From: Theodore Tso Subject: Re: [RFC] Parallelize IO for e2fsck Date: Mon, 28 Jan 2008 14:56:33 -0500 Message-ID: <20080128195633.GB20528@mit.edu> References: <70b6f0bf0801161322k2740a8dch6a0d6e6e112cd2d0@mail.gmail.com> <70b6f0bf0801161330y46ec555m5d4994a1eea7d045@mail.gmail.com> <20080121230041.GL3180@webber.adilger.int> <20080122033830.GR155259@sgi.com> <3673.1200975438@turing-police.cc.vt.edu> <20080122070050.GM3180@webber.adilger.int> <20080122144052.GC17804@mit.edu> <20080128193005.GC4032@ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Valdis.Kletnieks@vt.edu, David Chinner , Valerie Henson , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, Andreas Dilger , Ric Wheeler To: Pavel Machek Return-path: Received: from BISCAYNE-ONE-STATION.MIT.EDU ([18.7.7.80]:58473 "EHLO biscayne-one-station.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752369AbYA1T5U (ORCPT ); Mon, 28 Jan 2008 14:57:20 -0500 Content-Disposition: inline In-Reply-To: <20080128193005.GC4032@ucw.cz> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Jan 28, 2008 at 07:30:05PM +0000, Pavel Machek wrote: > > As user pages are always in highmem, this should be easy to decide: > only send SIGDANGER when highmem is full. (Yes, there are > inodes/dentries/file descriptors in lowmem, but I doubt apps will > respond to SIGDANGER by closing files). Good point; for a system with at least (say) 2GB of memory, that definitely makes sense. For a system with less than 768 megs of memory (how quaint, but it wasn't that long ago this was a lot of memory :-), there wouldn't *be* any memory in highmem at all.... - Ted