Bug 78240 - reiserfs writes cause huge load average
Summary: reiserfs writes cause huge load average
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 7.1
Hardware: athlon
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2002-11-20 15:24 UTC by Stuart Teasdale
Modified: 2008-08-01 16:22 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2004-09-30 15:40:13 UTC


Attachments (Terms of Use)

Description Stuart Teasdale 2002-11-20 15:24:16 UTC
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 15:40:13 UTC
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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