linux-kernel - [PATCH 2/7] HOTPLUG: Adapt cpuset hotplug callback to CPU

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Message-Id: <11800086153720-git-send-email-avi@qumranet.com>
Date:	Thu, 24 May 2007 15:10:10 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	kvm-devel@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, shaohua.li@...el.com,
	lhcs-devel@...ts.sourceforge.net, Avi Kivity <avi@...ranet.com>
Subject: [PATCH 2/7] HOTPLUG: Adapt cpuset hotplug callback to CPU_DYING

CPU_DYING is called in atomic context, so don't try to take any locks.

Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 kernel/cpuset.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index f57854b..d4ab1c6 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2138,6 +2138,9 @@ static void common_cpu_mem_hotplug_unplug(void)
 static int cpuset_handle_cpuhp(struct notifier_block *nb,
 				unsigned long phase, void *cpu)
 {
+	if (phase == CPU_DYING)
+		return NOTIFY_DONE;
+
 	common_cpu_mem_hotplug_unplug();
 	return 0;
 }
-- 
1.5.0.6

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