From: xiakaixu1987@gmail.com
To: linux-xfs@vger.kernel.org
Cc: darrick.wong@oracle.com, Kaixu Xia <kaixuxia@tencent.com>
Subject: [PATCH v6 3/3] xfs: directly return if the delta equal to zero
Date: Fri, 16 Oct 2020 11:38:28 +0800 [thread overview]
Message-ID: <1602819508-29033-4-git-send-email-kaixuxia@tencent.com> (raw)
In-Reply-To: <1602819508-29033-1-git-send-email-kaixuxia@tencent.com>
From: Kaixu Xia <kaixuxia@tencent.com>
The xfs_trans_mod_dquot() function will allocate new tp->t_dqinfo if
it is NULL and make the changes in the tp->t_dqinfo->dqs[XFS_QM_TRANS
_{USR,GRP,PRJ}]. Nowadays seems none of the callers want to join the
dquots to the transaction and push them to device when the delta is
zero. Actually, most of time the caller would check the delta and go
on only when the delta value is not zero, so we should bail out when
it is zero.
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_trans_dquot.c | 23 +++++++++--------------
1 file changed, 9 insertions(+), 14 deletions(-)
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 0ebfd7930382..28b8ac701919 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -194,6 +194,9 @@ xfs_trans_mod_dquot(
ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
qtrx = NULL;
+ if (!delta)
+ return;
+
if (tp->t_dqinfo == NULL)
xfs_trans_alloc_dqinfo(tp);
/*
@@ -205,10 +208,8 @@ xfs_trans_mod_dquot(
if (qtrx->qt_dquot == NULL)
qtrx->qt_dquot = dqp;
- if (delta) {
- trace_xfs_trans_mod_dquot_before(qtrx);
- trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
- }
+ trace_xfs_trans_mod_dquot_before(qtrx);
+ trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
switch (field) {
/* regular disk blk reservation */
@@ -261,8 +262,7 @@ xfs_trans_mod_dquot(
ASSERT(0);
}
- if (delta)
- trace_xfs_trans_mod_dquot_after(qtrx);
+ trace_xfs_trans_mod_dquot_after(qtrx);
}
@@ -687,14 +687,9 @@ xfs_trans_dqresv(
*/
if (tp) {
ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
- if (nblks != 0)
- xfs_trans_mod_dquot(tp, dqp,
- flags & XFS_QMOPT_RESBLK_MASK,
- nblks);
- if (ninos != 0)
- xfs_trans_mod_dquot(tp, dqp,
- XFS_TRANS_DQ_RES_INOS,
- ninos);
+ xfs_trans_mod_dquot(tp, dqp, flags & XFS_QMOPT_RESBLK_MASK,
+ nblks);
+ xfs_trans_mod_dquot(tp, dqp, XFS_TRANS_DQ_RES_INOS, ninos);
}
ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
--
2.20.0
prev parent reply other threads:[~2020-10-16 3:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 3:38 [PATCH v6 0/3] xfs: random fixes for disk quota xiakaixu1987
2020-10-16 3:38 ` [PATCH v6 1/3] xfs: delete duplicated tp->t_dqinfo null check and allocation xiakaixu1987
2020-10-26 22:52 ` Darrick J. Wong
2020-11-12 2:53 ` kaixuxia
2020-11-13 1:55 ` Darrick J. Wong
2020-11-13 3:26 ` kaixuxia
2020-10-16 3:38 ` [PATCH v6 2/3] xfs: check tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag xiakaixu1987
2020-10-26 22:52 ` Darrick J. Wong
2020-10-16 3:38 ` xiakaixu1987 [this message]
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