From: Richard Henderson <rth@twiddle.net>
To: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] 2.4.4 alpha semaphores optimization
Date: Fri, 4 May 2001 14:12:40 -0700 [thread overview]
Message-ID: <20010504141240.A11122@twiddle.net> (raw)
In-Reply-To: <20010503194747.A552@jurassic.park.msu.ru>
In-Reply-To: <20010503194747.A552@jurassic.park.msu.ru>; from ink@jurassic.park.msu.ru on Thu, May 03, 2001 at 07:47:47PM +0400
On Thu, May 03, 2001 at 07:47:47PM +0400, Ivan Kokshaysky wrote:
> - removed some mb's for non-SMP
This isn't correct. Either you need atomic updates or you don't.
If you don't, then you shouldn't be using ll/sc at all. If you do
(perhaps to coordinate with devices) then the barriers are required.
> - removed non-inline up()/down_xx() when semaphore/waitqueue debugging
> isn't enabled.
They should still be exported for module compatibility.
r~
next prev parent reply other threads:[~2001-05-04 21:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-03 15:47 [patch] 2.4.4 alpha semaphores optimization Ivan Kokshaysky
2001-05-03 17:28 ` Andrea Arcangeli
2001-05-04 9:15 ` Ivan Kokshaysky
2001-05-04 14:33 ` Andrea Arcangeli
2001-05-04 17:02 ` Ivan Kokshaysky
2001-05-04 17:16 ` Andrea Arcangeli
2001-05-04 9:22 ` David Howells
2001-05-04 9:54 ` Ivan Kokshaysky
2001-05-04 16:46 ` Ivan Kokshaysky
2001-05-04 21:12 ` Richard Henderson [this message]
2001-05-05 13:55 ` Ivan Kokshaysky
2001-05-06 6:55 ` Ivan Kokshaysky
2001-05-04 21:13 ` Richard Henderson
2001-05-05 14:17 ` Ivan Kokshaysky
2001-05-05 17:06 ` __builtin_expect vs inlining Richard Henderson
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