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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFBD6C433E0 for ; Wed, 24 Jun 2020 22:01:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D7B520857 for ; Wed, 24 Jun 2020 22:01:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="rZelCg0Y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388217AbgFXWB5 (ORCPT ); Wed, 24 Jun 2020 18:01:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389832AbgFXWB4 (ORCPT ); Wed, 24 Jun 2020 18:01:56 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DECC5C061573 for ; Wed, 24 Jun 2020 15:01:55 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id t6so2143093pgq.1 for ; Wed, 24 Jun 2020 15:01:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=JtnqSIsBj/BF7IGUdXeNN8kYdqMgoQN65lThbV8+e0I=; b=rZelCg0YbzRPlv5V+vuWn7sHK13srbX1cO1mAPMUgY5O2vjHkTVamQ63cuzjEo1okr VGoq/xvgXtW3T7rM8FoDdrggIP/BCOiG/fcMJRE3z0VeakJmfqLp0FeDoqudgXv1QGM8 UFGOCWRbR2wWAx6C7coZTrMeJ4kuXqKqNUr580acWMdtPZVJNA4fy7FYZ+XtCZW4P+pa Mm2w5QoqcmG4/HU8jywfTVydwWgqTeykuOz3lQJsuL6gxMj7TG8cZOFrieNwyBnFcgvN htocwK4LkAGiIufTQ49KIumINcO7+IqKdoTELynNMvsv30ZWFNSGphyTBqrD1pEOBpk9 hmOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=JtnqSIsBj/BF7IGUdXeNN8kYdqMgoQN65lThbV8+e0I=; b=tZSn6rA1+KUbOCGElRJD6iaDJ2WhxhRBEuk48LVeK/lvu8sXswwf811cYQ653qcrtX KCH6Wuo/SFXLXRtCGYtyRxy2qufZ4OXtK+7n/yiZ5TdWzGYUE8RsT0O5zhkQrK+8GOCa 0foCOKTfsf/N/MU0hKRpBnlCzxXGtu7j9Da4uiU2fWmbAaRojS5y/NpYWJ6uP7G+tGNJ SOPIdT+375QBeLW+M5mLZSOp6f6fC9w+mAuCdBI/JajVYhOqs2Mj/vu0fvKnGUKU8AJu 2aEk6zU4hTQcc6lAtvOOwu4Rp5DOCKXWh+l9qb5bm55sAbXl94v32OBmdWjrNmsV1b5J fz2g== X-Gm-Message-State: AOAM531rYHYUzAGiAbYlJcbIsrG9euV2040pFg7eelD3oxVo5wcFTlD1 vTT73froZgXKkvK/AaDkS312Rw== X-Google-Smtp-Source: ABdhPJw0lsYH2vvdsw13COy6bxZEFzIg7Dt5qMmJFPNgfCeGO7YHrLsda6vxpHhbi8XYyIdvwHcfiA== X-Received: by 2002:aa7:9105:: with SMTP id 5mr3283028pfh.199.1593036115064; Wed, 24 Jun 2020 15:01:55 -0700 (PDT) Received: from [2620:15c:17:3:3a5:23a7:5e32:4598] ([2620:15c:17:3:3a5:23a7:5e32:4598]) by smtp.gmail.com with ESMTPSA id u26sm7814361pgo.71.2020.06.24.15.01.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jun 2020 15:01:54 -0700 (PDT) Date: Wed, 24 Jun 2020 15:01:53 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Jane Chu cc: "Luck, Tony" , Mike Kravetz , "Dr. David Alan Gilbert" , Peter Xu , Andrea Arcangeli , Matthew Wilcox , Borislav Petkov , Naoya Horiguchi , linux-edac@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@lists.01.org, "Darrick J. Wong" Subject: Re: [RFC] Make the memory failure blast radius more precise In-Reply-To: <19ffec14-28c7-fddc-3042-6ccb8d4e83fa@oracle.com> Message-ID: References: <20200623201745.GG21350@casper.infradead.org> <20200623220412.GA21232@agluck-desk2.amr.corp.intel.com> <19ffec14-28c7-fddc-3042-6ccb8d4e83fa@oracle.com> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org On Wed, 24 Jun 2020, Jane Chu wrote: > Hi, David, > > On 6/23/2020 9:32 PM, David Rientjes wrote: > > I don't want to hijack Matthew's thread which is primarily about DAX, but > > did get intrigued by your concerns about hugetlbfs page poisoning. We can > > fork the thread off here to discuss only the hugetlb application of this > > if it makes sense to you or you'd like to collaborate on it as well. > > hugetlbfs is not supported in DAX, are you planning to add support? > No, sorry, I was replying only about Tony's comment about the current page poisoning behavior for hugetlbfs and brainstorming a way that we could reduce the memory failure blast radius for hugetlb pages if we had the doublemap support that would also be useful for post-copy live migration. It's independent of DAX so I'm happy to fork this topic off into a different thread for the hugetlb discussion.