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Re: [Qemu-devel] Hang in aio/multi/mutex/mcs
From: |
Alex Bennée |
Subject: |
Re: [Qemu-devel] Hang in aio/multi/mutex/mcs |
Date: |
Thu, 23 Feb 2017 19:48:52 +0000 |
User-agent: |
mu4e 0.9.19; emacs 25.2.5 |
Stefan Hajnoczi <address@hidden> writes:
> Hi Paolo,
> Alex Benne reported that Travis CI is hanging in aio/multi/mutex/mcs:
>
> https://travis-ci.org/qemu/qemu/builds/203811867
>
> 0x00007fe9d680052d in nanosleep () from
> target:/lib/x86_64-linux-gnu/libpthread.so.0
> (gdb) info threads
> Id Target Id Frame
> * 1 LWP 15116 "test-aio-multit" 0x00007fe9d680052d in nanosleep ()
> from target:/lib/x86_64-linux-gnu/libpthread.so.0
> (gdb) bt
> #0 0x00007fe9d680052d in nanosleep () from
> target:/lib/x86_64-linux-gnu/libpthread.so.0
> #1 0x00007fe9d74c6072 in g_usleep () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #2 0x000055b90b2e9dca in test_multi_fair_mutex (seconds=1, threads=5)
> at /tmp/qemu-test/src/tests/test-aio-multithread.c:363
> #3 0x00007fe9d74c365b in ?? () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #4 0x00007fe9d74c37d6 in ?? () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #5 0x00007fe9d74c37d6 in ?? () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #6 0x00007fe9d74c37d6 in ?? () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #7 0x00007fe9d74c3b2b in g_test_run_suite () from
> target:/lib/x86_64-linux-gnu/libglib-2.0.so.0
> #8 0x000055b90b2e758c in main (argc=1, argv=0x7ffd65cb4928) at
> /tmp/qemu-test/src/tests/test-aio-multithread.c:462
To reproduce:
make address@hidden J=4 DEBUG=1
/tmp/qemu-test/src/tests/docker/test-quick
This usually hangs for me. In another winder you can run:
docker exec -it $CONTAINER_NAME bash
To get access to the filesystem and see the hung tasks.
If it doesn't trigger during this stage you may need to:
cd /var/tmp/qemu-build
./tests/test-aio-multithread
Hope that helps the debugging ;-)
--
Alex Bennée