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 B5E52C43334 for ; Mon, 27 Jun 2022 14:40:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235916AbiF0Okg (ORCPT ); Mon, 27 Jun 2022 10:40:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234816AbiF0Oke (ORCPT ); Mon, 27 Jun 2022 10:40:34 -0400 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 228DCBE3F for ; Mon, 27 Jun 2022 07:40:32 -0700 (PDT) Received: from zn.tnic (p200300ea9746579d329c23fffea6a903.dip0.t-ipconnect.de [IPv6:2003:ea:9746:579d:329c:23ff:fea6:a903]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 5A6221EC0324; Mon, 27 Jun 2022 16:40:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1656340826; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=5Uw0AJzcz+NaVP9+fmQVzmmgxZlLX/u7bhWmR6+QNVg=; b=nxhiv/7MWD6J1g1BiymOqQXKB7/6tilsS8SNk+8wU2gCWigCHqKQmasQKoDIWh0WcnXIkH xt2cqZGeto8MWLFG1G2PT9wT41ppg7TWMXQCG4rDEwSzI3YFRyVaDFPd5Y2WhBfY4EBuv4 pwKz876sFyXzxCeUzWaYFvzGT4EJTP8= Date: Mon, 27 Jun 2022 16:40:26 +0200 From: Borislav Petkov To: Tony Luck Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Yazen Ghannam Subject: Re: [PATCH] RAS/CEC: Reduce default threshold to offline a page to "2" Message-ID: References: <20220607212015.175591-1-tony.luck@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220607212015.175591-1-tony.luck@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 07, 2022 at 02:20:15PM -0700, Tony Luck wrote: > A large scale study of memory errors in data centers showed that it is > best to aggressively take pages with corrected errors offline. This is > the best strategy of using corrected errors as a predictor of future > uncorrected errors. > > Signed-off-by: Tony Luck > > --- > Here's the link to the study. I thought of putting into the code > comment, or the commit comment. But these links are sometimes changed > as website is re-organised, making the link stale. > > https://www.intel.com/content/dam/www/public/us/en/documents/intel-and-samsung-mrt-improving-memory-reliability-at-data-centers.pdf > > The paper has two recommendations: > 1) Change threshold to "2". Kinda unconditional that... we haven't talked to other vendors even. > 2) Do very smart platform dependent things If you mean AI, that probably won't happen in the kernel. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette