Bug 242068 - device-mapper mirror: Blockable function [clear_region] called inside spinlock
Summary: device-mapper mirror: Blockable function [clear_region] called inside spinlock
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel   
(Show other bugs)
Version: 4.5
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Jonathan Earl Brassow
QA Contact: Martin Jenner
Depends On:
Blocks: 242069
TreeView+ depends on / blocked
Reported: 2007-06-01 14:53 UTC by Jonathan Earl Brassow
Modified: 2007-11-17 01:14 UTC (History)
1 user (show)

Fixed In Version: RHBA-2007-0791
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-11-15 16:27:59 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0791 normal SHIPPED_LIVE Updated kernel packages available for Red Hat Enterprise Linux 4 Update 6 2007-11-14 18:25:55 UTC

Description Jonathan Earl Brassow 2007-06-01 14:53:22 UTC
From drivers/md/dm-log.h:
         * Mark an area as clean or dirty.  These functions may
         * block, though for performance reasons blocking should
         * be extremely rare (eg, allocating another chunk of
         * memory for some reason).
        void (*mark_region)(struct dirty_log *log, region_t region);
        void (*clear_region)(struct dirty_log *log, region_t region);

These function rarely block, but they could.  Would be a good idea
to move the clear_region call in rh_update_states outside the
spin lock.

Comment 1 RHEL Product and Program Management 2007-06-01 15:27:01 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

Comment 2 Jonathan Earl Brassow 2007-06-01 18:25:59 UTC
assinged -> post

Comment 3 Jason Baron 2007-06-29 22:19:30 UTC
committed in stream U6 build 55.15. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 7 errata-xmlrpc 2007-11-15 16:27:59 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.


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