From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFBAFC43334 for ; Wed, 6 Jul 2022 21:18:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233754AbiGFVSp (ORCPT ); Wed, 6 Jul 2022 17:18:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232890AbiGFVSo (ORCPT ); Wed, 6 Jul 2022 17:18:44 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F02F1659A for ; Wed, 6 Jul 2022 14:18:43 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id EC631B81E8E for ; Wed, 6 Jul 2022 21:18:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A887C3411C; Wed, 6 Jul 2022 21:18:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657142320; bh=mRfca7fLV+uXOxjUgfTt0zkQIpLjqCWzfthlDGKatJ0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=bim+E/6R+6qfUrUVx0zbRqUp6CZzLKww7UrTE7DAcJpelCzB/WGLXsN7GfVLjUWdR aL0tbMZVGBCAEfVB+xQmfm3uUjqH2CnGihIfZPq3KlYThNOSxUFzsmZ4wBZjxFSIwe 7yf8pyX5NV7j67PT7cmCXaZ6+swI/6lFGbF8Uu1eOqdMezqF8jRC0AhYTpitotE3cW D/mxPdRdyr7XQXhduvvq5eDucLCvew+rAYgN0UA+z88LRaCGmQxuAeVP1wgTa38qyb 8kjMf6gc8xepfIKItfnWnX8uzJ56FtgDV6f9+H1JxQ6bmc3tyfypHR6IndnPrTguIm 3K3ZPTisdEncQ== Date: Wed, 6 Jul 2022 14:18:39 -0700 From: Jakub Kicinski To: Antoine Tenart Cc: Eric Dumazet , David Miller , Paolo Abeni , netdev Subject: Re: [PATCH net-next] Documentation: add a description for net.core.high_order_alloc_disable Message-ID: <20220706141839.469986f5@kernel.org> In-Reply-To: References: <20220706085320.17581-1-atenart@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, 6 Jul 2022 15:24:58 +0200 Eric Dumazet wrote: > linux-5.14 allowed high-order pages to be stored on the per-cpu lists. > > I ran again the benchmark cited in commit ce27ec60648d to confirm that > the slowdown we had before 5.14 for > high number of alloc/frees per second is no more. Sounds useful to know - Antoine, do you reckon we can include a mention of this knob being mostly of historical importance?