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 DDEBFC35250 for ; Mon, 10 Feb 2020 06:09:37 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9EFB320870 for ; Mon, 10 Feb 2020 06:09:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Steat0pt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9EFB320870 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 4C2906B00C0; Mon, 10 Feb 2020 01:09:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 473AB6B00C1; Mon, 10 Feb 2020 01:09:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 388636B00C2; Mon, 10 Feb 2020 01:09:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0067.hostedemail.com [216.40.44.67]) by kanga.kvack.org (Postfix) with ESMTP id 1EE026B00C0 for ; Mon, 10 Feb 2020 01:09:37 -0500 (EST) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id D06D1181AC9BF for ; Mon, 10 Feb 2020 06:09:36 +0000 (UTC) X-FDA: 76473190752.01.fish85_8e0afdc31704d X-HE-Tag: fish85_8e0afdc31704d X-Filterd-Recvd-Size: 3768 Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) by imf43.hostedemail.com (Postfix) with ESMTP for ; Mon, 10 Feb 2020 06:09:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581314975; 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=IqOFjhChuiORW/RrDFvlEAUiHIU2llqb8x6ebWA0Acc=; b=Steat0ptfa9pALSckfYrvpRqlGHeULkgRUDDnH1JtXqO8F2IdX+P+tLslXvRT/qAQBRDtQ 8/xffAeogto8tPzRJ+iiCxsWPmQ6Tyoiv1IbNd3lliCGNyKxJPNb+TO2GPB3tykQVcqcPl 6M08vCMMC09XxFc8miHxJT47QgP/Obw= 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-241-sa-MKUnPPGSuIJhHX9EASQ-1; Mon, 10 Feb 2020 01:09:31 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 46EFC801E66; Mon, 10 Feb 2020 06:09:30 +0000 (UTC) Received: from localhost (ovpn-12-27.pek2.redhat.com [10.72.12.27]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4C92A26FB6; Mon, 10 Feb 2020 06:09:26 +0000 (UTC) Date: Mon, 10 Feb 2020 14:09:23 +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: <20200210060923.GC8965@MiWiFi-R3L-srv> References: <20200209213217.73abdc867faec8c359e2ba08@linux-foundation.org> <20200210054027.GI26758@MiWiFi-R3L-srv> <20200209215644.f2dfd7b6cb13f374a0ef8f32@linux-foundation.org> MIME-Version: 1.0 In-Reply-To: <20200209215644.f2dfd7b6cb13f374a0ef8f32@linux-foundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: sa-MKUnPPGSuIJhHX9EASQ-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 02/09/20 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.or= g 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? Yes, certainly. 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: https://lore.kernel.org/linux-mm/20200206125343.9070-1-richardw.yang@linux.= intel.com/