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From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
To: Richard Henderson <rth@twiddle.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] 2.4.4 alpha semaphores optimization
Date: Sun, 6 May 2001 10:55:19 +0400	[thread overview]
Message-ID: <20010506105519.A7562@jurassic.park.msu.ru> (raw)
In-Reply-To: <20010503194747.A552@jurassic.park.msu.ru> <20010504141240.A11122@twiddle.net> <20010505175547.A2302@jurassic.park.msu.ru>
In-Reply-To: <20010505175547.A2302@jurassic.park.msu.ru>; from ink@jurassic.park.msu.ru on Sat, May 05, 2001 at 05:55:47PM +0400

> > If you do
> > (perhaps to coordinate with devices) then the barriers are required.
> 
> For IO space access mb's are required, but ll/sc are of no use, AFAIK.

Ugh. You are right, of course. I forgot that drivers are also using
atomic.h, and the intelligent device could be counted as another CPU
to some degree...

Thanks for the __builtin_expect fix!

Ivan.

  reply	other threads:[~2001-05-06  6:56 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-05-03 15:47 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
2001-05-05 13:55   ` Ivan Kokshaysky
2001-05-06  6:55     ` Ivan Kokshaysky [this message]
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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