Re: [patch 2/2] sched: reduce locking in periodic balancing

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To: Ingo Molnar <[email protected]>
Subject: Re: [patch 2/2] sched: reduce locking in periodic balancing
From: Nick Piggin <[email protected]>
Date: Wed, 03 Aug 2005 20:25:44 +1000
Cc: Andrew Morton <[email protected]>, "Siddha, Suresh B" <[email protected]>, linux-kernel <[email protected]>, Jack Steiner <[email protected]>
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Ingo Molnar wrote:

[...]

Thanks for the corrections.

btw., holding the runqueue lock during the initial scanning portion ofload-balancing is one of the top PREEMPT_RT critical paths on SMP. (It'snot bad, but it's one of the factors that makes SMP latencies higher.)


Good, I'm glad they will be of some immediate help.

Acked-by: Ingo Molnar <[email protected]>


Thanks.

--
SUSE Labs, Novell Inc.

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References:
- [patch 0/2] sched: reduce locking
  - From: Nick Piggin <[email protected]>
- [patch 1/2] sched: reduce locking in newidle balancing
  - From: Nick Piggin <[email protected]>
- [patch 2/2] sched: reduce locking in periodic balancing
  - From: Nick Piggin <[email protected]>
- Re: [patch 2/2] sched: reduce locking in periodic balancing
  - From: Ingo Molnar <[email protected]>

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