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From: Borislav Petkov <bp@suse.de>
To: Michal Hocko <mhocko@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	kosaki.motohiro@jp.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com,
	linux-mm@kvack.org, Borislav Petkov <bp@suse.de>,
	Dave Hansen <dave.hansen@intel.com>
Subject: Re: [-] drop_caches-add-some-documentation-and-info-messsge.patch removed from -mm tree
Date: Fri, 12 Jul 2013 14:25:57 +0200	[thread overview]
Message-ID: <20130712122557.GB24013@pd.tnic> (raw)
In-Reply-To: <20130712115028.GC15307@dhcp22.suse.cz>

On Fri, Jul 12, 2013 at 01:50:28PM +0200, Michal Hocko wrote:
> Boris then noted
> (http://lkml.indiana.edu/hypermail/linux/kernel/1210.3/00659.html)
> that he is using drop_caches to make s2ram faster but as others noted
> this just adds the overhead to the resume path so it might work only
> for certain use cases so a user space solution is more appropriate and
> Boris' use case really sounds valid.

FWIW, I still use it. :-)

And we recently validated anew, a good use case for drop_caches which
was actually already mentioned - repeatable benchmark runs. In this
case, we show how *not* to use it in those benchmark runs. :)

http://marc.info/?l=linux-kernel&m=137276096923390

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--

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  reply	other threads:[~2013-07-12 12:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-10 20:25 [-] drop_caches-add-some-documentation-and-info-messsge.patch removed from -mm tree akpm
2013-07-11  7:36 ` Michal Hocko
2013-07-11 12:39   ` Michal Hocko
2013-07-11 15:34     ` Dave Hansen
2013-07-11 15:42       ` Michal Hocko
2013-07-11 15:45         ` Dave Hansen
2013-07-11 21:50   ` Andrew Morton
2013-07-12 11:50     ` Michal Hocko
2013-07-12 12:25       ` Borislav Petkov [this message]
2013-07-12 19:08       ` KOSAKI Motohiro

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