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Re: [Qemu-devel] Regression with commit 095497ffc66b7f031
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] Regression with commit 095497ffc66b7f031 |
Date: |
Fri, 15 Jul 2016 12:35:23 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
On 15/07/2016 12:12, Gerd Hoffmann wrote:
> On Fr, 2016-07-15 at 12:02 +0200, Paolo Bonzini wrote:
>>
>> On 15/07/2016 10:47, Juergen Gross wrote:
>>> Nothing scaring and no real difference between working and not working
>>> variant.
>>>
>>> Meanwhile I've been digging a little bit deeper and found the reason:
>>> libxenstore is setting up a reader thread which is waiting for the
>>> watch to fire. With above commit the stack size of that thread (16kB)
>>> is too small. Setting it to 32kB made qemu work again.
>>
>> This makes very little sense (not your fault)... The commit doesn't
>> change stack usage at all, TLS should not be on the stack.
>>
>> Can you capture a backtrace where the 16K stack is exceeded? Perhaps
>> it's only due to inlining decision on the compiler, in which case
>> Peter's patch from today is only a bandaid.
>
> Hmm, I guess I hold off the vnc pull request for now ...
Go ahead. I looked at glibc source code and the patch is okay.
Paolo
- [Qemu-devel] Regression with commit 095497ffc66b7f031, Juergen Gross, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Peter Lieven, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Juergen Gross, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Paolo Bonzini, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Peter Lieven, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Paolo Bonzini, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Peter Lieven, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Gerd Hoffmann, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031,
Paolo Bonzini <=
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Juergen Gross, 2016/07/15
- Re: [Qemu-devel] Regression with commit 095497ffc66b7f031, Paolo Bonzini, 2016/07/15
- Re: [Qemu-devel] [Xen-devel] Regression with commit 095497ffc66b7f031, Juergen Gross, 2016/07/15