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Date: Tue, 12 Jul 2016 12:52:01 +1000
From: Dave Chinner <david@fromorbit.com>
Subject: Re: [PATCH 00/31] Move LRU page reclaim from zones to nodes v8
Message-ID: <20160712025201.GH1922@dastard>
References: <1467387466-10022-1-git-send-email-mgorman@techsingularity.net>
 <20160707232713.GM27480@dastard>
 <20160708095203.GB11498@techsingularity.net>
 <20160711004757.GN12670@dastard>
 <20160711090224.GB9806@techsingularity.net>
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Sender: owner-linux-mm@kvack.org
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To: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrew Morton <akpm@linux-foundation.org>, Linux-MM <linux-mm@kvack.org>, Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>, Johannes Weiner <hannes@cmpxchg.org>, LKML <linux-kernel@vger.kernel.org>

On Mon, Jul 11, 2016 at 10:02:24AM +0100, Mel Gorman wrote:
> On Mon, Jul 11, 2016 at 10:47:57AM +1000, Dave Chinner wrote:
> > > I had tested XFS with earlier releases and noticed no major problems
> > > so later releases tested only one filesystem.  Given the changes since,
> > > a retest is desirable. I've posted the current version of the series but
> > > I'll queue the tests to run over the weekend. They are quite time consuming
> > > to run unfortunately.
> > 
> > Understood. I'm not following the patchset all that closely, so I
> > didn' know you'd already tested XFS.
> > 
> 
> It was needed anyway. Not all of them completed over the weekend. In
> particular, the NUMA machine is taking its time because many of the
> workloads are scaled by memory size and it takes longer.
> 
> > > On the fsmark configuration, I configured the test to use 4K files
> > > instead of 0-sized files that normally would be used to stress inode
> > > creation/deletion. This is to have a mix of page cache and slab
> > > allocations. Shout if this does not suit your expectations.
> > 
> > Sounds fine. I usually limit that test to 10 million inodes - that's
> > my "10-4" test.
> > 
> 
> Thanks.
> 
> 
> I'm not going to go through most of the results in detail. The raw data
> is verbose and not necessarily useful in most cases.

Yup, numbers look pretty good and all my concerns have gone away.
Thanks for testing, Mel! :P

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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