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Bug 188080

Summary: kernel dm snapshots: Incorrect processing of incorrect chunk size
Product: Red Hat Enterprise Linux 4 Reporter: Alasdair Kergon <agk>
Component: kernelAssignee: Alasdair Kergon <agk>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron, jbrassow, markmc
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 23:04:14 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    
Attachments:
Description Flags
dm-snapshot-unify-chunk_size.patch none

Description Alasdair Kergon 2006-04-05 21:08:10 UTC 
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 21:08:10 UTC 
Created attachment 127371 [details]
dm-snapshot-unify-chunk_size.patch
Comment 4 Jason Baron 2006-05-09 17:16:38 UTC 
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 23:04:17 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