linux-kernel - Re: [PATCH/RFC 2.6.20-rc4 1/1] fbdev,mm: hecuba/E-Ink fbdev driver

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Message-ID: <45a44e480702170147x73d1e5c8v6439ac412b952a7@mail.gmail.com>
Date:	Sat, 17 Feb 2007 10:47:54 +0100
From:	"Jaya Kumar" <jayakumar.lkml@...il.com>
To:	"Nick Piggin" <nickpiggin@...oo.com.au>
Cc:	"Andrew Morton" <akpm@...l.org>,
	linux-fbdev-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH/RFC 2.6.20-rc4 1/1] fbdev,mm: hecuba/E-Ink fbdev driver

On 1/12/07, Nick Piggin <nickpiggin@...oo.com.au> wrote:
> Jaya Kumar wrote:
> > - write so get page_mkwrite where we add this page to a list
> > - also schedules a workqueue task to be run after a delay
> > - app continues writing to that page with no additional cost
> > - the workqueue task comes in and unmaps the pages on the list, then
> >  completes the work associated with updating the framebuffer
>
> Have you thought about implementing a traditional write-back cache using
> the dirty bits, rather than unmapping the page?
>

Ah, sorry, I erred in my description. I'm not unmapping pages, I'm
calling page_mkclean which uses the dirty bits.

Thanks,
jaya
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