linux-kernel - Re: [PATCH 2/2] updating ctime and mtime at syncing

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Message-Id: <E1JEPcs-0007V6-Oy@pomaz-ex.szeredi.hu>
Date:	Mon, 14 Jan 2008 14:45:18 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	peterz@...radead.org
CC:	salikhmetov@...il.com, linux-mm@...ck.org, jakob@...hought.net,
	linux-kernel@...r.kernel.org, valdis.kletnieks@...edu,
	riel@...hat.com, ksm@...dk, staubach@...hat.com,
	jesper.juhl@...il.com, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, protasnb@...il.com,
	nickpiggin@...oo.com.au
Subject: Re: [PATCH 2/2] updating ctime and mtime at syncing

> More fun, it would require marking them RO but leaving the dirty bit
> set, because this ext3 fudge where we confuse the page dirty state - or
> did that get fixed?

That got fixed by Nick, I think.

The alternative to marking pages RO, is to walk the PTEs in MS_ASYNC,
note the dirty bit and mark pages clean.  But it's possibly even more
complicated.

Miklos
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