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Re: [Qemu-devel] vhost-user-test failure


From: Maxime Coquelin
Subject: Re: [Qemu-devel] vhost-user-test failure
Date: Sat, 24 Sep 2016 19:42:57 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

This time with Marc-André in cc:...

On 09/23/2016 07:40 PM, Maxime Coquelin wrote:


On 09/23/2016 05:41 PM, Michael S. Tsirkin wrote:
On Fri, Sep 23, 2016 at 12:36:12PM -0300, Eduardo Habkost wrote:
Hi,

I hit a weird vhost-user-test failure on travis-ci recently, on a
branch where I didn't touch any vhost-related code. From a quick
look at the code, it looks like the vhost-user code is unhappy to
see a disconnected socket.

I wasn't able to reproduce it. It seems to be a hard to reproduce
race between vhost-user code and socket reconnection.

The failure can be seen at:

https://travis-ci.org/ehabkost/qemu-hacks/jobs/162077239

Maxime looked at something similiar. Any idea?
No, not really.
Marc-André contributed a lot to these tests, I add him in cc: in case
he has an idea.

I will have a look in the mean time.

Maxime


Error output:

  **
  ERROR:tests/vhost-user-test.c:715:test_reconnect: child process
(/i386/vhost-user/reconnect/subprocess [23792]) failed unexpectedly
  qemu-system-i386: Failed to set msg fds.
  qemu-system-i386: vhost VQ 0 ring restore failed: -1: Resource
temporarily unavailable (11)
  qemu-system-i386: Failed to set msg fds.
  qemu-system-i386: vhost VQ 1 ring restore failed: -1: Resource
temporarily unavailable (11)
  GTester: last random seed: R02S2892f6ad84bd5d03acd54cb75f444243
  make: *** [check-qtest-i386] Error 1

--
Eduardo



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