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From: Ingo Molnar <mingo@elte.hu>
To: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: dmitry.adamushko@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -cfs] Fix cpu_load calculation error
Date: Tue, 19 Jun 2007 11:01:20 +0200	[thread overview]
Message-ID: <20070619090120.GC5746@elte.hu> (raw)
In-Reply-To: <20070618170114.GA21037@linux.vnet.ibm.com>


* Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> wrote:

> Ingo/Dmitry,
> 	I am resending the patch to fix cpu_load calculation error in 
> cfs v17, this time CCing lkml.

> v17 cpu_load calculation didn't take into account that a class's 
> delta_exec/fair may be stale because it could not get an opportunity 
> to run. This can lead to incorrect calculation of a class's load. This 
> patch removes load tracking from individual classes and instead 
> introduces a global per-cpu load tracking common to all classes in 
> kernel/sched.c itself.
> 
> Thanks to Dmitry for suggesting this idea.
> 
> Signed-off-by : Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>

thanks Srivatsa, i've applied this to the -v18 tree and everything's 
looking good so far!

	Ingo

      parent reply	other threads:[~2007-06-19  9:01 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-18 17:01 [PATCH -cfs] Fix cpu_load calculation error Srivatsa Vaddagiri
2007-06-18 17:03 ` Srivatsa Vaddagiri
2007-06-19  9:01 ` Ingo Molnar [this message]

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