Re: [PATCH] mm: kill kmemcheck

On Wed, 11 Mar 2015 09:39:33 -0400
Sasha Levin [off-list ref] wrote:

On 03/11/2015 08:40 AM, Steven Rostedt wrote:

quoted

On Wed, 11 Mar 2015 08:34:46 -0400
Sasha Levin [off-list ref] wrote:

quoted

quoted

Fair enough. We knew there are existing kmemcheck users, but KASan should be
superior both in performance and the scope of bugs it finds. It also shouldn't
impose new limitations beyond requiring gcc 4.9.2+.

Ouch! OK, then I can't use it. I'm currently compiling with gcc 4.6.3.

It will be a while before I upgrade my build farm to something newer.

Are you actually compiling new kernels with 4.6.3, or are you using older
kernels as well?

Yes for both :-)

There's no real hurry to kill kmemcheck right now, but we do want to stop
supporting that in favour of KASan.

Understood, but the kernel is suppose to support older compilers.
Perhaps we can keep kmemcheck for now and say it's obsoleted if you
have a newer compiler. Because it will be a while before I upgrade my
compilers. I don't upgrade unless I have a good reason to do so. Not
sure KASan fulfills that requirement.

-- Steve

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