linux-kernel - Re: [patch 0/5] Support for sanitization flag in low-level page allocator

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Message-ID: <20090530090513.GO29711@oblivion.subreption.com>
Date:	Sat, 30 May 2009 02:05:13 -0700
From:	"Larry H." <research@...reption.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, Ingo Molnar <mingo@...e.hu>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...l.org>, linux-mm@...ck.org,
	Ingo Molnar <mingo@...hat.com>, pageexec@...email.hu,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch 0/5] Support for sanitization flag in low-level page
	allocator

On 10:57 Sat 30 May     , Pekka Enberg wrote:
> Larry H. wrote:
>> Furthermore, selective clearing doesn't solve the roots of the problem.
>> It's just adding bandages to a wound which never stops bleeding. I
>> proposed an initial page flag because we could use it later for
>> unconditional page clearing doing a one line change in a header file.
>> I see a lot of speculation on what works and what doesn't, but
>> there isn't much on the practical side of things, yet. I provided test
>> results that proved some of the comments wrong, and I've referenced
>> literature which shows the reasoning behind all this. What else can I do
>> to make you understand you are missing the point here?
>
> Hey, if you want to add a CONFIG_ZERO_ALL_MEMORY_PARANOIA thing that can be 
> disabled, go for it! But you have to find someone else to take the merge 
> the SLAB bits because, quite frankly, I am not convinced it's worth it. And 
> the hand waving you're doing here isn't really helping your case, sorry.

For a second I thought it was Ingo who was writing this e-mail.
Apologies about the confusion.

What was the technical explanation and reasoning behind your remarks,
again?

	Larry
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