2016-01-08 12:15 GMT+01:00 Jens Rosenboom <j.rosenboom@xxxxxxxx>: > When running fio-2.3 with the rbd engine, the tests themselves run > fine, but instead of the results being printed, I get: > > fio: mutex.c:163: fio_mutex_down: Assertion `mutex->magic == > 0x4d555445U' failed. > > The command I am using is > > fio --ioengine=rbd --clientname=admin --pool=test --rbdname=test1 > --rw=randwrite --runtime=10 --ramp_time=None --numjobs=1 --direct=1 > --bs=1048576B --iodepth=64 --name=test1 > > If I instead use another engine, everything is fine, e.g.: > > fio --ioengine=libaio --filename=/dev/sdb1 --rw=randwrite --runtime=10 > --ramp_time=None --numjobs=1 --direct=1 --bs=1048576B --iodepth=64 > --name=test1 > > Going back to fio-2.2.13 makes the error go away and running a git > bisect leads to the commit mentioned in the subject as the culprit, > the error turns into a Segmentation Fault at that point, though. Accidentally I found out that I can also reproduce the bug with libaio if I set LD_PRELOAD=../jemalloc/lib/libjemalloc.so compiled from https://github.com/jemalloc/jemalloc.git (tested with 3.6.0 and 4.0.4) So it seems there is some use-after-free issue in this commit. I'll try to dig into this a bit more when I get the time, but I won't be sad if someone else is faster. ;) -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
