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From: Darren Hart <dvhltc@us.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
	RT <linux-rt-users@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	john stultz <johnstul@us.ibm.com>
Subject: Re: [PATCH RT] fix migrating softirq [cause of network hang]
Date: Thu, 14 Jun 2007 00:02:17 -0700	[thread overview]
Message-ID: <200706140002.17411.dvhltc@us.ibm.com> (raw)
In-Reply-To: <1181738836.10408.54.camel@localhost.localdomain>

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

  reply	other threads:[~2007-06-14  7:02 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-13 12:47 Steven Rostedt
2007-06-14  7:02 ` Darren Hart [this message]
2007-06-14 13:08   ` Steven Rostedt
2007-06-13 21:14 Shane
2007-06-13 21:26 ` Steven Rostedt
2007-06-13 22:20   ` Shane
2007-06-13 23:55     ` Steven Rostedt

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