* [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system
@ 2019-11-26 9:24 bugzilla-daemon
2019-11-26 11:48 ` [Bug 205655] " bugzilla-daemon
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bugzilla-daemon @ 2019-11-26 9:24 UTC (permalink / raw)
To: kvm
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@kernel-bugs.osdl.org
Reporter: denis.ovsyannikov@gmail.com
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
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* [Bug 205655] kvm with cache=none and btrfs -> corrupted file system
2019-11-26 9:24 [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system bugzilla-daemon
@ 2019-11-26 11:48 ` bugzilla-daemon
2019-12-03 9:08 ` [Bug 205655] New: " Stefan Hajnoczi
2019-12-03 9:08 ` [Bug 205655] " bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2019-11-26 11:48 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=205655
--- Comment #1 from denis.ovsyannikov@gmail.com ---
I made a mistake, directsync mode also corrupts data
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* Re: [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system
2019-11-26 9:24 [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system bugzilla-daemon
2019-11-26 11:48 ` [Bug 205655] " bugzilla-daemon
@ 2019-12-03 9:08 ` Stefan Hajnoczi
2019-12-03 9:08 ` [Bug 205655] " bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: Stefan Hajnoczi @ 2019-12-03 9:08 UTC (permalink / raw)
To: bugzilla-daemon; +Cc: kvm
[-- Attachment #1: Type: text/plain, Size: 1669 bytes --]
On Tue, Nov 26, 2019 at 09:24:48AM +0000, bugzilla-daemon@bugzilla.kernel.org 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@kernel-bugs.osdl.org
> Reporter: denis.ovsyannikov@gmail.com
> 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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^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug 205655] kvm with cache=none and btrfs -> corrupted file system
2019-11-26 9:24 [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system bugzilla-daemon
2019-11-26 11:48 ` [Bug 205655] " bugzilla-daemon
2019-12-03 9:08 ` [Bug 205655] New: " Stefan Hajnoczi
@ 2019-12-03 9:08 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2019-12-03 9:08 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=205655
--- Comment #2 from Stefan Hajnoczi (stefanha@gmail.com) ---
On Tue, Nov 26, 2019 at 09:24:48AM +0000, bugzilla-daemon@bugzilla.kernel.org
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@kernel-bugs.osdl.org
> Reporter: denis.ovsyannikov@gmail.com
> 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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You are receiving this mail because:
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2019-11-26 9:24 [Bug 205655] New: kvm with cache=none and btrfs -> corrupted file system bugzilla-daemon
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2019-12-03 9:08 ` [Bug 205655] New: " Stefan Hajnoczi
2019-12-03 9:08 ` [Bug 205655] " bugzilla-daemon
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