From: Nick Piggin Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support) Date: Tue, 11 Sep 2007 15:30:15 +1000 Message-ID: <200709111530.16136.nickpiggin@yahoo.com.au> References: <20070911060349.993975297@sgi.com> <200709111453.42650.nickpiggin@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: Mel Gorman , 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, joern@lazybastard.org To: Christoph Lameter Return-path: Received: from smtp106.mail.mud.yahoo.com ([209.191.85.216]:23802 "HELO smtp106.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1758356AbXIKVLw (ORCPT ); Tue, 11 Sep 2007 17:11:52 -0400 In-Reply-To: Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Wednesday 12 September 2007 06:42, Christoph Lameter wrote: > On Tue, 11 Sep 2007, Nick Piggin wrote: > > > I guess you would have to run that without my targeted slab reclaim > > > patchset? Otherwise the slab that are in the way could be reclaimed and > > > you could not produce your test case. > > > > I didn't realise you had patches to move pinned dentries, radix tree > > nodes, task structs, page tables etc. Did I miss them in your last > > patchset? > > You did not mention that in your earlier text. Actually, I am pretty sure actually everything I mentioned was explicitly things that your patches do not handle. This was not a coincidence. > If these are issues then we > certainly can work on that. Could you first provide us some real failure > conditions so that we know that these are real problems? I think I would have as good a shot as any to write a fragmentation exploit, yes. I think I've given you enough info to do the same, so I'd like to hear a reason why it is not a problem.