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From: Peter Maydell <peter.maydell@linaro.org>
Date: Wed, 17 Jun 2015 09:58:27 +0100
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Subject: Re: [Qemu-devel] linux-user crashes on clone(2) when run on ppc host
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To: "Emilio G. Cota" <cota@braap.org>
Cc: Riku Voipio <riku.voipio@iki.fi>, "qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>, Alexander Graf <agraf@suse.de>, QEMU Developers <qemu-devel@nongnu.org>

On 17 June 2015 at 01:52, Emilio G. Cota <cota@braap.org> wrote:
> Hi,
>
> I'm having trouble running a simple multithreaded program on a PowerPC host machine.
>
> The machine I'm using is a ppc VM--I think it's running under KVM (I'm using
> OVH's RunAbove Power8 service):
>   admin@adsf:~/qemu$ uname -a
>   Linux adsf 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:27:09 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
>
> admin@adsf:~/qemu$ ppc64le-linux-user/qemu-ppc64le foo

Multithreaded binaries don't work with linux-user; there are a bunch
of known race conditions involving data structures we don't correctly
lock or make per-thread.

This is a long-standing issue; we're hoping we might get to fixing
it some time this year.

thanks
-- PMM