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Message-ID: <20070824060403.GB24742@elte.hu>
Date: Fri, 24 Aug 2007 08:04:03 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Peter Williams <pwil3058@...pond.net.au>
Cc: Nick Piggin <npiggin@...e.de>,
"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: Reduce overhead in balance_tasks()
* Peter Williams <pwil3058@...pond.net.au> wrote:
> At the moment, balance_tasks() provides low level functionality for
> both
> move_tasks() and move_one_task() (indirectly) via the load_balance()
> function (in the sched_class interface) which also provides dual
> functionality. This dual functionality complicates the interfaces and
> internal mechanisms and makes the run time overhead of operations that
> are called with two run queue locks held.
>
> This patch addresses this issue and reduces the overhead of these
> operations.
hm, i like it, and added it to my queue (probably .24 material though),
but note that it increases .text and .data overhead:
text data bss dec hex filename
41028 37794 2168 80990 13c5e sched.o.before
41349 37826 2168 81343 13dbf sched.o.after
is that expected?
Ingo
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