linux-kernel - Re: [RFC][PATCH] mm: fix page

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Message-Id: <1173291120.4718.40.camel@lappy>
Date:	Wed, 07 Mar 2007 19:12:00 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Nick Piggin <npiggin@...e.de>, Miklos Szeredi <miklos@...redi.hu>,
	akpm@...ux-foundation.org, mingo@...e.hu, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, benh@...nel.crashing.org,
	Jeff Dike <jdike@...toit.com>, hugh <hugh@...itas.com>
Subject: Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas

On Wed, 2007-03-07 at 10:00 -0800, Linus Torvalds wrote:
> 
> On Wed, 7 Mar 2007, Peter Zijlstra wrote:
> > 
> > I'm not at all happy with this, but plain disallowing remap_file_pages on bdis
> > without BDI_CAP_NO_WRITEBACK seems to offend some people, hence restrict it to
> > root only.
> 
> I don't think that's a viable approach. Nonlinear mappings would normally 
> be used by databases, and you don't want to limit databases to be run by 
> root only.

It was claimed that they use it on tmpfs only, not on a 'real'
filesystem.

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