From: "Pavel Dovgalyuk" <dovgaluk@ispras.ru>
To: 'Stefan Hajnoczi' <stefanha@gmail.com>
Cc: 'qemu-devel' <qemu-devel@nongnu.org>,
"'Paolo Bonzini'" <pbonzini@redhat.com>,
"'Pavel Dovgalyuk'" <pavel.dovgaluk@ispras.ru>,
"'Peter Maydell'" <peter.maydell@linaro.org>,
"'Alex Bennée'" <alex.bennee@linaro.org>
Subject: Re: [Qemu-devel] qemu-2.8-rc4 is broken
Date: Wed, 11 Jan 2017 10:10:59 +0300 [thread overview]
Message-ID: <000801d26bd9$dca56db0$95f04910$@ru> (raw)
In-Reply-To: <CAJSP0QW1pOcthcEt16Pp5xQu3miUh2Leq3kn3yvQqWqhi1P=QQ@mail.gmail.com>
> From: Stefan Hajnoczi [mailto:stefanha@gmail.com]
> On Wed, Dec 21, 2016 at 5:57 AM, Pavel Dovgalyuk <dovgaluk@ispras.ru> wrote:
> >> -----Original Message-----
> >> From: Stefan Hajnoczi [mailto:stefanha@gmail.com]
> >> On Tue, Dec 20, 2016 at 11:10 AM, Pavel Dovgalyuk <dovgaluk@ispras.ru> wrote:
> >> >> From: Stefan Hajnoczi [mailto:stefanha@gmail.com]
> >> >> On Tue, Dec 20, 2016 at 10:45:44AM +0300, Pavel Dovgalyuk wrote:
> >> >> > It also fails much earlier when I enable logs with "-d int -D log".
> >> >> >
> >> >> Looks like a heap corruption bug since free() is failing.
> >> >
> >> > Seems to be a race condition.
> >> > When I add logs into invalidate_page_bitmap, the bug disappears.
> >> > It seems that someone tries to free the same page bitmap twice and simultaneously.
> >>
> >> Does the following workaround prevent the crashes?
> >>
> >> -global apic-common.vapic=off
> >
> > Yes, this option helps.
> > Thank you.
>
> Good news. This can be fixed in 2.8.1 once someone finds a solution.
It seems that something still goes wrong.
I'm using this workaround, but there is a kind of deadlock in translation.
call_rcu_thread hangs at some moment in qemu_event_wait.
As far as I understand, it is used by QHT in translate-all.c.
I can't get more information yet, because logging makes everything too slow.
Pavel Dovgalyuk
next prev parent reply other threads:[~2017-01-11 7:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 9:47 [Qemu-devel] qemu-2.8-rc4 is broken Pavel Dovgalyuk
2016-12-20 7:45 ` Pavel Dovgalyuk
2016-12-20 10:21 ` Stefan Hajnoczi
2016-12-20 11:10 ` Pavel Dovgalyuk
2016-12-20 13:20 ` Stefan Hajnoczi
2016-12-20 14:02 ` Stefan Hajnoczi
2016-12-20 16:02 ` Alex Bennée
2016-12-20 16:13 ` Stefan Hajnoczi
2016-12-21 5:57 ` Pavel Dovgalyuk
2016-12-21 11:05 ` Stefan Hajnoczi
2017-01-11 7:10 ` Pavel Dovgalyuk [this message]
2017-01-11 11:41 ` Alex Bennée
2017-01-12 8:07 ` Pavel Dovgalyuk
2017-01-20 17:33 ` Alex Bennée
2017-01-23 7:50 ` Pavel Dovgalyuk
2017-01-23 9:38 ` Alex Bennée
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