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From: Alex =?utf-8?Q?Benn=C3=A9e?= <alex.bennee@linaro.org>
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Date: Sat, 12 Nov 2016 11:01:46 +0000
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Subject: Re: [Qemu-devel] [PULL 22/55] q35: ioapic: add support for emulated
 IOAPIC IR
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To: "Emilio G. Cota" <cota@braap.org>
Cc: Peter Xu <peterx@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, qemu-devel@nongnu.org, Peter Maydell <peter.maydell@linaro.org>, Richard Henderson <rth@twiddle.net>, Eduardo Habkost <ehabkost@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>


Emilio G. Cota <cota@braap.org> writes:

> On Fri, Nov 11, 2016 at 18:17:05 -0500, Peter Xu wrote:
<snip>
>> I also tried to test with exactly the same build parameters with the
>> previous commit of above (09cd058a2c, "intel_iommu: get rid of {0}
>> initializers"), it has the same problem (TCG version cannot boot guest
>> kernel if I provide a disk as parameter).
>
> Hmm that's interesting, on my end 09cd05^ works well 100% of the time
> w/ TCG.
>
>> Do we still support gthread as coroutine backend? And to what extend
>> do we support it?
>
> I don't know :( That's why I sent the message.
>
> I'll investigate further.

We would like to drop it but tsan only works with it at the moment. We
are exploring what it would take to support the other setcontext/longjmp
backends in tsan, see:

  Message-ID: <871t8kwygw.fsf@linaro.org>

On the thread-sanitizer mailing list. If we can get it working then we
can drop QEMU's gthread backend.

--
Alex Bennée