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Subject: Re: [patch] enable PREEMPT_BKL on !PREEMPT+SMP too
From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@osdl.org>, Arjan van de Ven <arjanv@infradead.org>,
       linux-kernel@vger.kernel.org
In-Reply-To: <20050526111742.GA18272@elte.hu>
References: <20050526111742.GA18272@elte.hu>
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Date: Thu, 26 May 2005 12:27:46 -0400
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On Thu, 2005-05-26 at 13:17 +0200, Ingo Molnar wrote:
> It might introduce
> performance regressions as well, if any performance-critical code uses
> the BKL heavily and gets overscheduled due to the semaphore. I very much
> hope there is no such performance-critical codepath left though.

A write-intensive benchmark on a reiser3 FS is probably a good place to
start testing.

Lee