Date: Thu, 25 Jun 2015 21:48:55 +0100
From: Mel Gorman <mgorman@suse.de>
To: Nathan Zimmer <nzimmer@sgi.com>
Cc: Daniel J Blueman <daniel@numascale.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Waiman Long <waiman.long@hp.com>, Dave Hansen <dave.hansen@intel.com>,
        Scott Norton <scott.norton@hp.com>, Linux-MM <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Steffen Persvold <sp@numascale.com>
Subject: Re: [PATCH] mm: meminit: Finish initialisation of struct pages
 before basic setup
Message-ID: <20150625204855.GC26927@suse.de>
References: <20150513163157.GR2462@suse.de>
 <1431597783.26797.1@cpanel21.proisp.no>
 <20150624225028.GA97166@asylum.americas.sgi.com>
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On Wed, Jun 24, 2015 at 05:50:28PM -0500, Nathan Zimmer wrote:
> My apologies for taking so long to get back to this.
> 
> I think I did locate two potential sources of slowdown.
> One is the set_cpus_allowed_ptr as I have noted previously.
> However I only notice that on the very largest boxes.
> I did cobble together a patch that seems to help.
> 

If you are using kthread_create_on_node(), is it even necessary to call
set_cpus_allowed_ptr() at all?

-- 
Mel Gorman
SUSE Labs
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