linux-kernel - Re: [PATCH 3/3] mm: slub: Default slub_max

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Message-ID: <alpine.DEB.2.00.1105121345450.29359@router.home>
Date:	Thu, 12 May 2011 13:46:48 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
cc:	Pekka Enberg <penberg@...nel.org>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Colin King <colin.king@...onical.com>,
	Raghavendra D Prabhu <raghu.prabhu13@...il.com>,
	Jan Kara <jack@...e.cz>, Chris Mason <chris.mason@...cle.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 3/3] mm: slub: Default slub_max_order to 0

On Thu, 12 May 2011, James Bottomley wrote:

> On Thu, 2011-05-12 at 18:55 +0300, Pekka Enberg wrote:
> > On Thu, 2011-05-12 at 10:43 -0500, James Bottomley wrote:
> > > However, since you admit even you see problems, let's concentrate on
> > > fixing them rather than recriminations?
> >
> > Yes, please. So does dropping max_order to 1 help?
> > PAGE_ALLOC_COSTLY_ORDER is set to 3 in 2.6.39-rc7.
>
> Just booting with max_slab_order=1 (and none of the other patches
> applied) I can still get the machine to go into kswapd at 99%, so it
> doesn't seem to make much of a difference.

slub_max_order=1 right? Not max_slab_order.
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