From: Christoph Hellwig Subject: Re: Directories > 2GB Date: Tue, 10 Oct 2006 10:19:04 +0100 Message-ID: <20061010091904.GA395@infradead.org> References: <20061004165655.GD22010@schatzie.adilger.int> <452AC4BE.6090905@xfs.org> <20061010015512.GQ11034@melbourne.sgi.com> <452B0240.60203@xfs.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: David Chinner , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, xfs@oss.sgi.com Return-path: Received: from pentafluge.infradead.org ([213.146.154.40]:26513 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S965125AbWJJJTK (ORCPT ); Tue, 10 Oct 2006 05:19:10 -0400 To: Steve Lord Content-Disposition: inline In-Reply-To: <452B0240.60203@xfs.org> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Mon, Oct 09, 2006 at 09:15:28PM -0500, Steve Lord wrote: > Hi Dave, > > My recollection is that it used to default to on, it was disabled > because it needs to map the buffer into a single contiguous chunk > of kernel memory. This was placing a lot of pressure on the memory > remapping code, so we made it not default to on as reworking the > code to deal with non contig memory was looking like a major > effort. Exactly. The code works but tends to go OOM pretty fast at least when the dir blocksize code is bigger than the page size. I should give the code a spin on my ppc box with 64k pages if it works better there.