So it looks a bit like a race condition in the virtio-scsi driver. Command got canceled and the completed or something like this.
Stefan Am 11.02.2013 10:40, schrieb Stefan Hajnoczi: > On Mon, Feb 11, 2013 at 08:46:03AM +0100, Stefan Priebe - Profihost AG wrote: >> i've seen segfaults of the kvm process. Sadly i've no core dumps just >> the line from dmesg: >> kvm[26268]: segfault at c050 ip 00007fcfc3465eac sp 00007fffe85a0d00 >> error 4 in kvm[7fcfc3223000+3ba000] >> >> Is it possible to get the function and some more details out of this >> line? I've symbol files and debugging files of the kvm binary. > > Accessed address: c050 > Address of the instruction that segfaulted: 00007fcfc3465eac > Base memory address where kvm code was mmapped: 7fcfc3223000 > Length of mmap: 3ba000 > > Try the following: > > $ printf '%x' $((0x7fcfc3465eac - 0x7fcfc3223000)) > 242eac > $ addr2line -e path/to/qemu-kvm-symbols -f 242eac > > I also suggest posting about 10 lines before/after 0x242eac from the > objdump -d path/to/kvm output. That way we can sanity check that the > instruction accesses memory and see what the surrounding instructions > are doing. > > Stefan >
