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Message-ID: <4A171221.5020800@zytor.com>
Date: Fri, 22 May 2009 13:59:13 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Max Kellermann <mk@...all.com>
CC: Glauber Costa <glommer@...hat.com>, linux-kernel@...r.kernel.org,
ijc@...lion.org.uk, Grant Coady <grant_lkml@...o.com.au>,
Trond Myklebust <trond.myklebust@....uio.no>,
"J. Bruce Fields" <bfields@...ldses.org>,
Tom Tucker <tom@...ngridcomputing.com>,
Cyrill Gorcunov <gorcunov@...il.com>
Subject: Re: [PATCH] NFS regression in 2.6.26?, "task blocked for more than
120 seconds"
Max Kellermann wrote:
> On 2008/10/17 16:33, Glauber Costa <glommer@...hat.com> wrote:
>> That's probably something related to apic congestion.
>> Does the problem go away if the only thing you change is this:
>>
>>
>>> @@ -891,11 +897,6 @@ do_rest:
>>> store_NMI_vector(&nmi_high, &nmi_low);
>>>
>>> smpboot_setup_warm_reset_vector(start_ip);
>>> - /*
>>> - * Be paranoid about clearing APIC errors.
>>> - */
>>> - apic_write(APIC_ESR, 0);
>>> - apic_read(APIC_ESR);
>>> }
>>
>> Please let me know.
>
> Hello Glauber,
>
> I have rebooted the server with 2.6.27.1 + this patchlet an hour ago.
> No problems since.
>
> Hardware: Compaq P4 Xeon server, Broadcom CMIC-WS / CIOB-X2 board.
> Tell me if you need more detailed information.
>
I was just pointed to this thread in the archives, and I'm really
wondering what was going on here. In particular, if this machine still
is around, I would appreciate a dump of /proc/cpuinfo as well as
dmidecode from this machine.
Thanks,
-hpa
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