From: ebiederm@xmission.com (Eric W. Biederman)
To: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Vivek Goyal <vgoyal@redhat.com>, Yinghai Lu <yinghai@kernel.org>,
Ingo Molnar <mingo@elte.hu>,
Jason Wessel <jason.wessel@windriver.com>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Haren Myneni <hbabu@us.ibm.com>
Subject: Re: perf hw in kexeced kernel broken in tip
Date: Wed, 08 Dec 2010 15:20:37 -0800 [thread overview]
Message-ID: <m1oc8vetru.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <20101208223746.GR21786@redhat.com> (Don Zickus's message of "Wed, 8 Dec 2010 17:37:46 -0500")
Don Zickus <dzickus@redhat.com> writes:
> On Wed, Dec 08, 2010 at 03:59:16PM +0100, Peter Zijlstra wrote:
>> On Wed, 2010-12-08 at 15:20 +0100, Peter Zijlstra wrote:
>>
>> > > I wonder if you should reverse these checks. If the bios has the perf
>> > > counter enabled, there might be a high chance that it fails the first
>> > > check and never gets to the actually bios checks.
>> >
>> > Ah, good point.
>>
>> Something like so..
>
> This seems to work correctly on my Nehalem and broken bios machines during
> boot and kexec. As expected it fails during kdump. My p4 box failed
> during kexec for some reason. But p4 has other issues.
Does the kdump kernel still boot?
It looks like it should I just want to double check.
Eric
next prev parent reply other threads:[~2010-12-08 23:20 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-01 8:00 Yinghai Lu
2010-12-01 11:27 ` Peter Zijlstra
2010-12-01 16:06 ` Vivek Goyal
2010-12-01 16:11 ` Peter Zijlstra
2010-12-01 16:23 ` Vivek Goyal
2010-12-01 19:38 ` Peter Zijlstra
2010-12-01 19:46 ` Vivek Goyal
2010-12-01 19:49 ` Peter Zijlstra
2010-12-01 19:58 ` Vivek Goyal
2010-12-01 20:07 ` Peter Zijlstra
2010-12-01 21:48 ` Eric W. Biederman
2010-12-02 5:23 ` Don Zickus
2010-12-02 7:34 ` Peter Zijlstra
2010-12-02 16:15 ` Don Zickus
2010-12-07 23:30 ` Peter Zijlstra
2010-12-08 14:01 ` Don Zickus
2010-12-08 14:20 ` Peter Zijlstra
2010-12-08 14:42 ` Vivek Goyal
2010-12-08 14:48 ` Peter Zijlstra
2010-12-08 15:02 ` Vivek Goyal
2010-12-08 15:15 ` Peter Zijlstra
2010-12-08 15:22 ` Vivek Goyal
2010-12-08 21:16 ` Eric W. Biederman
2010-12-08 14:59 ` Peter Zijlstra
2010-12-08 18:43 ` Yinghai Lu
2010-12-08 19:01 ` Don Zickus
2010-12-08 19:05 ` Yinghai Lu
2010-12-08 19:17 ` Peter Zijlstra
2010-12-08 19:20 ` Yinghai Lu
2010-12-08 19:06 ` Peter Zijlstra
2010-12-08 19:20 ` Yinghai Lu
2010-12-08 22:37 ` Don Zickus
2010-12-08 23:20 ` Eric W. Biederman [this message]
2010-12-09 4:34 ` Don Zickus
2010-12-09 20:20 ` Don Zickus
2010-12-09 20:44 ` Cyrill Gorcunov
2010-12-08 14:33 ` Peter Zijlstra
2010-12-08 14:39 ` Vivek Goyal
2010-12-07 21:16 ` Don Zickus
2010-12-08 0:26 ` Yinghai Lu
2010-12-08 10:39 ` Peter Zijlstra
2010-12-01 20:41 ` Eric W. Biederman
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