From: xiakaixu1987@gmail.com
To: linux-xfs@vger.kernel.org
Cc: darrick.wong@oracle.com, Kaixu Xia <kaixuxia@tencent.com>
Subject: [PATCH v3 5/5] xfs: directly return if the delta equal to zero
Date: Wed, 7 Oct 2020 22:51:12 +0800 [thread overview]
Message-ID: <1602082272-20242-6-git-send-email-kaixuxia@tencent.com> (raw)
In-Reply-To: <1602082272-20242-1-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>
---
fs/xfs/xfs_trans_dquot.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 0ebfd7930382..3e37501791bf 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);
}
--
2.20.0
next prev parent reply other threads:[~2020-10-07 14:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-07 14:51 [PATCH v3 0/5] xfs: random fixes for disk quota xiakaixu1987
2020-10-07 14:51 ` [PATCH v3 1/5] xfs: do the ASSERT for the arguments O_{u,g,p}dqpp xiakaixu1987
2020-10-07 14:51 ` [PATCH v3 2/5] xfs: fix the indent in xfs_trans_mod_dquot xiakaixu1987
2020-10-07 14:51 ` [PATCH v3 3/5] xfs: delete duplicated tp->t_dqinfo null check and allocation xiakaixu1987
2020-10-07 22:01 ` Darrick J. Wong
2020-10-07 14:51 ` [PATCH v3 4/5] xfs: check tp->t_dqinfo value instead of the XFS_TRANS_DQ_DIRTY flag xiakaixu1987
2020-10-07 22:04 ` Darrick J. Wong
2020-10-08 0:54 ` kaixuxia
2020-10-07 14:51 ` xiakaixu1987 [this message]
2020-10-07 22:06 ` [PATCH v3 5/5] xfs: directly return if the delta equal to zero Darrick J. Wong
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