From: Darren Hart <dvhltc@us.ibm.com>
Organization: IBM Linux Technology Center
To: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH RT] fix migrating softirq [cause of network hang]
Date: Thu, 14 Jun 2007 00:02:17 -0700
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On Wednesday 13 June 2007 05:47:16 Steven Rostedt wrote:

> This patch temporarily binds the hardirq thread on the CPU that it runs
> the softirqs on.  With this patch I have not seen my network hang. I ran
> it over night, doing compiles and such, and it seems fine. I would be
> able to cause the hang with various loads within a minute, now I can't
> cause it after several minutes.
>
> I'm assuming that this fix may fix other bugs too.
>

I ran 2.6.21-rt10 + this patch with kernbench and then loops building a kernel 
(which would previously rapidly exhaust memory).  It successfully built 400 
kernels with "make -j 32" on an 8 opteron machine with 8 GB of RAM and has so 
far completed 25 "make -j" on the same system.  Looks like a winner to me so 
far.

Thanks,

-- 
Darren Hart
IBM Linux Technology Center
Realtime Linux Team
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