linux-kernel - Re: kvm kdump regression

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Message-ID: <4C97E9A6.6030909@kernel.org>
Date:	Tue, 21 Sep 2010 01:09:26 +0200
From:	Tejun Heo <tj@...nel.org>
To:	caiqian@...hat.com
CC:	graff yang <graff.yang@...il.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	kexec <kexec@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>, dhowells@...hat.com,
	sonic adi <sonic.adi@...il.com>,
	Chris Lalancette <clalance@...hat.com>,
	Avi Kivity <avi@...hat.com>
Subject: Re: kvm kdump regression

Hello,

Thanks a lot for testing.  Can you please verify whether the following
patch fixes the problem?

diff --git a/mm/percpu.c b/mm/percpu.c
index 58c572b..c76ef38 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1401,9 +1401,9 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,

 			if (pcpu_first_unit_cpu == NR_CPUS)
 				pcpu_first_unit_cpu = cpu;
+			pcpu_last_unit_cpu = cpu;
 		}
 	}
-	pcpu_last_unit_cpu = cpu;
 	pcpu_nr_units = unit;

 	for_each_possible_cpu(cpu)
--
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