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Date: Thu, 03 Jan 2013 12:50:33 +0100
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Subject: Re: [Qemu-devel] pthread_create failed: Resource temporarily
	unavailable
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To: Christoffer Dall <cdall@cs.columbia.edu>
Cc: Peter Maydell <peter.maydell@linaro.org>, "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>, Stefan Hajnoczi <stefanha@redhat.com>, "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>

Hi,

Am 02.01.2013 20:17, schrieb Christoffer Dall:
> I am seeing some brutal crashes with QEMU running virtio using KVM/ARM.
>=20
> The culprit seems to be when the process runs out of virtual address
> space on 32-bit systems due to some subsystem (virtio?) creating a
> large number of pthreads under heavy workloads.
>=20
> Unfortunately my QEMU expertise is too limited to pin-point the exact
> fix, nor do I have resources right now to go into it, but I wanted to
> raise this issue and spread general awareness.
>=20
> Is this a known issue or something that needs to be tracked/documented =
at least?

It is a known issue that I reported long ago, but there have been higher
priorities. ;)
Note that this failure is not specifically about creating threads but
about thread creation being one of several operations requiring some
free virtual mem, it might as well be a malloc another run. If you trace
memory usage of the process you will likely see dramatic changes over
time... why exactly is still to be investigated.

Andreas

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