Re: [Qemu-discuss] [Qemu-devel] KVM guest gets aborted if blockcommit is called

[Christian Rößner]

> Am 25.08.2015 um 08:02 schrieb Christian Rößner <address@hidden>:
> 
> Hello,
> 
> I wrote this mail to the qemu-discuss mailing list, but today I am unsure, if 
> I chose the right list. So I copy and paste this mail here in hope someone 
> can respond :-)
> 
> I have reproducable problems with some code in qemu-coroutine.c:
> 
> 
> void qemu_coroutine_enter(Coroutine *co, void *opaque)
> {
>    Coroutine *self = qemu_coroutine_self();
>    CoroutineAction ret;
> 
>    trace_qemu_coroutine_enter(self, co, opaque);
> 
>    if (co->caller) {
>        fprintf(stderr, "Co-routine re-entered recursively\n");
>        abort();   <————————— This one triggers 4 or 5 out of ten tests to use 
> the blockcommit feature
>    }

Caught Co-routine SIGABRT while a blockcommit operation was running.

Recompiled with debugging symbols and I connected gdb to the process:

(gdb) bt
#0  0x00007f4b6e6ccb8e in raise () from /lib64/libc.so.6
#1  0x00007f4b6e6ce391 in abort () from /lib64/libc.so.6
#2  0x0000555a316a8c39 in qemu_coroutine_enter (co=0x555a34651a50, opaque=0x0)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/qemu-coroutine.c:111
#3  0x0000555a316a8eda in qemu_co_queue_run_restart (address@hidden)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/qemu-coroutine-lock.c:59
#4  0x0000555a316a8b53 in qemu_coroutine_enter (co=0x555a33d271b0, 
opaque=<optimized out>)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/qemu-coroutine.c:118
#5  0x0000555a316e3adf in bdrv_co_aio_rw_vector (address@hidden,
    address@hidden, address@hidden,
    address@hidden, address@hidden(unknown: 0),
    address@hidden <mirror_read_complete>, opaque=0x555a3367d2c0, 
address@hidden)
    at /var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/block/io.c:2142
#6  0x0000555a316e4b1e in bdrv_aio_readv (address@hidden,
    address@hidden, address@hidden,
    address@hidden, address@hidden <mirror_read_complete>,
    address@hidden)
    at /var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/block/io.c:1744
#7  0x0000555a316e2ccf in mirror_iteration (s=0x555a34a0c250)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/block/mirror.c:302
#8  mirror_run (opaque=0x555a34a0c250)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/block/mirror.c:512
#9  0x0000555a316a9a5a in coroutine_trampoline (i0=<optimized out>, 
i1=<optimized out>)
    at 
/var/tmp/portage/app-emulation/qemu-2.4.0/work/qemu-2.4.0/coroutine-ucontext.c:80
#10 0x00007f4b6e6df4a0 in ?? () from /lib64/libc.so.6
#11 0x00007ffe67b71840 in ?? ()
#12 0x0000000000000000 in ?? ()
(gdb)

Please, could someone reply to me :-)

Thanks

Christian

smime.p7s
Description: S/MIME cryptographic signature