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[140.211.169.12]) by mx.google.com with ESMTPS id g11si45730890pgo.563.2019.04.16.20.52.14 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Apr 2019 20:52:14 -0700 (PDT) Received-SPF: pass (google.com: domain of akpm@linux-foundation.org designates 140.211.169.12 as permitted sender) client-ip=140.211.169.12; Authentication-Results: mx.google.com; spf=pass (google.com: domain of akpm@linux-foundation.org designates 140.211.169.12 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Received: from localhost.localdomain (c-73-223-200-170.hsd1.ca.comcast.net [73.223.200.170]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 93DCADA6; Wed, 17 Apr 2019 03:52:13 +0000 (UTC) Date: Tue, 16 Apr 2019 20:52:12 -0700 From: Andrew Morton To: Mel Gorman Cc: David Rientjes , Vlastimil Babka , "Tobin C. Harding" , Christoph Lameter , Pekka Enberg , Joonsoo Kim , Tejun Heo , Qian Cai , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jesper Dangaard Brouer , David Miller Subject: Re: [PATCH 0/1] mm: Remove the SLAB allocator Message-Id: <20190416205212.5cb286fbeec801f50269b2b5@linux-foundation.org> In-Reply-To: <20190412112816.GD18914@techsingularity.net> References: <20190410024714.26607-1-tobin@kernel.org> <20190412112816.GD18914@techsingularity.net> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 12 Apr 2019 12:28:16 +0100 Mel Gorman 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?