Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262738AbVAFFhz (ORCPT ); Thu, 6 Jan 2005 00:37:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262739AbVAFFhz (ORCPT ); Thu, 6 Jan 2005 00:37:55 -0500 Received: from fw.osdl.org ([65.172.181.6]:16816 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262738AbVAFFhi (ORCPT ); Thu, 6 Jan 2005 00:37:38 -0500 Date: Wed, 5 Jan 2005 21:37:04 -0800 From: Andrew Morton To: Andrea Arcangeli Cc: nickpiggin@yahoo.com.au, riel@redhat.com, marcelo.tosatti@cyclades.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH][5/?] count writeback pages in nr_scanned Message-Id: <20050105213704.0282316f.akpm@osdl.org> In-Reply-To: <20050106052507.GR4597@dualathlon.random> References: <20050105173624.5c3189b9.akpm@osdl.org> <41DCB577.9000205@yahoo.com.au> <20050105202611.65eb82cf.akpm@osdl.org> <41DCC014.80007@yahoo.com.au> <20050105204706.0781d672.akpm@osdl.org> <20050106045932.GN4597@dualathlon.random> <20050105210539.19807337.akpm@osdl.org> <20050106051707.GP4597@dualathlon.random> <41DCCA68.3020100@yahoo.com.au> <20050106052507.GR4597@dualathlon.random> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i386-redhat-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 Content-Length: 658 Lines: 18 Andrea Arcangeli wrote: > > 2) we won't need unreliable anti-deadlock timeouts anymore The timeouts are for: a) A fallback for backing stores which don't wake up waiters in blk_congestion_wait() (eg: NFS). b) handling the race case where the request queue suddenly goes empty before the sleeper gets onto the waitqueue. It can probably be removed with some work, and additional locking. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/