Hi Roman, reading aio functions inside your call stack this patch comes to my mind: http://lists.nongnu.org/archive/html/qemu-stable/2014-06/msg00006.html
If you think that might be related and you have a chance to give it a try I would be interested in the reults too. Markus ________________________________________ Von: Roman Mashak [[email protected]] Gesendet: Dienstag, 11. November 2014 19:10 An: Markus Stockhausen Cc: [email protected] Betreff: Re: Qemu-discuss Digest, Vol 38, Issue 11 But one thing is common -- both errors (your and mine) happen under heavy I/O operations. 2014-11-11 13:09 GMT-05:00 Roman Mashak <[email protected]>: > Hi Markus, > > I looked at your original message > http://lists.gnu.org/archive/html/qemu-discuss/2014-06/msg00094.html > You observed assert failure trigger by the negative value of error > value passed to bdrv_error_action(), while I do not see assert fail > and error value is positive. I'm not sure if these are the same issue > or different. > > 2014-11-11 12:30 GMT-05:00 Markus Stockhausen <[email protected]>: > [skip] >>> % scp [email protected]:/home/user/image.iso . >>> ... >>> >>> After ~90-91% completed I get this in qemu: >>> [ 88.198496] perf samples too long (2506 > 2500), lowering >>> kernel.perf_event_max_sample_rate to 50000 >>> [ 117.924805] perf samples too long (5060 > 5000), lowering >>> kernel.perf_event_max_sample_rate to 25000 >>> >>> And shortly after in ovs-dpdk console: >>> APP: (0) Device has been removed from ovdk_pf port vhost0 >>> ... >>> >>> I connected to running qemu with GDB and found that the qemu sends >>> ioctl to stop vhost: >>> >>> ... >>> It looks that an error has occurred during disk I/O (frame 8) and it >>> resulted in subsequent VM stop. >> >> Do you think this is similar behaviour like my (older) bug report: >> http://lists.gnu.org/archive/html/qemu-discuss/2014-09/msg00030.html -- Roman Mashak
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