From: Anthony Liguori <anthony@codemonkey.ws>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Glauber Costa <glommer@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] smp broken in tcg mode with --enable-io-thread?
Date: Fri, 18 Jun 2010 14:53:20 -0500 [thread overview]
Message-ID: <4C1BCEB0.6050601@codemonkey.ws> (raw)
In-Reply-To: <4C1BA0B4.2010803@siemens.com>
On 06/18/2010 11:37 AM, Jan Kiszka wrote:
> Hi,
>
> looks like SMP in emulation mode is broken once --enable-io-thread is
> turned on. Linux SMP guests lock up early during boot, often the whole
> QEMU process becomes uncontrollable after a while. That's at least the
> case here with x86 targets. The problem disappears when using
> -enable-kvm or building without --enable-io-thread.
>
That's unfortunate. I've been thinking we should enable io thread by
default but this sort of regression would certainly prevent that.
Glauber/Marcelo, any guesses about what's happening?
Regards,
Anthony Liguori
> It's not on my critical path (ie. no time to go into details), I just
> stumbled over it and wanted to drop a note.
>
> Jan
>
>
next prev parent reply other threads:[~2010-06-18 19:53 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-18 16:37 [Qemu-devel] smp broken in tcg mode with --enable-io-thread? Jan Kiszka
2010-06-18 19:53 ` Anthony Liguori [this message]
2010-06-21 19:31 ` [Qemu-devel] [PATCH] fix smp with tcg mode and --enable-io-thread Marcelo Tosatti
2010-06-21 20:25 ` [Qemu-devel] " Jan Kiszka
2010-06-21 20:58 ` Jan Kiszka
2010-06-21 23:06 ` Marcelo Tosatti
2010-06-22 8:06 ` Jan Kiszka
2010-06-23 7:42 ` Jan Kiszka
2010-06-23 16:19 ` Anthony Liguori
2010-06-21 22:13 ` Jan Kiszka
2010-06-21 22:25 ` Alexander Graf
2010-06-22 7:59 ` Jan Kiszka
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