[2.6.23] tasks stuck in running state?

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From: Jeff Garzik
Date: Friday, October 19, 2007 - 2:39 pm

On my main devel box, vanilla 2.6.23 on x86-64/Fedora-7, I'm seeing a 
certain behavior at least once a day.  I'll start a kernel build (make 
-sj5 on this box), and it will "hang" in the following way:


Specifically, the symptom is a process, often a simple one like cat(1) 
or rm(1) or somewhere in check-headers, will stay in the running state, 
accumulating CPU time.

If I Ctrl-C the build, and start over, the build will normally -not- get 
stuck at the same point, but proceed to chew through one of a bazillion 
allmodconfig builds.

I also see this occasionally on my main workstation (also 
2.6.23/x86-64/Fedora-7), though not as frequently.

This is a new behavior since the new scheduler was merged... I think.

Nothing more concrete to report at this time.  I cannot easily reproduce 
the behavior, as it happens [apparently] randomly sometime during the 
day.  Generally, the files these programs are dealing with are -always- 
in the pagecache, if that makes any difference.

	Jeff


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Messages in current thread:
[2.6.23] tasks stuck in running state?, Jeff Garzik, (Fri Oct 19, 2:39 pm)
Re: [2.6.23] tasks stuck in running state?, Chuck Ebbert, (Fri Oct 19, 2:53 pm)
Re: [2.6.23] tasks stuck in running state?, Jeff Garzik, (Fri Oct 19, 3:03 pm)
Re: [2.6.23] tasks stuck in running state?, Chuck Ebbert, (Fri Oct 19, 3:18 pm)
Re: [2.6.23] tasks stuck in running state?, David Miller, (Fri Oct 19, 5:01 pm)
Re: [2.6.23] tasks stuck in running state?, Ray Lee, (Fri Oct 19, 6:08 pm)
Re: [2.6.23] tasks stuck in running state?, Chuck Ebbert, (Sun Oct 21, 8:59 am)
Re: [2.6.23] tasks stuck in running state?, Dmitry Adamushko, (Sun Oct 21, 10:25 am)
Re: [2.6.23] tasks stuck in running state?, Dmitry Adamushko, (Sun Oct 21, 10:34 am)
Re: [2.6.23] tasks stuck in running state?, David Miller, (Sun Oct 21, 12:52 pm)
ext3 deadlock or Re: [2.6.23] tasks stuck in running state?, Guennadi Liakhovetski, (Sun Oct 21, 1:11 pm)