From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267619AbUBTB2W (ORCPT ); Thu, 19 Feb 2004 20:28:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267684AbUBTB2E (ORCPT ); Thu, 19 Feb 2004 20:28:04 -0500 Received: from fw.osdl.org ([65.172.181.6]:39071 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S267591AbUBTBZw (ORCPT ); Thu, 19 Feb 2004 20:25:52 -0500 Date: Thu, 19 Feb 2004 17:26:56 -0800 From: Andrew Morton To: Nick Piggin Cc: miquels@cistron.nl, axboe@suse.de, linux-lvm@sistina.com, linux-kernel@vger.kernel.org, thornber@redhat.com Subject: Re: [PATCH] per process request limits (was Re: IO scheduler, queue depth, nr_requests) Message-Id: <20040219172656.77c887cf.akpm@osdl.org> In-Reply-To: <40355F03.9030207@cyberone.com.au> References: <20040216133047.GA9330@suse.de> <20040217145716.GE30438@traveler.cistron.net> <20040218235243.GA30621@drinkel.cistron.nl> <20040218172622.52914567.akpm@osdl.org> <20040219021159.GE30621@drinkel.cistron.nl> <20040218182628.7eb63d57.akpm@osdl.org> <20040219101519.GG30621@drinkel.cistron.nl> <20040219101915.GJ27190@suse.de> <20040219205907.GE32263@drinkel.cistron.nl> <40353E30.6000105@cyberone.com.au> <20040219235303.GI32263@drinkel.cistron.nl> <40355F03.9030207@cyberone.com.au> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i586-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Nick Piggin wrote: > > Even with this patch, it might still be a good idea to allow > pdflush to disregard the limits... Has it been confirmed that pdflush is blocking in get_request_wait()? I guess that can happen very occasionally because we don't bother with any locking around there but if it's happening a lot then something is bust.