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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A1EAEC352A4 for ; Mon, 10 Feb 2020 06:16:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6545621739 for ; Mon, 10 Feb 2020 06:16:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NlQvtqTD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6545621739 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D70D66B00C2; Mon, 10 Feb 2020 01:16:03 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D1FDE6B00C3; Mon, 10 Feb 2020 01:16:03 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C38B26B00C4; Mon, 10 Feb 2020 01:16:03 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0089.hostedemail.com [216.40.44.89]) by kanga.kvack.org (Postfix) with ESMTP id A8F1D6B00C2 for ; Mon, 10 Feb 2020 01:16:03 -0500 (EST) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 4D1F4180AD802 for ; Mon, 10 Feb 2020 06:16:03 +0000 (UTC) X-FDA: 76473207006.27.group36_34cb7958ca223 X-HE-Tag: group36_34cb7958ca223 X-Filterd-Recvd-Size: 4068 Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) by imf06.hostedemail.com (Postfix) with ESMTP for ; Mon, 10 Feb 2020 06:16:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581315362; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RHQXkUgIZmx7/kbhBt+wPsLCllE2840ZnjEXBsVo3bE=; b=NlQvtqTDDqOAhEzoY/HkMh4aJK5aE5MuuZSNt47IwHUKd7lqGdzE6zOJDRVQOu2gisYkYV gv2I9P4J1/on4SQwqItdX5Vc7lTjlL2rJYLwEcHUugl1WN/qwuY3G9ulXLakP8C0YiSv5T Di26UaH7Pev2anYQFmGiz6/oyX2f+QU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-213-ZtmHy9c8Pw6n3QQmI1VxrQ-1; Mon, 10 Feb 2020 01:15:58 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 24CF28010D6; Mon, 10 Feb 2020 06:15:57 +0000 (UTC) Received: from localhost (ovpn-12-27.pek2.redhat.com [10.72.12.27]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E13987FB60; Mon, 10 Feb 2020 06:15:53 +0000 (UTC) Date: Mon, 10 Feb 2020 14:15:51 +0800 From: Baoquan He To: Andrew Morton , richardw.yang@linux.intel.com Cc: David Hildenbrand , Michal Hocko , Naoya Horiguchi , linux-mm@kvack.org Subject: Re: [Bug 206401] kernel panic on Hyper-V after 5 minutes due to memory hot-add Message-ID: <20200210061551.GD8965@MiWiFi-R3L-srv> References: <20200209213217.73abdc867faec8c359e2ba08@linux-foundation.org> <20200210054027.GI26758@MiWiFi-R3L-srv> <20200209215644.f2dfd7b6cb13f374a0ef8f32@linux-foundation.org> <20200210060923.GC8965@MiWiFi-R3L-srv> MIME-Version: 1.0 In-Reply-To: <20200210060923.GC8965@MiWiFi-R3L-srv> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: ZtmHy9c8Pw6n3QQmI1VxrQ-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline 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 02/10/20 at 02:09pm, Baoquan He wrote: > On 02/09/20 at 09:56pm, Andrew Morton wrote: > > On Mon, 10 Feb 2020 13:40:27 +0800 Baoquan He wrote: > >=20 > > > Hi Andrew, > > >=20 > > > On 02/09/20 at 09:32pm, Andrew Morton wrote: > > > > On Tue, 04 Feb 2020 11:25:48 +0000 bugzilla-daemon@bugzilla.kernel.= org wrote: > > > >=20 > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=3D206401 > > > > >=20 > > > >=20 > > > > An oops during mem hotadd. Could someone please take a look when > > > > convenient? > > >=20 > > > This has been addressed by Wei Yang's patch, please check it here: > > >=20 > > > http://lkml.kernel.org/r/20200209104826.3385-7-bhe@redhat.com > > >=20 > >=20 > > hm, OK, thanks. It's unfortunate that a 5.5 fix is buried in a > > six-patch series which is still in progress! Can we please merge that > > as a standalone fix with a cc:stable, Fixes:, etc? Maybe can add Fixes tag as follow when merge: Fixes: ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug") Wei Yang, please correct me if I am wrong. >=20 > Yes, certainly. >=20 > Wei Yang posted it separately earlier. I just grabbed it into my > patchset when test them all, since hot add/remove of SPARSE|!VMEMMAP > have been broken since sub-section hotplug added. Wei Yang's old post > can be found here: >=20 > https://lore.kernel.org/linux-mm/20200206125343.9070-1-richardw.yang@linu= x.intel.com/ >=20