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Date:   Tue, 16 Apr 2019 20:52:12 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     David Rientjes <rientjes@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Tobin C. Harding" <tobin@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Tejun Heo <tj@...nel.org>, Qian Cai <cai@....pw>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Jesper Dangaard Brouer <brouer@...hat.com>,
        David Miller <davem@...emloft.net>
Subject: Re: [PATCH 0/1] mm: Remove the SLAB allocator

On Fri, 12 Apr 2019 12:28:16 +0100 Mel Gorman <mgorman@...hsingularity.net> wrote:

> On Wed, Apr 10, 2019 at 02:53:34PM -0700, David Rientjes wrote:
> > > FWIW, our enterprise kernel use it (latest is 4.12 based), and openSUSE
> > > kernels as well (with openSUSE Tumbleweed that includes latest
> > > kernel.org stables). AFAIK we don't enable SLAB_DEBUG even in general
> > > debug kernel flavours as it's just too slow.
> > > 
> > > IIRC last time Mel evaluated switching to SLUB, it wasn't a clear
> > > winner, but I'll just CC him for details :)
> > > 
> > 
> > We also use CONFIG_SLAB and disable CONFIG_SLAB_DEBUG for the same reason.
> 
> Would it be possible to re-evaluate using mainline kernel 5.0?

I have vague memories that slab outperforms slub for some networking
loads.  Could the net folks please comment?

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