Bug 78240 - reiserfs writes cause huge load average
reiserfs writes cause huge load average
Status: CLOSED CURRENTRELEASE
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
7.1
athlon Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brian Brock
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Depends On:
Blocks:
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Reported: 2002-11-20 10:24 EST by Stuart Teasdale
Modified: 2008-08-01 12:22 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2004-09-30 11:40:13 EDT
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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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