linux-kernel - Re: [PATCH -v8 4/4] The design document for memory-mapped file times update

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Message-Id: <E1JHdE4-0002Jk-QG@pomaz-ex.szeredi.hu>
Date:	Wed, 23 Jan 2008 11:53:00 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	salikhmetov@...il.com
CC:	miklos@...redi.hu, 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,
	a.p.zijlstra@...llo.nl, akpm@...ux-foundation.org,
	protasnb@...il.com, r.e.wolff@...wizard.nl,
	hidave.darkstar@...il.com, hch@...radead.org
Subject: Re: [PATCH -v8 4/4] The design document for memory-mapped file times update

> I've already written in the cover letter that functional tests passed
> successfully.
>
> debian:~/times# ./times /mnt/file
> begin   1201084493      1201084493      1201084281
> write   1201084494      1201084494      1201084281
> mmap    1201084494      1201084494      1201084495
> b       1201084496      1201084496      1201084495

Ah, OK, this is becuase mmap doesn't actually set up the page tables
by default.   Try adding MAP_POPULATE to the flags.

Please also try

   ./times /mnt/file -s

Thanks,
Miklos
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