On Tue, Nov 26, 2019 at 09:24:48AM +0000, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=205655 > > Bug ID: 205655 > Summary: kvm with cache=none and btrfs -> corrupted file system > Product: Virtualization > Version: unspecified > Kernel Version: 4.9 4.19 5.3.12 > Hardware: x86-64 > OS: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: kvm > Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx > Reporter: denis.ovsyannikov@xxxxxxxxx > Regression: No > > hello > we use kvm with disks formatted in btrfs > when we turned on the mode "cache=none" > got data corruption > other modes work well > > we tested it on three servers and the result is always repeated > we tested on three operating systems(debian 9, debian 10, manjaro with kernel > 5.3.12) > > fstab > UUID=a49494f2-35a4-4a9c-aab0-1afc905c02c2 /mnt/test btrfs defaults 0 2 > > dmesg > [675174.887900] BTRFS error (device sde1): bdev /dev/sde1 errs: wr 0, rd 0, > flush 0, corrupt 2137, gen 0 > > [102857.086874] BTRFS warning (device sdc1): csum failed root 256 ino 260 off > 1735843840 csum 0xf69f8dd2 expected csum 0x96e71981 mirror 1 Please post your QEMU command-line. What is the storage configuration on the host? Which host file system are you using? Which image file format? What test is being run inside the guest? Is this a regression? Which host and guest kernel versions worked fine before?
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