46 lines
1.7 KiB
Diff
46 lines
1.7 KiB
Diff
From 0d65d04f961014c84ab5bd939a0605147ccdec9c Mon Sep 17 00:00:00 2001
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Message-Id: <0d65d04f961014c84ab5bd939a0605147ccdec9c.1601675153.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Matt Fleming <matt@codeblueprint.co.uk>
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Date: Sun, 26 Jan 2020 21:19:45 +0000
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Subject: [PATCH 318/333] mm/memcontrol: Move misplaced
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local_unlock_irqrestore()
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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[ Upstream commit 071a1d6a6e14d0dec240a8c67b425140d7f92f6a ]
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The comment about local_lock_irqsave() mentions just the counters and
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css_put_many()'s callback just invokes a worker so it is safe to move the
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unlock function after memcg_check_events() so css_put_many() can be invoked
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without the lock acquired.
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Cc: Daniel Wagner <wagi@monom.org>
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Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
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Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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[bigeasy: rewrote the patch description]
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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mm/memcontrol.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/mm/memcontrol.c b/mm/memcontrol.c
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index a54cfafba8ad..7b506d178aa0 100644
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--- a/mm/memcontrol.c
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+++ b/mm/memcontrol.c
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@@ -6538,10 +6538,10 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
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mem_cgroup_charge_statistics(memcg, page, PageTransHuge(page),
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-nr_entries);
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memcg_check_events(memcg, page);
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+ local_unlock_irqrestore(event_lock, flags);
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if (!mem_cgroup_is_root(memcg))
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css_put_many(&memcg->css, nr_entries);
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- local_unlock_irqrestore(event_lock, flags);
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}
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/**
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--
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2.17.1
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