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From: "Anton Salikhmetov" <salikhmetov@gmail.com>
To: "Miklos Szeredi" <miklos@szeredi.hu>
Cc: linux-mm@kvack.org, jakob@unthought.net,
	linux-kernel@vger.kernel.org, valdis.kletnieks@vt.edu,
	riel@redhat.com, ksm@42.dk, staubach@redhat.com,
	jesper.juhl@gmail.com, torvalds@linux-foundation.org,
	a.p.zijlstra@chello.nl, akpm@linux-foundation.org,
	protasnb@gmail.com, r.e.wolff@bitwizard.nl,
	hidave.darkstar@gmail.com, hch@infradead.org
Subject: Re: [PATCH -v6 0/2] Fixing the issue with memory-mapped file times
Date: Fri, 18 Jan 2008 13:31:29 +0300	[thread overview]
Message-ID: <4df4ef0c0801180231j46391b2byc38be709b3cbf2c8@mail.gmail.com> (raw)
In-Reply-To: <E1JFnho-0008TH-5G@pomaz-ex.szeredi.hu>

2008/1/18, Miklos Szeredi <miklos@szeredi.hu>:
> > 4. Performance test was done using the program available from the
> > following link:
> >
> > http://bugzilla.kernel.org/attachment.cgi?id=14493
> >
> > Result: the impact of the changes was negligible for files of a few
> > hundred megabytes.
>
> Could you also test with ext4 and post some numbers?  Afaik, ext4 uses
> nanosecond timestamps, so the time updating code would be exercised
> more during the page faults.
>
> What about performance impact on msync(MS_ASYNC)?  Could you please do
> some measurment of that as well?

I'll do the measurements for the MS_ASYNC case and for the Ext4 filesystem.

>
> Thanks,
> Miklos
>
>

  reply	other threads:[~2008-01-18 10:31 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-17 22:31 Anton Salikhmetov
2008-01-17 22:31 ` [PATCH -v6 1/2] Massive code cleanup of sys_msync() Anton Salikhmetov
2008-01-18  9:33   ` Miklos Szeredi
2008-01-18 10:30     ` Anton Salikhmetov
2008-01-17 22:31 ` [PATCH -v6 2/2] Updating ctime and mtime for memory-mapped files Anton Salikhmetov
2008-01-18  9:51   ` Miklos Szeredi
2008-01-18 10:15     ` Peter Zijlstra
2008-01-18 10:25       ` Peter Zijlstra
2008-01-18 10:39         ` Anton Salikhmetov
2008-01-18 17:58         ` Linus Torvalds
2008-01-18 18:11           ` Miklos Szeredi
2008-01-18 18:28             ` Rik van Riel
2008-01-18 18:51               ` Miklos Szeredi
2008-01-18 18:43             ` Linus Torvalds
2008-01-18 18:57               ` Miklos Szeredi
2008-01-18 19:08                 ` Linus Torvalds
2008-01-18 19:22                   ` Miklos Szeredi
2008-01-18 19:35                     ` Linus Torvalds
2008-01-18 19:58                       ` Anton Salikhmetov
2008-01-18 20:22                         ` Linus Torvalds
2008-01-18 21:03                           ` Anton Salikhmetov
2008-01-18 21:27                             ` Linus Torvalds
2008-01-18 22:04                               ` Anton Salikhmetov
2008-01-18 22:21                                 ` Linus Torvalds
2008-01-18 22:35                                   ` Anton Salikhmetov
2008-01-18 22:32                       ` Ingo Oeser
2008-01-18 22:47                         ` Linus Torvalds
2008-01-18 22:54                           ` Rik van Riel
2008-01-19  0:50                             ` Matt Mackall
2008-01-19  4:25                               ` Rik van Riel
2008-01-19 10:22                               ` Miklos Szeredi
2008-01-19 15:49                                 ` Matt Mackall
2008-01-21 14:25                           ` Peter Staubach
2008-01-21 14:36                             ` Anton Salikhmetov
2008-01-18 10:38       ` Miklos Szeredi
2008-01-18 11:00         ` Peter Zijlstra
2008-01-18 11:17           ` Miklos Szeredi
2008-01-18 11:23             ` Peter Zijlstra
2008-01-18 11:36               ` Miklos Szeredi
2008-01-18  9:40 ` [PATCH -v6 0/2] Fixing the issue with memory-mapped file times Miklos Szeredi
2008-01-18 10:31   ` Anton Salikhmetov [this message]
2008-01-18 19:48   ` Anton Salikhmetov
2008-01-19 10:45     ` Miklos Szeredi

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