linux-kernel - Re: CROSS_MEMORY

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Message-ID: <20120601110647.2c446aa7@rockpopper>
Date:	Fri, 1 Jun 2012 11:06:47 +1000
From:	Christopher Yeoh <cyeoh@....ibm.com>
To:	Borislav Petkov <bp@...64.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: CROSS_MEMORY_ATTACH default y?

On Thu, 31 May 2012 17:42:24 +0200
Borislav Petkov <bp@...64.org> wrote:

> + LKML.
> 
> On Thu, May 31, 2012 at 05:35:12PM +0200, Borislav Petkov wrote:
> > Hi,
> > 
> > can you please explain why CROSS_MEMORY_ATTACH is default y? Why
> > should those process_vm_{readv,writev} syscalls be enabled by
> > default?

There was a bit of a discussion at the time I submitted the patch:

https://lkml.org/lkml/2012/4/23/606

Basically CMA had been in for a while already in a released kernel
before I submitted a patch to allow it to be disabled. So the patch
preserves existing behaviour.

Regards,

Chris
-- 
cyeoh@....ibm.com

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