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authorChristoph Hellwig <hch@infradead.org>2010-09-30 02:25:56 +0000
committerAlex Elder <aelder@sgi.com>2010-10-18 15:08:00 -0500
commit1b0407125f9a5be63e861eb27c8af9e32f20619c (patch)
tree206f43a7131ad11b8c603247254a8eb9aa2fc17e /fs/xfs/xfs_trans.c
parent96540c78583a417113df4d027e6b68a595ab9a09 (diff)
downloadop-kernel-dev-1b0407125f9a5be63e861eb27c8af9e32f20619c.zip
op-kernel-dev-1b0407125f9a5be63e861eb27c8af9e32f20619c.tar.gz
xfs: do not use xfs_mod_incore_sb_batch for per-cpu counters
Update the per-cpu counters manually in xfs_trans_unreserve_and_mod_sb and remove support for per-cpu counters from xfs_mod_incore_sb_batch to simplify it. And added benefit is that we don't have to take m_sb_lock for transactions that only modify per-cpu counters. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_trans.c')
-rw-r--r--fs/xfs/xfs_trans.c78
1 files changed, 50 insertions, 28 deletions
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 73cf8f4..5fab0e6 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -1009,7 +1009,7 @@ void
xfs_trans_unreserve_and_mod_sb(
xfs_trans_t *tp)
{
- xfs_mod_sb_t msb[14]; /* If you add cases, add entries */
+ xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
xfs_mod_sb_t *msbp;
xfs_mount_t *mp = tp->t_mountp;
/* REFERENCED */
@@ -1017,55 +1017,61 @@ xfs_trans_unreserve_and_mod_sb(
int rsvd;
int64_t blkdelta = 0;
int64_t rtxdelta = 0;
+ int64_t idelta = 0;
+ int64_t ifreedelta = 0;
msbp = msb;
rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
- /* calculate free blocks delta */
+ /* calculate deltas */
if (tp->t_blk_res > 0)
blkdelta = tp->t_blk_res;
-
if ((tp->t_fdblocks_delta != 0) &&
(xfs_sb_version_haslazysbcount(&mp->m_sb) ||
(tp->t_flags & XFS_TRANS_SB_DIRTY)))
blkdelta += tp->t_fdblocks_delta;
- if (blkdelta != 0) {
- msbp->msb_field = XFS_SBS_FDBLOCKS;
- msbp->msb_delta = blkdelta;
- msbp++;
- }
-
- /* calculate free realtime extents delta */
if (tp->t_rtx_res > 0)
rtxdelta = tp->t_rtx_res;
-
if ((tp->t_frextents_delta != 0) &&
(tp->t_flags & XFS_TRANS_SB_DIRTY))
rtxdelta += tp->t_frextents_delta;
+ if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
+ (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
+ idelta = tp->t_icount_delta;
+ ifreedelta = tp->t_ifree_delta;
+ }
+
+ /* apply the per-cpu counters */
+ if (blkdelta) {
+ error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
+ blkdelta, rsvd);
+ if (error)
+ goto out;
+ }
+
+ if (idelta) {
+ error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT,
+ idelta, rsvd);
+ if (error)
+ goto out_undo_fdblocks;
+ }
+
+ if (ifreedelta) {
+ error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE,
+ ifreedelta, rsvd);
+ if (error)
+ goto out_undo_icount;
+ }
+
+ /* apply remaining deltas */
if (rtxdelta != 0) {
msbp->msb_field = XFS_SBS_FREXTENTS;
msbp->msb_delta = rtxdelta;
msbp++;
}
- /* apply remaining deltas */
-
- if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
- (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
- if (tp->t_icount_delta != 0) {
- msbp->msb_field = XFS_SBS_ICOUNT;
- msbp->msb_delta = tp->t_icount_delta;
- msbp++;
- }
- if (tp->t_ifree_delta != 0) {
- msbp->msb_field = XFS_SBS_IFREE;
- msbp->msb_delta = tp->t_ifree_delta;
- msbp++;
- }
- }
-
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
if (tp->t_dblocks_delta != 0) {
msbp->msb_field = XFS_SBS_DBLOCKS;
@@ -1115,8 +1121,24 @@ xfs_trans_unreserve_and_mod_sb(
if (msbp > msb) {
error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
(uint)(msbp - msb), rsvd);
- ASSERT(error == 0);
+ if (error)
+ goto out_undo_ifreecount;
}
+
+ return;
+
+out_undo_ifreecount:
+ if (ifreedelta)
+ xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd);
+out_undo_icount:
+ if (idelta)
+ xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd);
+out_undo_fdblocks:
+ if (blkdelta)
+ xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd);
+out:
+ ASSERT(error = 0);
+ return;
}
/*
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