From: Zachary Amsden <zamsden@redhat.com>
To: Michael Tokarev <mjt@tls.msk.ru>
Cc: Arjan Koers <0h61vkll2ly8@xutrox.com>,
kvm@vger.kernel.org, Avi Kivity <avi@redhat.com>,
Glauber Costa <glommer@redhat.com>,
Andre Przywara <andre.przywara@amd.com>
Subject: Re: 2.6.35-rc1 regression with pvclock and smp guests
Date: Thu, 30 Sep 2010 05:32:23 -1000 [thread overview]
Message-ID: <4CA4AD87.8060502@redhat.com> (raw)
In-Reply-To: <4CA4A8C5.3030407@msgid.tls.msk.ru>
On 09/30/2010 05:12 AM, Michael Tokarev wrote:
> 30.09.2010 17:54, Zachary Amsden wrote:
> []
>
>> The printk movement is just a bandaid patch, correct? Anything which
>> does printk before kvmclock is registered could trigger the same bug.
>>
> Well, I'd not say it's just a bandaid patch, it's real bug -- either
> we can read kvmclock (so it's initialized), or we don't touch it (at
> least before registration).
>
Yes, that's the bug, but moving the printk doesn't fix that, it just
hides it.
>
>> Can you try with printk timing disabled and see if the bug disappears?
>>
> Yes it disappears so far, at last I can't trigger it anymore, tried
> numerous boots including the 2.6.35.6 32bit kernel (patched with the
> printk registration patch!) which shows the prob in almost every boot.
>
So, looks like we need to do the real fix.
Zach
next prev parent reply other threads:[~2010-09-30 15:32 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-22 12:53 2.6.35-rc1 regression with pvclock and smp guests Andre Przywara
2010-07-25 8:44 ` Avi Kivity
2010-07-26 8:47 ` Andre Przywara
2010-07-26 18:59 ` Arjan Koers
2010-07-27 21:00 ` Arjan Koers
2010-07-28 10:37 ` Avi Kivity
2010-07-31 0:34 ` Arjan Koers
2010-07-31 1:38 ` Zachary Amsden
2010-07-31 11:50 ` Arjan Koers
2010-07-31 2:39 ` Zachary Amsden
2010-07-31 11:53 ` Arjan Koers
2010-07-31 16:36 ` Arjan Koers
2010-07-31 19:45 ` Arjan Koers
2010-07-31 23:55 ` Zachary Amsden
2010-08-02 14:43 ` Glauber Costa
2010-08-02 16:16 ` Arjan Koers
2010-08-02 18:07 ` Glauber Costa
2010-08-02 20:26 ` Zachary Amsden
2010-08-02 21:10 ` Glauber Costa
2010-08-02 21:35 ` Arjan Koers
2010-08-03 0:00 ` Zachary Amsden
2010-09-28 11:16 ` Michael Tokarev
2010-09-29 8:12 ` Michael Tokarev
2010-09-29 8:28 ` Avi Kivity
2010-09-29 9:17 ` Michael Tokarev
2010-09-29 9:19 ` Michael Tokarev
2010-09-29 19:26 ` Arjan Koers
2010-09-30 7:55 ` Michael Tokarev
2010-09-30 9:59 ` Michael Tokarev
2010-09-30 13:54 ` Zachary Amsden
2010-09-30 15:12 ` Michael Tokarev
2010-09-30 15:32 ` Zachary Amsden [this message]
2010-09-30 18:49 ` Arjan Koers
2010-09-30 19:05 ` Marcelo Tosatti
2010-09-30 20:16 ` Arjan Koers
2010-09-30 23:02 ` Michael Tokarev
2010-09-30 23:07 ` Michael Tokarev
2010-10-01 1:13 ` Zachary Amsden
2010-10-02 5:35 ` Zachary Amsden
2010-10-02 7:35 ` Michael Tokarev
2010-10-02 7:40 ` Michael Tokarev
2010-10-02 7:50 ` Michael Tokarev
2010-10-02 16:10 ` Arjan Koers
2010-10-02 20:26 ` Michael Tokarev
2010-10-02 23:42 ` Zachary Amsden
2010-10-03 8:27 ` Michael Tokarev
2010-10-08 0:12 ` Arjan Koers
2010-10-08 2:47 ` Zachary Amsden
2010-10-08 22:06 ` Marcelo Tosatti
2010-10-09 1:10 ` Arjan Koers
2010-10-09 2:27 ` Zachary Amsden
2010-10-09 6:29 ` Michael Tokarev
2010-10-09 8:59 ` Arjan Koers
2010-10-11 20:47 ` Zachary Amsden
2010-10-13 12:18 ` Glauber Costa
2010-10-10 1:20 ` Arjan Koers
2010-10-11 17:53 ` Anthony Liguori
2010-10-11 18:36 ` Marcelo Tosatti
2010-10-09 2:29 ` Zachary Amsden
2010-10-10 1:26 ` Arjan Koers
2010-10-20 20:47 ` Arjan Koers
2010-10-09 7:59 ` Michael Tokarev
2010-10-09 8:31 ` Michael Tokarev
2010-10-02 21:55 ` Zachary Amsden
2010-10-03 8:16 ` Michael Tokarev
2010-10-03 8:22 ` Avi Kivity
2010-10-03 8:30 ` Michael Tokarev
2010-07-27 10:03 ` Avi Kivity
2010-07-27 11:49 ` Andre Przywara
2010-07-27 12:06 ` Avi Kivity
2010-07-27 12:21 ` Andre Przywara
2010-07-27 12:34 ` Avi Kivity
2010-07-27 13:48 ` Andre Przywara
2010-07-27 13:58 ` Avi Kivity
2010-07-27 14:55 ` Andre Przywara
2010-07-27 21:51 ` Andre Przywara
2010-07-28 3:00 ` Zachary Amsden
2010-07-28 7:55 ` Andre Przywara
2010-07-28 12:25 ` Andre Przywara
2010-07-30 22:54 ` Zachary Amsden
2010-08-02 10:12 ` Andre Przywara
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