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Date:   Tue, 16 Apr 2019 20:52:12 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Mel Gorman <mgorman@techsingularity.net>
Cc:     David Rientjes <rientjes@google.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        "Tobin C. Harding" <tobin@kernel.org>,
        Christoph Lameter <cl@linux.com>,
        Pekka Enberg <penberg@kernel.org>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Tejun Heo <tj@kernel.org>, Qian Cai <cai@lca.pw>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org, Jesper Dangaard Brouer <brouer@redhat.com>,
        David Miller <davem@davemloft.net>
Subject: Re: [PATCH 0/1] mm: Remove the SLAB allocator
Message-Id: <20190416205212.5cb286fbeec801f50269b2b5@linux-foundation.org>
In-Reply-To: <20190412112816.GD18914@techsingularity.net>
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        <alpine.DEB.2.21.1904101452340.100430@chino.kir.corp.google.com>
        <20190412112816.GD18914@techsingularity.net>
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On Fri, 12 Apr 2019 12:28:16 +0100 Mel Gorman <mgorman@techsingularity.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?