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

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Message-Id: <E1HPHRK-0003EV-00@dorka.pomaz.szeredi.hu>
Date:	Thu, 08 Mar 2007 13:09:46 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	npiggin@...e.de
CC:	a.p.zijlstra@...llo.nl, akpm@...ux-foundation.org, mingo@...e.hu,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	benh@...nel.crashing.org, jdike@...toit.com, hugh@...itas.com,
	torvalds@...ux-foundation.org
Subject: Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas

> >   - it's a maintenance burden: I'll have to layer the m/ctime update
> >     patch on top of this
> 
> But you have to update m/ctime for BDI_CAP_NO_WRITEBACK mappings anyway
> don't you?

Yes, but that's a different aspect of msync(), not about the data
writeback issues that nonlinear mappings have.

So a solution that solves both these problems would probably be more
complex.

> >   - the only pro for this has been that Nick thinks it cool ;)
> 
> Nonlinear in general, rather than this specifically.

Fair enough.

Miklos
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