Bug 188080 – kernel dm snapshots: Incorrect processing of incorrect chunk size

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Bug 188080 - kernel dm snapshots: Incorrect processing of incorrect chunk size

Summary:	kernel dm snapshots: Incorrect processing of incorrect chunk size

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 4
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	4.0
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Alasdair Kergon
QA Contact:	Brian Brock
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	181409
	Show dependency tree / graph

Reported:	2006-04-05 17:08 EDT by Alasdair Kergon
Modified:	2007-11-30 17:07 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	RHSA-2006-0575
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2006-08-10 19:04:14 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
dm-snapshot-unify-chunk_size.patch (5.58 KB, patch) 2006-04-05 17:08 EDT, Alasdair Kergon	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2006:0575	normal	SHIPPED_LIVE	Important: Updated kernel packages available for Red Hat Enterprise Linux 4 Update 4	2006-08-10 00:00:00 EDT

Groups: None (edit)

Description Alasdair Kergon 2006-04-05 17:08:10 EDT

Persistent snapshots currently store a private copy of the chunk size.
Userspace also supplies the chunk size when loading a snapshot.
Ensure consistency by only storing the chunk_size in one place and
fix stuff up if the two differ.

Causes incorrect 'percent full' to be reported amongst other problems.

Comment 1 Alasdair Kergon 2006-04-05 17:08:10 EDT

Created attachment 127371 [details]
dm-snapshot-unify-chunk_size.patch

Comment 4 Jason Baron 2006-05-09 13:16:38 EDT

committed in stream U4 build 34.26. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 7 Red Hat Bugzilla 2006-08-10 19:04:17 EDT

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

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