linux-kernel - Re: mmap dirty limits on 32 bit kernels (Was: [BUG] New Kernel Bugs)

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Message-Id: <1195161143.22457.44.camel@lappy>
Date:	Thu, 15 Nov 2007 22:12:23 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Bron Gondwana <brong@...tmail.fm>,
	Christian Kujau <lists@...dbynature.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	robm@...tmail.fm
Subject: Re: mmap dirty limits on 32 bit kernels (Was: [BUG] New Kernel
	Bugs)


On Thu, 2007-11-15 at 21:59 +0100, Peter Zijlstra wrote:
> On Thu, 2007-11-15 at 12:56 -0800, Linus Torvalds wrote:
> > 
> > On Thu, 15 Nov 2007, Peter Zijlstra wrote:
> > > 
> > > Something like this ought to do I guess. Although my
> > > mapping_is_buffercache() is the ugliest thing. I'm sure that can be done
> > > better.
> > 
> > No, this absolutely sucks.
> 
> Agreed, I was just about to send out an email saying that.

Say all buffer cache users were against default_backing_dev_info, and
we'd give default_backing_dev_info less, that should work out, right?

( I'm not yet clear on if buffer cache already uses
default_backing_dev_info or not, bdget() seems to suggest it does )





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