Bug 704409 - guest's snapshot got kernel panic after dd a big file then shutdown
guest's snapshot got kernel panic after dd a big file then shutdown
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kvm (Show other bugs)
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: Kevin Wolf
Virtualization Bugs
Depends On:
Blocks: Rhel5KvmTier3
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Reported: 2011-05-12 23:43 EDT by Golita Yue
Modified: 2011-08-01 12:26 EDT (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2011-08-01 12:26:19 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
guest-kernel-panic-serial.log (19.63 KB, application/octet-stream)
2011-05-12 23:43 EDT, Golita Yue
no flags Details

  None (edit)
Description Golita Yue 2011-05-12 23:43:11 EDT
Created attachment 498679 [details]

Description of problem:
Guest(rhel4.9-64) kernel panic during shutdown.

Version-Release number of selected component (if applicable):
kernel 2.6.18-259.el5

How reproducible:
only once

Steps to Reproduce:
1. create a snapshot 
#qemu-img create -b RHEL-4.9-64.raw -f qcow2 sn1.qcow2

2. boot up new created sn1.qcow2 with cmd
******** cmd line ********
#/usr/libexec/qemu-kvm -drive file='sn1.qcow2',index=0,if=ide,media=disk,cache=none,format=qcow2 -net nic,vlan=0,model=e1000,macaddr='9a:ee:93:df:01:06' -net tap,vlan=0,ifname='t0-091953-J5dh',script='qemu-ifup-switch',downscript='no' -m 32768 -smp 8,cores=1,threads=1,sockets=8 -cpu qemu64,+sse2 -soundhw ac97 -spice port=8000,disable-ticketing -qxl 1 -rtc-td-hack -M rhel5.6.0 -boot c  -usbdevice tablet -no-kvm-pit-reinjection

3. create big file in guest
#dd if=/dev/zero of=/tmp/file_sn1 bs=1M count=1000

4. shutdown guest
#shutdown -h now
Actual results:
guest kernel panic

Expected results:
guest shutdown normally

Additional info:
Tested 20 times, hit this bug only once.
Comment 3 Kevin Wolf 2011-07-29 03:51:14 EDT
Doesn't look related to the snapshot at all. I suspect this was only a coincidence.

Golita, did you experience the problem again since then?
Comment 4 Kevin Wolf 2011-08-01 12:26:19 EDT
No response, so I'm assuming that it really happened only once and is most likely unrelated to qemu. Closing.

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