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Message-Id: <200709111530.16136.nickpiggin@yahoo.com.au>
Date: Tue, 11 Sep 2007 15:30:15 +1000
From: Nick Piggin <nickpiggin@...oo.com.au>
To: Christoph Lameter <clameter@....com>
Cc: Mel Gorman <mel@....ul.ie>, andrea@...e.de,
torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
Mel Gorman <mel@...net.ie>,
William Lee Irwin III <wli@...omorphy.com>,
David Chinner <dgc@....com>,
Jens Axboe <jens.axboe@...cle.com>,
Badari Pulavarty <pbadari@...il.com>,
Maxim Levitsky <maximlevitsky@...il.com>,
Fengguang Wu <fengguang.wu@...il.com>,
swin wang <wangswin@...il.com>, totty.lu@...il.com,
hugh@...itas.com, joern@...ybastard.org
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)
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.
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