From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dukat.scot.redhat.com (sct@dukat.scot.redhat.com [195.89.149.246]) by kvack.org (8.8.7/8.8.7) with ESMTP id KAA12991 for ; Tue, 6 Apr 1999 10:03:19 -0400 From: "Stephen C. Tweedie" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <14090.5138.562574.858572@dukat.scot.redhat.com> Date: Tue, 6 Apr 1999 15:02:58 +0100 (BST) Subject: Re: [patch] arca-vm-2.2.5 In-Reply-To: References: Sender: owner-linux-mm@kvack.org To: Chuck Lever Cc: Andrea Arcangeli , linux-kernel@vger.rutgers.edu, linux-mm@kvack.org, Stephen Tweedie List-ID: Hi, On Mon, 5 Apr 1999 17:31:43 -0400 (EDT), Chuck Lever said: > hmmm. wouldn't you think that hashing with the low order bits in the > offset would cause two different offsets against the same page to result > in the hash function generating different output? 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.) --Stephen -- 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/