Re: intermittent hang in qos-test for qemu-system-i386 on 32-bit arm host

[Coiby Xu]

On Mon, Jul 12, 2021 at 10:39:50AM +0100, Peter Maydell wrote:
> On Sun, 11 Jul 2021 at 23:55, Coiby Xu <coiby.xu@gmail.com> wrote:
> > On Mon, Jul 12, 2021 at 06:20:33AM +0800, Coiby Xu wrote:
> > >On Sun, Jul 11, 2021 at 04:53:51PM +0100, Peter Maydell wrote:
> > >>On Sat, 10 Jul 2021 at 14:30, Peter Maydell <peter.maydell@linaro.org> wrote:
> > >>>
> > >>>I've noticed recently that intermittently 'make check' will hang on
> > >>>my aarch32 test system (really an aarch64 box with an aarch32 chroot).
> > >>>
> > >>>I think from grep that this must be the vhost-user-blk test.
> > >>
> > >>I've also now seen this on qemu-system-i386 guest x86-64 Linux host:
> > >
> > >Good to to know that! This makes it much easier for me to debug this
> > >issue.
> >
> > Which i386 image do you use for the guest? Could you share the download
> > link? I can't find a suitable i386 qcow2 image. For example, [1] is
> > outdated.
>
> I'm just running "make check" on the x86-64 host, which runs tests
> on qemu-system-i386 (assuming you built i386 targets).

How often can this issue happen? Unfortunately, I can't reproduce it in
the past four days on my own laptop and two Openstack machines every now 
and then,
    git clone git://git.qemu.org/qemu.g
    mkdir build && cd build
    ../configure --target-list=i386-softmmu 
    MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(( ${RANDOM:-0} % 255 + 1))} \
      QTEST_QEMU_BINARY=build/i386-softmmu/qemu-system-i386 
QTEST_QEMU_IMG=build/qemu-img \
      QTEST_QEMU_STORAGE_DAEMON_BINARY=build/storage-daemon/qemu-storage-daemon 
\
      build/tests/qtest/qos-test

I've also tried running the whole tests using "make check" or "make
check-qtest" but the results were the same. 

> -- PMM

--
Best regards,
Coiby