Bug 215947

Summary:	kernel dm snapshot: fix metadata writing when suspending
Product:	Red Hat Enterprise Linux 4	Reporter:	Milan Broz <mbroz>
Component:	kernel	Assignee:	Milan Broz <mbroz>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.4	CC:	agk, christophe.varoqui, dwysocha, dzickus, egoggin, jbrassow, junichi.nomura, kueda, lmb, mbroz, pvrabec, rkenna, tranlan
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHBA-2007-0304	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-05-08 04:10:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Milan Broz 2006-11-16 14:52:08 UTC

+++ This bug was initially created as a clone of Bug #209843 +++
RHEL 4.5 clone

When suspending a device-mapper device, dm_suspend() sleeps until all
necessary I/O is completed.  This state is triggered by a callback from
persistent_commit().  But some I/O can still be issued *after* the
callback (to prepare the next metadata area for use if the current one is
full).  This patch delays the callback until after that I/O is complete.

Comment 1 RHEL Program Management 2006-11-16 15:04:20 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 3 Jason Baron 2006-12-07 20:38:04 UTC

committed in stream U5 build 42.29. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 6 Red Hat Bugzilla 2007-05-08 04:10:44 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2007-0304.html