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=-0.9 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,UNPARSEABLE_RELAY,URIBL_BLOCKED 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 85DDFC433E0 for ; Tue, 19 May 2020 20:23:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6407D207E8 for ; Tue, 19 May 2020 20:23:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="elyQXPFD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726871AbgESUXM (ORCPT ); Tue, 19 May 2020 16:23:12 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:39712 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726290AbgESUXM (ORCPT ); Tue, 19 May 2020 16:23:12 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04JKLjxR100506; Tue, 19 May 2020 20:22:04 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2020-01-29; bh=qNNW5s1xeGm+K2As9XYYCmIIR1n/LTaTzzpAHOOw+OM=; b=elyQXPFD4nsB/VJn38aBWCqpaCIB6MQMHkKVGP1fLmJIRaO7WfkNspqYzxRIdKj1mo1W exW58AJu6Yz96MStBgD10iAvRwhmFECHXd+mHYU2ItwbCK3DLhTT/xFCPIE2ESWWyFoa CdkF17eIyWppQ4MS080TTxM7CbAX565LUgzOyfTTHHSpH9m7LCv6sZ8cU5632wyyFSuW 2O0xftqaO0MnPzdhQkLmLhvD1D2elbcGZ8Kvv2QgP9RhPo8JqRnEgWWxXptpMi4zWa+t giKpNCyYEoe8QjuC7cd/w2aYFFdAgk4MLabOmivtaxxU/FnbCz8MlZf75ZLHIACv39LS sA== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by aserp2120.oracle.com with ESMTP id 31284kyngg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 19 May 2020 20:22:04 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04JKIOor097543; Tue, 19 May 2020 20:22:03 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3030.oracle.com with ESMTP id 314gm5qmhr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 May 2020 20:22:02 +0000 Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 04JKM0LT031192; Tue, 19 May 2020 20:22:00 GMT Received: from dhcp-10-154-188-23.vpn.oracle.com (/10.154.188.23) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 19 May 2020 13:21:59 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: [PATCH v7 0/4] support reserving crashkernel above 4G on arm64 kdump From: John Donnelly In-Reply-To: Date: Tue, 19 May 2020 15:21:58 -0500 Cc: Chen Zhou , Simon Horman , Will Deacon , "open list:DOCUMENTATION" , Catalin Marinas , Bhupesh Sharma , kexec mailing list , "linux-kernel@vger.kernel.org" , Ingo Molnar , James Morse , Thomas Gleixner , Prabhakar Kushwaha , Dave Young , Linux ARM , John Donnelly Content-Transfer-Encoding: quoted-printable Message-Id: <3D37F6BE-ECFC-4EC0-A7C4-341F85FC056E@oracle.com> References: <20191223152349.180172-1-chenzhou10@huawei.com> To: Arnd Bergmann X-Mailer: Apple Mail (2.3445.9.1) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9626 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxlogscore=999 adultscore=0 phishscore=0 mlxscore=0 spamscore=0 suspectscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005190173 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9626 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxscore=0 cotscore=-2147483648 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 phishscore=0 spamscore=0 bulkscore=0 adultscore=0 priorityscore=1501 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005190174 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On May 19, 2020, at 5:21 AM, Arnd Bergmann wrote: >=20 > On Thu, Mar 26, 2020 at 4:10 AM Chen Zhou = wrote: >>=20 >> Hi all, >>=20 >> Friendly ping... >=20 > I was asked about this patch series, and see that you last posted it = in > December. I think you should rebase it to linux-5.7-rc6 and post the > entire series again to make progress, as it's unlikely that any = maintainer > would pick up the patches from last year. >=20 > For the contents, everything seems reasonable to me, but I noticed = that > you are adding a property to the /chosen node without adding the > corresponding documentation to > Documentation/devicetree/bindings/chosen.txt >=20 > Please add that, and Cc the devicetree maintainers on the updated > patch. >=20 > Arnd >=20 >> On 2019/12/23 23:23, Chen Zhou wrote: >>> This patch series enable reserving crashkernel above 4G in arm64. >>>=20 >>> There are following issues in arm64 kdump: >>> 1. We use crashkernel=3DX to reserve crashkernel below 4G, which = will fail >>> when there is no enough low memory. >>> 2. Currently, crashkernel=3DY@X can be used to reserve crashkernel = above 4G, >>> in this case, if swiotlb or DMA buffers are required, crash dump = kernel >>> will boot failure because there is no low memory available for = allocation. >>>=20 >>> The previous changes and discussions can be retrieved from: >>>=20 >>> Changes since [v6] >>> - Fix build errors reported by kbuild test robot. > ... Hi=20 We found=20 https://lkml.org/lkml/2020/4/30/1583 Has cured our Out-Of-Memory kdump failures.=20 From Henry Willard=20 Subject [PATCH] mm: Limit boost_watermark on small zones. I am currently not on linux-kernel@vger.kernel.org. dlist for all to see = this message so you may want to rebase and see if this cures your OoM = issue and share the results.=20