From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from penguin.e-mind.com (penguin.e-mind.com [195.223.140.120]) by kvack.org (8.8.7/8.8.7) with ESMTP id NAA15001 for ; Tue, 6 Apr 1999 13:16:03 -0400 Date: Tue, 6 Apr 1999 19:16:12 +0200 (CEST) From: Andrea Arcangeli Subject: Re: [patch] arca-vm-2.2.5 In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Chuck Lever Cc: "Stephen C. Tweedie" , linux-kernel@vger.rutgers.edu, linux-mm@kvack.org List-ID: On Tue, 6 Apr 1999, Chuck Lever wrote: >> We always, always use page-aligned lookups for the page cache. >> (Actually there is one exception: certain obsolete a.out binaries, which >> are demand paged with the pages beginning at offset 1K into the binary. >> We don't support cache coherency for those and we don't support them at >> all on filesystems with a >1k block size. It doesn't impact on the hash >> issue.) > >i guess i'm confused then. what good does this change do: Hmm I think I misunderstood you point, Chuck. I thought you was complaining about the fact that some hash entry could be unused and other overloaded but I was just assuming that the offset is always page-aligned. I could write a simulation to check the hash function... Andrea Arcangeli -- To unsubscribe, send a message with 'unsubscribe linux-mm my@address' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/