Package: kvm Version: 85+dfsg-4 Severity: normal I can reproducably fail a kvm instance with four SCSI drives (files on the host filesystem, like so:
-drive file=disk.sda,if=scsi,index=0 ) by creating a RAID6 across them and writing a single byte: mdadm-lab:~# mdadm -Cl6 -n4 /dev/md2 /dev/sd[abcd] Continue creating array? y mdadm: array /dev/md2 started. mdadm-lab:~# dd if=/dev/zero of=/dev/md2 bs=1 count=1 The host now reports the segfault: kernel: [13778927.030083] kvm[11850]: segfault at 0 ip 47c020 sp 7fffa39ba340 error 4 in kvm[400000+1fe000] This seems to be related to SCSI not being 64bit safe, which was apparently discussed recently on the list, but I couldn't find anything. Otoh, stress-testing four disks like so: [1] Running dd if=/dev/zero of=/dev/sda bs=1 & [2] Running dd if=/dev/zero of=/dev/sdb bs=1 & [3]- Running dd if=/dev/zero of=/dev/sdc bs=1 & [4]+ Running dd if=/dev/zero of=/dev/sdd bs=1 & works just fine, so this must be something special to the way RAID-on-SCIS works. -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.31-rc3-amd64 (SMP w/1 CPU core) Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- .''`. martin f. krafft <madd...@d.o> Related projects: : :' : proud Debian developer http://debiansystem.info `. `'` http://people.debian.org/~madduck http://vcs-pkg.org `- Debian - when you have better things to do than fixing systems
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