linux-kernel - Re: [00/41] Large Blocksize Support V7 (adds memmap support)

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Message-Id: <200709190353.49570.nickpiggin@yahoo.com.au>
Date:	Wed, 19 Sep 2007 03:53:48 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Christoph Lameter <clameter@....com>, Mel Gorman <mel@...net.ie>,
	andrea@...e.de, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	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 19 September 2007 04:30, Linus Torvalds wrote:
> On Tue, 18 Sep 2007, Nick Piggin wrote:
> > ROFL! Yeah of course, how could I have forgotten about our trusty OOM
> > killer as the solution to the fragmentation problem? It would only have
> > been funnier if you had said to reboot every so often when memory gets
> > fragmented :)
>
> Can we please stop this *idiotic* thread.
>
> Nick, you and some others seem to be arguing based on a totally flawed
> base, namely:
>  - we can guarantee anything at all in the VM
>  - we even care about the 16kB blocksize
>  - second-class citizenry is "bad"
>
> The fact is, *none* of those things are true. The VM doesn't guarantee
> anything, and is already very much about statistics in many places. You
> seem to be arguing as if Christoph was introducing something new and
> unacceptable, when it's largely just more of the same.

I will stop this idiotic thread.

However, at the VM and/or vm/fs things we had, I was happy enough
for this thing of Christoph's to get merged. Actually I even didn't care
if it had mmap support, so long as it solved their problem.

But a solution to the general problem of VM and IO scalability, it is not.
IMO.


> And the fact is, nobody but SGI customers would ever want the 16kB
> blocksize. IOW - NONE OF THIS MATTERS!

Maybe. Maybe not.


> Can you guys stop this inane thread already, or at least take it private
> between you guys, instead of forcing everybody else to listen in on your
> flamefest.

Will do. Sorry.
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