Bug 1264726 – During block-commit, stop guest, qemu will be unresponsive until commit job finished

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Bug 1264726 - During block-commit, stop guest, qemu will be unresponsive until commit job finished

Summary:	During block-commit, stop guest, qemu will be unresponsive until commit job f...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	qemu-kvm-rhev (Show other bugs)
Sub Component:
Version:	7.2
Hardware:	x86_64 Linux

Priority	medium Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Jeff Cody
QA Contact:	FuXiangChun
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2015-09-20 23:09 EDT by Pei Zhang
Modified:	2016-11-07 15:39 EST (History)
CC List:	10 users (show)

See Also:
Fixed In Version:	qemu 2.6
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-11-07 15:39:18 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Groups: None (edit)

Comment 1 Jeff Cody 2015-09-25 15:32:24 EDT

I have been able to reproduce this bug, by doing a block-commit on the active layer (as written up in the description).  This also does not occur upstream.

Looking in GDB, we are in aio_poll & bdrv_drain_all, but I have not pinpointed a particular patch as a fix.

This should not result in any data loss, as the job should run to completion, and even if stopped early the chain should still be intact.  However, it is a bad user experience, as it is not known how long it will be until QEMU is responsive again (and it could potentially be a long time, if there is a lot of data to commit).

Comment 5 Mike McCune 2016-03-28 18:44:25 EDT

This bug was accidentally moved from POST to MODIFIED via an error in automation, please see mmccune@redhat.com with any questions

Comment 7 FuXiangChun 2016-09-14 01:47:41 EDT

according to comment0.
verified this bug with qemu-kvm-rhev-2.6.0-24.

qemu-kvm active during block-mirror.

so, This bug is fixed.

Comment 9 errata-xmlrpc 2016-11-07 15:39:18 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2673.html

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