Bugs item #2099075, was opened at 2008-09-07 22:22 Message generated for change (Comment added) made by avik You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2099075&group_id=180599 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None >Status: Pending >Resolution: Fixed Priority: 5 Private: No Submitted By: Fabio Coatti (cova) Assigned to: Nobody/Anonymous (nobody) Summary: qcow2 images corruption Initial Comment: I'm running a 32bit vm under x86_64 AMD host with kvm-74. using raw image all works fine, but with qcow2 image I'm able to get deep fs corruption with a disk intensive operation like kernel compilation. it happened every time I tried, and -no-kvm-irqchip didn't make any difference. I've browsed the archives for hints, but no luck. Details: Host (64): Linux 2.6.26.3 #6 SMP PREEMPT Sun Aug 31 16:00:51 CEST 2008 x86_64 AMD Phenom(tm) 9850 Quad-Core Processor AuthenticAMD GNU/Linux single CPU/quad core. fs on image partition: XFS Gentoo ~amd64, kvm compiled on host system. Guest (32): Linux 2.6.26.3vm #4 Tue Aug 26 17:29:00 CEST 2008 i686 QEMU Virtual CPU version 0.9.1 AuthenticAMD GNU/Linux Gentoo x86 command line: kvm -m 1G -drive file=test.qcow2,if=virtio,boot=on -localtime -net nic,macaddr=DE:AD:BE:EF:15:5,model=virtio -net tap fs on image: ext3 kvm-img info of image that show corruption: image: test.qcow2 file format: qcow2 virtual size: 10G (10737418240 bytes) disk size: 103M cluster_size: 4096 backing file: gentoo-i386-virtio.qcow2 (actual path: gentoo-i386-virtio.qcow2) kvm-img info of working image: image: gentoo-i386-virtio.img file format: raw virtual size: 10G (10737418240 bytes) disk size: 4.5G virtio partitions are in use on guest machine Let me know it other details are needed. Thanks for any answer. ---------------------------------------------------------------------- >Comment By: Avi Kivity (avik) Date: 2009-08-10 15:22 Message: qcow2 problems should be fixed in kvm-88. ---------------------------------------------------------------------- Comment By: Fabio Coatti (cova) Date: 2008-09-08 00:46 Message: Logged In: YES user_id=220554 Originator: YES Many thanks for the quick answer. Not sure about how to get kvm head, I've used http://people.qumranet.com:8888/avi/snapshots/kvm-snapshot-20080906.tar.gz The result is the same: fs corruption using qcow2 image. as suggested, I've tried with ide emulation and it seems that I'm unable to reproduce the bug, with this command line: kvm -m 1G test-hda.qcow2 -localtime -net nic,macaddr=DE:AD:BE:EF:15:5,model=rtl8139 -net tap all goes fine: 3 kernel compilation on the same image, rebooting each time, without glitches. maybe it's related to virtio disk driver? Of course I'm available for other info and tests, if needed. Thanks. ---------------------------------------------------------------------- Comment By: Dor Laor (thekozmo) Date: 2008-09-07 23:39 Message: Logged In: YES user_id=2124464 Originator: NO Hi there, Can you first check against kvm head, there was a missing tlb flush that was fixed. Second, can you replace virtio with scsi/ide and check if the bug still exist? 10x ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2099075&group_id=180599 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
