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Bug 46941 - Many D state hangs with 2.4.3-12
Many D state hangs with 2.4.3-12
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brock Organ
Depends On:
  Show dependency treegraph
Reported: 2001-07-02 07:55 EDT by Mike Bird
Modified: 2008-08-01 12:22 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-09-30 11:39:03 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Mike Bird 2001-07-02 07:55:24 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.77 [en] (Win95; U)

Description of problem:
A lightly loaded P3 server accumulates, on average, an additional process hanging in D state roughly every two hours.  Hangs have been 
running lilo, piping through pgp, the gunzip of wtmp.1.gz which emacs runs to determine boot time, and  installing kernel source.  Each of these 
has been seen more than once in 24 hour period before reverting to 2.4.2-2.  ps lax shows wchan of "end   " or "wait_o"; ps lnax shows numeric 
equivalents to be 8242d5 and 133178.  P3/600Mhz, 128MB RAM, VIA Apollo chipset, all drives s/w RAID-1 on IDE.  Ran fine on 2.2.12-2 
before and after 2.4.3-12.  Used rpm -Va and also switched back to 2.2.12-2, erased 2.4.3-12, then reinstalled - problem is not a bad copy of a 

How reproducible:

Steps to Reproduce:
1. See examples in description section

Additional info:

Once processes are in this state, reboot is nearly impossible.  Even "reboot -n -f" only works about a third of the time.
Comment 1 Need Real Name 2001-12-14 14:01:55 EST
I have also seen this using kernel-enterprise-2.4.3-12.  I can't duplicate it on demand, sometimes processes start blocking after a few days, a few 
weeks, or never ( ~50 days).  To date I haven't found a pattern.

Like you, ps lax shows wchan of end and wait_on_buffer; but I also have several "down" as well.

Hardware: p3/1Ghz, 1GB RAM, ASUS CUV4x-e mother board (VIA 694x chipset) all partitions SW RAID-1 on SCSI (aic7xxx driver).

Have you tried the more recent 2.4.9-12 kernel rpm?  I'll be upgrading this evening (hopefully).
Comment 2 Bugzilla owner 2004-09-30 11:39:03 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

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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