Date: Thu, 15 Sep 2005 14:22:35 +0530
From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@osdl.org>, Nick Piggin <nickpiggin@yahoo.com.au>,
       Ingo Molnar <mingo@elte.hu>
Subject: [PATCH 3/3] CONFIG_NO_IDLE_HZ support patches - Scheduler Load balance
Message-ID: <20050915085235.GD10191@in.ibm.com>
Reply-To: vatsa@in.ibm.com
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This is more of a place holder for a problem discussed here:

http://lkml.org/lkml/2005/5/7/98

I am sending out this patch as a record of the load balance problem that
exists with NO_IDLE_HZ implementations.

Ingo had mentioned at OLS that it would be nice for any 
non-idle-cpu-waking-up-sleeping-cpu.patch to maintain the load
balancing algorithms intact. Basically the algorithm is offloaded
from a idle cpu to non-idle CPU and potentially lets the idle CPU
sleep for longer periods.

I have some ideas to guarantee that load balance algorithms are not
changed and yet let idle CPUs sleep as long as they want. But I have
been unable to implement them because of other pressing (read dyn-tick!)
work. Plan to work on such a patch and send out for discussions (& flames :)
as soon as possible.


-- 


Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017
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