From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 25 May 2001 23:12:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 25 May 2001 23:12:41 -0400 Received: from penguin.e-mind.com ([195.223.140.120]:21562 "EHLO penguin.e-mind.com") by vger.kernel.org with ESMTP id ; Fri, 25 May 2001 23:12:29 -0400 Date: Sat, 26 May 2001 05:11:56 +0200 From: Andrea Arcangeli To: Ben LaHaise Cc: Linus Torvalds , Alan Cox , Rik van Riel , linux-kernel@vger.kernel.org Subject: Re: Linux-2.4.5 Message-ID: <20010526051156.S9634@athlon.random> In-Reply-To: <20010526043835.R9634@athlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ; from bcrl@redhat.com on Fri, May 25, 2001 at 10:49:38PM -0400 X-GnuPG-Key-URL: http://e-mind.com/~andrea/aa.gnupg.asc X-PGP-Key-URL: http://e-mind.com/~andrea/aa.asc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 25, 2001 at 10:49:38PM -0400, Ben LaHaise wrote: > Highmem. 0 free pages in ZONE_NORMAL. Now try to allocate a buffer_head. That's a longstanding deadlock, it was there the first time I read fs/buffer.c, nothing related to highmem, we have it in 2.2 too. Also getblk is deadlock prone in a smiliar manner. Can you try to simply change NR_RESERVED to say 200*MAX_BUF_PER_PAGE and see if it makes a difference? The unused_list logic doesn't give a guarantee either and it's one of the "hiding" logics, but it was working pretty well usually, maybe something changed that needs more than 2 pages (16 bh) reserved? Andrea