linux-kernel - Re: [git pull] cpus4096 tree, part 3

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Message-ID: <20090126232139.GA29561@elte.hu>
Date:	Tue, 27 Jan 2009 00:21:39 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Ying Han <yinghan@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, npiggin@...e.de,
	linux-arch@...r.kernel.org, torvalds@...ux-foundation.org,
	rusty@...tcorp.com.au, travis@....com,
	linux-kernel@...r.kernel.org, venkatesh.pallipadi@...el.com,
	suresh.b.siddha@...el.com, arjan@...radead.org, hpa@...or.com,
	tglx@...utronix.de, Mike Waychison <mikew@...gle.com>
Subject: Re: [git pull] cpus4096 tree, part 3

* Ying Han <yinghan@...gle.com> wrote:

> Thank you Ingo and Andrew for the comments. I will take a look into it 
> ASAP and updates it here.

Note, my objection wasnt a hard NAK - just an observation. If all things 
considered Andrew still favors the VM_FAULT_RETRY approach then that's 
fine too i guess.

It's just that a quick look gave me the feeling of a retry flag tacked on 
to an existing codepath [and all the micro-overhead and complexity that 
this brings], instead of a clean refactoring of pagefault handling 
functionality into a higher MM level retry loop.

So the alternative has to be looked at and rejected because it's 
technically inferior - not because it's more difficult to implement. 
(which it certainly is)

	Ingo
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