From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support) Date: Sat, 15 Sep 2007 01:44:49 -0700 Message-ID: <20070915014449.4f9cdb51.akpm@linux-foundation.org> References: <20070911060349.993975297@sgi.com> <200709110452.20363.nickpiggin@yahoo.com.au> <20070911121225.GE13132@lazybastard.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Nick Piggin , Christoph Lameter , andrea@suse.de, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Mel Gorman , William Lee Irwin III , David Chinner , Jens Axboe , Badari Pulavarty , Maxim Levitsky , Fengguang Wu , swin wang , totty.lu@gmail.com, hugh@veritas.com To: =?ISO-8859-1?B?SvZybg==?= Engel Return-path: Received: from smtp2.linux-foundation.org ([207.189.120.14]:39039 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750832AbXIOIqH convert rfc822-to-8bit (ORCPT ); Sat, 15 Sep 2007 04:46:07 -0400 In-Reply-To: <20070911121225.GE13132@lazybastard.org> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Tue, 11 Sep 2007 14:12:26 +0200 J=F6rn Engel wrote= : > While I agree with your concern, those numbers are quite silly. The > chances of 99.8% of pages being free and the remaining 0.2% being > perfectly spread across all 2MB large_pages are lower than those of S= HA1 > creating a collision. Actually it'd be pretty easy to craft an application which allocates se= ven pages for pagecache, then one for , then seven for pagecache= , then one for , etc. I've had test apps which do that sort of thing accidentally. The resul= t wasn't pretty. - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html