linux-kernel - Re: [PATCH] sysctl: Add a feature to drop caches selectively

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Message-ID: <20140627024834.GX9508@dastard>
Date:	Fri, 27 Jun 2014 12:48:34 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Artem Bityutskiy <dedekind1@...il.com>
Cc:	Thomas Knauth <thomas.knauth@....de>,
	David Rientjes <rientjes@...gle.com>,
	Maksym Planeta <mcsim.planeta@...il.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysctl: Add a feature to drop caches selectively

On Thu, Jun 26, 2014 at 09:13:19AM +0300, Artem Bityutskiy wrote:
> On Thu, 2014-06-26 at 11:06 +1000, Dave Chinner wrote:
> > Your particular use case can be handled by directing your benchmark
> > at a filesystem mount point and unmounting the filesystem in between 
> > benchmark runs. There is no ned to adding kernel functionality for
> > somethign that can be so easily acheived by other means, especially
> > in benchmark environments where *everything* is tightly controlled.
> 
> If I was a benchmark writer, I would not be willing running it as root
> to be able to mount/unmount, I would not be willing to require the
> customer creating special dedicated partitions for the benchmark,
> because this is too user-unfriendly. Or do I make incorrect assumptions?

Just add the dev/mntpt to /etc/fstab and add "user" to the
configuration and the need for root goes away.

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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