the size of the attribute,
- * the calculation is done partially at mount time and partially at runtime.
+ * the calculation is done partially at mount time and partially at runtime(see
+ * below).
*/
STATIC uint
-xfs_calc_attrset_reservation(
+xfs_calc_attrsetm_reservation(
struct xfs_mount *mp)
{
return XFS_DQUOT_LOGRES(mp) +
@@ -509,6 +510,24 @@ xfs_calc_attrset_reservation(
}
/*
+ * Setting an attribute at runtime, transaction space unit per block.
+ * the superblock for allocations: sector size
+ * the inode bmap btree could join or split: max depth * block size
+ * Since the runtime attribute transaction space is dependent on the total
+ * blocks needed for the 1st bmap, here we calculate out the space unit for
+ * one block so that the caller could figure out the total space according
+ * to the attibute extent length in blocks by: ext * XFS_ATTRSETRT_LOG_RES(mp).
+ */
+STATIC uint
+xfs_calc_attrsetrt_reservation(
+ struct xfs_mount *mp)
+{
+ return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
+ xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK),
+ XFS_FSB_TO_B(mp, 1));
+}
+
+/*
* Removing an attribute.
* the inode: inode size
* the attribute btree could join: max depth * block size
@@ -641,7 +660,8 @@ xfs_trans_init(
resp->tr_writeid = xfs_calc_writeid_reservation(mp);
resp->tr_addafork = xfs_calc_addafork_reservation(mp);
resp->tr_attrinval = xfs_calc_attrinval_reservation(mp);
- resp->tr_attrset = xfs_calc_attrset_reservation(mp);
+ resp->tr_attrsetm = xfs_calc_attrsetm_reservation(mp);
+ resp->tr_attrsetrt = xfs_calc_attrsetrt_reservation(mp);
resp->tr_attrrm = xfs_calc_attrrm_reservation(mp);
resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp);
resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);