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Re: [patch] only-one-cache-query [was Re: [patch] arca-vm-2.2.5]

To: Mark Hemment <markhe@sco.COM>, Chuck Lever <cel@monkey.org>
Subject: Re: [patch] only-one-cache-query [was Re: [patch] arca-vm-2.2.5]
From: Andrea Arcangeli <andrea@e-mind.com>
Date: Wed, 7 Apr 1999 15:42:28 +0200 (CEST)
cc: linux-kernel@vger.rutgers.edu, linux-mm@kvack.org, Linus Torvalds <torvalds@transmeta.com>, "Stephen C. Tweedie" <sct@redhat.com>
In-Reply-To: <Pine.LNX.4.05.9904070243310.222-100000@laser.random>
Sender: owner-linux-mm@kvack.org

On Wed, 7 Apr 1999, Andrea Arcangeli wrote:

>I would ask Chuck to bench this my new code (it should be an obvious
>improvement).

Don't try it!! I have a bug in the code that is corrupting the cache
(noticed now).

I am working on a fix now.

I just noticed that kmem_cache_reap can theorically sleep in down() so
here I moved the cookie++ in do_try_to_free_pages(), it will be less
finegrined but safer... But I still have corruption so I am looking at
filemap.c now...

BTW, why kmem_cache_reap() need a serializing semaphore?

Andrea Arcangeli

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References:
- [patch] only-one-cache-query [was Re: [patch] arca-vm-2.2.5]
  - From: Andrea Arcangeli <andrea@e-mind.com>

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