From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
linux-rt-users <linux-rt-users@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Carsten Emde <C.Emde@osadl.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
John Kacur <jkacur@redhat.com>, Julia Cartwright <julia@ni.com>,
Daniel Wagner <wagi@monom.org>, Tom Zanussi <zanussi@kernel.org>,
"Srivatsa S. Bhat" <srivatsa@csail.mit.edu>,
Matt Fleming <matt@codeblueprint.co.uk>
Subject: [PATCH RT 4/8] mm/memcontrol: Move misplaced local_unlock_irqrestore()
Date: Fri, 06 Mar 2020 13:40:39 -0500 [thread overview]
Message-ID: <20200306184052.332769343@goodmis.org> (raw)
In-Reply-To: 20200306184035.948924528@goodmis.org
4.19.106-rt45-rc1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Matt Fleming <matt@codeblueprint.co.uk>
[ Upstream commit 071a1d6a6e14d0dec240a8c67b425140d7f92f6a ]
The comment about local_lock_irqsave() mentions just the counters and
css_put_many()'s callback just invokes a worker so it is safe to move the
unlock function after memcg_check_events() so css_put_many() can be invoked
without the lock acquired.
Cc: Daniel Wagner <wagi@monom.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
[bigeasy: rewrote the patch description]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 421ac74450f6..519528959eef 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6540,10 +6540,10 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
mem_cgroup_charge_statistics(memcg, page, PageTransHuge(page),
-nr_entries);
memcg_check_events(memcg, page);
+ local_unlock_irqrestore(event_lock, flags);
if (!mem_cgroup_is_root(memcg))
css_put_many(&memcg->css, nr_entries);
- local_unlock_irqrestore(event_lock, flags);
}
/**
--
2.25.0
next prev parent reply other threads:[~2020-03-06 18:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-06 18:40 [PATCH RT 0/8] Linux 4.19.106-rt45-rc1 Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 1/8] userfaultfd: Use a seqlock instead of seqcount Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 2/8] sched: migrate_enable: Use per-cpu cpu_stop_work Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 3/8] sched: migrate_enable: Remove __schedule() call Steven Rostedt
2020-03-06 18:40 ` Steven Rostedt [this message]
2020-03-06 18:40 ` [PATCH RT 5/8] locallock: Include header for the `current macro Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 6/8] drm/vmwgfx: Drop preempt_disable() in vmw_fifo_ping_host() Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 7/8] tracing: make preempt_lazy and migrate_disable counter smaller Steven Rostedt
2020-03-06 18:40 ` [PATCH RT 8/8] Linux 4.19.106-rt45-rc1 Steven Rostedt
2020-03-09 19:47 [PATCH RT 0/8] Linux v4.14.172-rt78-rc1 zanussi
2020-03-09 19:47 ` [PATCH RT 4/8] mm/memcontrol: Move misplaced local_unlock_irqrestore() zanussi
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