linux-kernel - Re: [PATCH 0/4] promote zcache from staging

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Message-ID: <50254F69.2000409@linux.vnet.ibm.com>
Date:	Fri, 10 Aug 2012 13:14:01 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Minchan Kim <minchan@...nel.org>,
	Konrad Wilk <konrad.wilk@...cle.com>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	Kurt Hackel <kurt.hackel@...cle.com>
Subject: Re: [PATCH 0/4] promote zcache from staging

On 08/09/2012 03:20 PM, Dan Magenheimer wrote
> I also wonder if you have anything else unusual in your
> test setup, such as a fast swap disk (mine is a partition
> on the same rotating disk as source and target of the kernel build,
> the default install for a RHEL6 system)?

I'm using a normal SATA HDD with two partitions, one for
swap and the other an ext3 filesystem with the kernel source.

> Or have you disabled cleancache?

Yes, I _did_ disable cleancache.  I could see where having
cleancache enabled could explain the difference in results.

> Or have you changed any sysfs parameters or
> other kernel files?

No.

> And are you using 512M of physical memory or relying on
> kernel boot parameters to reduce visible memory

Limited with mem=512M boot parameter.

> ... and
> if the latter have you confirmed with /proc/meminfo?

Yes, confirmed.

Seth

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