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Re: 3rd version of R/W mmap_sem patch available

To: Rik van Riel <riel@conectiva.com.br>
Subject: Re: 3rd version of R/W mmap_sem patch available
From: Linus Torvalds <torvalds@transmeta.com>
Date: Mon, 19 Mar 2001 14:46:48 -0800 (PST)
cc: Mike Galbraith <mikeg@wen-online.de>, <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>
In-Reply-To: <Pine.LNX.4.33.0103192254130.1320-100000@duckman.distro.conectiva>
Sender: owner-linux-mm@kvack.org


> Now the code is beautiful and it might even be bugfree ;)

I'm applying this to my tree - I'm not exactly comfortable with this
during the 2.4.x timeframe, but at the same time I'm even less comfortable
with the current alternative, which is to make the regular semaphores
fairer (we tried it once, and the implementation had problems, I'm not
going to try that again during 2.4.x).

Besides, the fair semaphores would potentially slow things down, while
this potentially speeds things up. So.. It looks obvious enough.

		Linus

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References:
- 3rd version of R/W mmap_sem patch available
  - From: Rik van Riel <riel@conectiva.com.br>

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