Bug 78240 – reiserfs writes cause huge load average

Bug 78240 - reiserfs writes cause huge load average

Summary:	reiserfs writes cause huge load average

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	7.1
Hardware:	athlon Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Arjan van de Ven
QA Contact:	Brian Brock
Docs Contact:

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Depends On:
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Reported:	2002-11-20 10:24 EST by Stuart Teasdale
Modified:	2008-08-01 12:22 EDT (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
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Environment:
Last Closed:	2004-09-30 11:40:13 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Stuart Teasdale 2002-11-20 10:24:16 EST

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.1) Gecko/20020827

Description of problem:
When writing a large file to a reiserfs partition the load average climbs
rapidly for the duration of the write, typically getting past 8 for a .5 gig
file, and blocks any other IO tasks occuring on the machine. CPU loading remains
minial according to top

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.dd if=/dev/zero of=/some/reiserfs/fs/temp count=1000000
2.
3.
	

Actual Results:  Load average climbs to typically 5-10 and io tasks get blocked

Expected Results:  On a stock kernel or on a redhat kernel writing to ext2 the
load average climbs to approximately 1 and other IO tasks remain responsive.

Additional info:

The problem seems to occur with both kernel 2.4.9-31 and 2.4.18-17.7, but a
stock 2.4.19 kernel appears to show the correct behavior, as does a debian box
with  a debian standard 2.4.18 kernel.

Comment 1 Bugzilla owner 2004-09-30 11:40:13 EDT

Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem
persists.

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/

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