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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: xming <xmingske@gmail.com>
Cc: "Christopher S. Aker" <caker@theshore.net>,
	virtualization@lists.linux-foundation.org,
	Keir Fraser <Keir.Fraser@cl.cam.ac.uk>,
	Xen-devel <xen-devel@lists.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Xen paravirt frontend block hang
Date: Thu, 28 Feb 2008 12:03:00 -0800	[thread overview]
Message-ID: <47C71374.8010808@goop.org> (raw)
In-Reply-To: <519a8b110802070612j2a1717f3s6aa25eeea8b7d18a@mail.gmail.com>

xming wrote:
> On Feb 7, 2008 5:09 AM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>   
>> xming wrote:
>>     
>>> But I do have one problem after I upgraded to xen 3.2, the 2.6.23.x domU do
>>> not boot any more and 2.6.24 does boot but will hang after cpufreq changes
>>> the frequency.
>>>
>>>       
>> Interesting.  Do you mean dom0 cpufreq frequency changes will cause the
>> domU to hang?
>>
>>     J
>>
>>     
>
> Yes, when Dom0 changes freq while domU is doing something will trigger this.
> When using "on demand" will trigger this very eassily.
>
> This is from xm top when a domU hangs:
>
>     test32 ------       4018   98.8     131072    6.4     131072
> 6.4     1    1     4516    50087    1        0   433908   300403
> 3084907223
>
> So it appers to be running (eating CPU) sometimes the state is "r"
> sometimes "-",
> but both console and network are dead.
>   

I haven't tried to repro this yet, but I suspect I won't be able to 
because all my test machines have constant_tsc.  Does CPU change TSC 
rate on processor speed changes?

    J

WARNING: multiple messages have this Message-ID (diff)
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: xming <xmingske@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Keir Fraser <Keir.Fraser@cl.cam.ac.uk>,
	virtualization@lists.linux-foundation.org,
	Xen-devel <xen-devel@lists.xensource.com>
Subject: Re: Xen paravirt frontend block hang
Date: Thu, 28 Feb 2008 12:03:00 -0800	[thread overview]
Message-ID: <47C71374.8010808@goop.org> (raw)
In-Reply-To: <519a8b110802070612j2a1717f3s6aa25eeea8b7d18a@mail.gmail.com>

xming wrote:
> On Feb 7, 2008 5:09 AM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>   
>> xming wrote:
>>     
>>> But I do have one problem after I upgraded to xen 3.2, the 2.6.23.x domU do
>>> not boot any more and 2.6.24 does boot but will hang after cpufreq changes
>>> the frequency.
>>>
>>>       
>> Interesting.  Do you mean dom0 cpufreq frequency changes will cause the
>> domU to hang?
>>
>>     J
>>
>>     
>
> Yes, when Dom0 changes freq while domU is doing something will trigger this.
> When using "on demand" will trigger this very eassily.
>
> This is from xm top when a domU hangs:
>
>     test32 ------       4018   98.8     131072    6.4     131072
> 6.4     1    1     4516    50087    1        0   433908   300403
> 3084907223
>
> So it appers to be running (eating CPU) sometimes the state is "r"
> sometimes "-",
> but both console and network are dead.
>   

I haven't tried to repro this yet, but I suspect I won't be able to 
because all my test machines have constant_tsc.  Does CPU change TSC 
rate on processor speed changes?

    J

  parent reply	other threads:[~2008-02-28 20:07 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-26 19:33 Xen paravirt frontend block hang Christopher S. Aker
2007-12-28 23:14 ` Jeremy Fitzhardinge
2007-12-29  1:12   ` Christopher S. Aker
2007-12-29  6:00     ` Jeremy Fitzhardinge
2008-01-29  0:22   ` Christopher S. Aker
2008-01-29  0:40     ` Jeremy Fitzhardinge
2008-01-29  1:04       ` Christopher S. Aker
2008-02-06 12:37         ` xming
2008-02-07  4:09           ` Jeremy Fitzhardinge
2008-02-07 14:12             ` xming
2008-02-28 20:03               ` Jeremy Fitzhardinge
2008-02-28 20:03               ` Jeremy Fitzhardinge [this message]
2008-02-28 20:03                 ` Jeremy Fitzhardinge
2008-03-18 16:02               ` Jeremy Fitzhardinge
2008-02-28 20:00 ` Jeremy Fitzhardinge
2008-02-28 20:00 ` Jeremy Fitzhardinge
2008-02-28 20:00   ` Jeremy Fitzhardinge
2008-03-02  0:43   ` Christopher S. Aker
2008-03-02  0:43   ` Christopher S. Aker
2008-03-02  0:43     ` Christopher S. Aker
2008-03-02 15:35     ` Jeremy Fitzhardinge
2008-03-02 15:35     ` Jeremy Fitzhardinge
2008-03-02 15:35       ` Jeremy Fitzhardinge
2008-03-02 16:03       ` Christopher S. Aker
2008-03-02 16:03         ` Christopher S. Aker
2008-03-18 16:01         ` [Xen-devel] " Jeremy Fitzhardinge
2008-03-18 16:01         ` Jeremy Fitzhardinge
2008-03-18 16:01           ` Jeremy Fitzhardinge
2008-03-25  1:37           ` [Xen-devel] " Christopher S. Aker
2008-03-25  1:37             ` Christopher S. Aker
2008-03-25  1:37           ` [Xen-devel] " Christopher S. Aker
2008-03-02 16:03       ` Christopher S. Aker

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