From: "Stephen C. Tweedie" <sct@redhat.com>
To: Andrea Arcangeli <andrea@e-mind.com>
Cc: Chuck Lever <cel@monkey.org>,
"Stephen C. Tweedie" <sct@redhat.com>,
linux-kernel@vger.rutgers.edu, linux-mm@kvack.org
Subject: Re: [patch] arca-vm-2.2.5
Date: Tue, 6 Apr 1999 22:22:28 +0100 (BST) [thread overview]
Message-ID: <14090.31508.740918.361855@dukat.scot.redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.05.9904061934380.1017-100000@laser.random>
Hi,
On Tue, 6 Apr 1999 20:07:57 +0200 (CEST), Andrea Arcangeli
<andrea@e-mind.com> said:
> I was looking at the inode pointer part of the hash function and I think
> something like this should be better.
> -#define i (((unsigned long) inode)/(sizeof(struct inode) & ~ (sizeof(struct inode) - 1)))
> +#define i (((unsigned long) inode-PAGE_OFFSET)/(sizeof(struct inode) & ~ (sizeof(struct inode) - 1)))
This just ends up adding or subtracting a constant to the hash function,
so won't have any effect at all on the occupancy distribution of the
hash buckets.
--Stephen
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next prev parent reply other threads:[~1999-04-06 21:22 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-04-01 23:32 Andrea Arcangeli
1999-04-04 21:07 ` Chuck Lever
1999-04-05 0:22 ` Andrea Arcangeli
1999-04-05 13:23 ` Mark Hemment
1999-04-05 15:56 ` Andrea Arcangeli
1999-04-07 11:28 ` [patch] only-one-cache-query [was Re: [patch] arca-vm-2.2.5] Andrea Arcangeli
1999-04-07 13:06 ` Stephen C. Tweedie
1999-04-07 13:49 ` Andrea Arcangeli
1999-04-07 13:42 ` Andrea Arcangeli
1999-04-07 13:47 ` Ingo Molnar
1999-04-07 14:08 ` Andrea Arcangeli
1999-04-05 20:24 ` [patch] arca-vm-2.2.5 Horst von Brand
1999-04-05 23:25 ` Andrea Arcangeli
1999-04-05 23:37 ` Horst von Brand
1999-04-06 1:23 ` Andrea Arcangeli
1999-04-17 11:12 ` Andrea Arcangeli
1999-04-05 21:31 ` Chuck Lever
1999-04-06 0:15 ` Andrea Arcangeli
1999-04-06 2:14 ` Doug Ledford
1999-04-06 13:04 ` Andrea Arcangeli
1999-04-06 21:31 ` Stephen C. Tweedie
1999-04-06 22:27 ` Andrea Arcangeli
1999-04-07 12:27 ` Stephen C. Tweedie
1999-04-25 3:22 ` Chuck Lever
1999-04-06 5:52 ` Chuck Lever
1999-04-06 13:09 ` Andrea Arcangeli
1999-04-06 16:19 ` Eric W. Biederman
1999-04-06 20:26 ` Andrea Arcangeli
1999-04-07 5:00 ` Eric W. Biederman
1999-04-07 11:36 ` Andrea Arcangeli
1999-04-06 14:02 ` Stephen C. Tweedie
1999-04-06 15:38 ` Chuck Lever
1999-04-06 17:16 ` Andrea Arcangeli
1999-04-06 18:07 ` Andrea Arcangeli
1999-04-06 21:22 ` Stephen C. Tweedie [this message]
1999-04-06 22:19 ` Ingo Molnar
1999-04-06 22:40 ` David Miller
1999-04-06 22:49 ` Ingo Molnar
1999-04-06 22:53 ` David Miller
1999-04-07 15:59 ` Gabriel Paubert
1999-04-07 21:07 ` Arvind Sankar
1999-04-09 6:58 ` Eric W. Biederman
1999-04-09 9:27 ` Gabriel Paubert
1999-04-09 15:40 ` Eric W. Biederman
1999-04-08 8:09 ` Carlo Daffara
1999-04-06 22:31 ` Andrea Arcangeli
1999-04-06 20:47 ` Chuck Lever
1999-04-06 21:04 ` Andrea Arcangeli
1999-04-06 21:11 ` Stephen C. Tweedie
1999-04-06 14:00 ` Stephen C. Tweedie
1999-04-06 16:29 ` Andrea Arcangeli
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