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Bug 185991

Summary:	kernel dm: bio split bvec fix
Product:	Red Hat Enterprise Linux 4	Reporter:	Alasdair Kergon <agk>
Component:	kernel	Assignee:	Alasdair Kergon <agk>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jbaron, jbrassow
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHSA-2006-0575	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-08-10 22:49:09 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:
Bug Depends On:
Bug Blocks:	181409

Description Alasdair Kergon 2006-03-20 19:25:12 UTC

The code that handles bios that span table target boundaries by breaking
them up into smaller bios will not split an individual struct bio_vec
into more than two pieces.  Sometimes more than that are required.
 
This patch adds a loop to break the second piece up into as many
pieces as are necessary.

Comment 1 Jason Baron 2006-03-28 18:03:07 UTC

committed in stream u4 build 34.9. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 5 Red Hat Bugzilla 2006-08-10 22:49:14 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/RHSA-2006-0575.html