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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=ham 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 510D7C43142 for ; Wed, 27 Jun 2018 17:47:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 040AB24623 for ; Wed, 27 Jun 2018 17:47:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 040AB24623 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934541AbeF0RrI (ORCPT ); Wed, 27 Jun 2018 13:47:08 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:42936 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753232AbeF0RrG (ORCPT ); Wed, 27 Jun 2018 13:47:06 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E4D0081A8E54; Wed, 27 Jun 2018 17:47:05 +0000 (UTC) Received: from redhat.com (ovpn-120-46.rdu2.redhat.com [10.10.120.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id B27C61C672; Wed, 27 Jun 2018 17:47:02 +0000 (UTC) Date: Wed, 27 Jun 2018 14:47:01 -0300 From: "Herton R. Krzesinski" To: Pavel Tatashin Cc: mhocko@kernel.org, LKML , Mel Gorman , Andrew Morton , Masayoshi Mizuma , Daniel Jordan , Steven Sistare , Johannes Weiner , Vlastimil Babka , Miles Chen , Paul Burton , Wei Yang , Yaowei Bai , Heiko Carstens , Gioh Kim , AKASHI Takahiro , Catalin Marinas , linux-mm@vger.kernel.org, aquini@redhat.com, lwoodman@redhat.com, n-horiguchi@ah.jp.nec.com Subject: Re: Kernel crash after "mm: initialize pages on demand during boot" Message-ID: <20180627174701.tq5rkzjh6cw2cpmb@dhcppc10> References: <20180626204152.fyb5wzdduif2h5sg@dhcppc10> <20180627071925.GA32348@dhcp22.suse.cz> <20180627133843.rqzlfrn4sabftkn4@dhcppc10> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180512 X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 27 Jun 2018 17:47:06 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 27 Jun 2018 17:47:06 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'herton@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 27, 2018 at 11:06:14AM -0400, Pavel Tatashin wrote: > On Wed, Jun 27, 2018 at 10:15 AM Herton R. Krzesinski wrote: > > Thanks, I'll try it. It'll probably work since I tried memory_reserve > > but "hacking" it at e820__register_nosave_regions, anyway I'll confirm > > it here. > > If it works, please send the new "Reserved but unavailable" value from dmesg: > [ 0.000000] Reserved but unavailable: 103 pages It worked, I don't see the oops with the patch. Here is the relevant parts of dmesg (with memblock=debug): [ 0.000000] found SMP MP-table at [mem 0x000fce40-0x000fce4f] mapped at [(____ptrval____)] [ 0.000000] memblock_reserve: [0x00000000000fce40-0x00000000000fce4f] smp_scan_config+0xb1/0xf5 [ 0.000000] memblock_reserve: [0x00000000000fcc20-0x00000000000fcdd3] smp_scan_config+0xc8/0xf5 [ 0.000000] memblock_reserve: [0x0000000039494000-0x00000000394a0fff] setup_arch+0x5b7/0xcb0 [ 0.000000] memblock_reserve: [0x0000000000000000-0x0000000000000fff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_add: [0x0000000000001000-0x000000000009a3ff] e820__memblock_setup+0x6d/0x9d [ 0.000000] memblock_reserve: [0x000000000009a400-0x000000000009ffff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x00000000000a0000-0x00000000000dffff] e820__memblock_setup+0x44/0x9d [ 0.000000] memblock_reserve: [0x00000000000e0000-0x00000000000fffff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_add: [0x0000000000100000-0x000000007f3e4fff] e820__memblock_setup+0x6d/0x9d [ 0.000000] memblock_reserve: [0x000000007f3e5000-0x000000007f42cfff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x000000007f42d000-0x000000007f433fff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x000000007f434000-0x000000007f504fff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x000000007f505000-0x000000007f50ffff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x000000007f510000-0x000000007f535fff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x000000007f536000-0x000000007f578fff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_add: [0x000000007f579000-0x000000007f7fffff] e820__memblock_setup+0x6d/0x9d [ 0.000000] memblock_reserve: [0x000000007f800000-0x00000000dfffffff] e820__memblock_setup+0x44/0x9d [ 0.000000] memblock_reserve: [0x00000000e0000000-0x00000000efffffff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x00000000f0000000-0x00000000fed1bfff] e820__memblock_setup+0x44/0x9d [ 0.000000] memblock_reserve: [0x00000000fed1c000-0x00000000fed3ffff] e820__memblock_setup+0x66/0x9d [ 0.000000] memblock_reserve: [0x00000000fed40000-0x00000000feffffff] e820__memblock_setup+0x44/0x9d [ 0.000000] memblock_reserve: [0x00000000ff000000-0x00000000ffffffff] e820__memblock_setup+0x66/0x9d [ 0.000000] MEMBLOCK configuration: [ 0.000000] memory size = 0x000000007f605400 reserved size = 0x0000000086935c00 [ 0.000000] memory.cnt = 0x3 [ 0.000000] memory[0x0] [0x0000000000001000-0x0000000000099fff], 0x0000000000099000 bytes flags: 0x0 [ 0.000000] memory[0x1] [0x0000000000100000-0x000000007f3e4fff], 0x000000007f2e5000 bytes flags: 0x0 [ 0.000000] memory[0x2] [0x000000007f579000-0x000000007f7fffff], 0x0000000000287000 bytes flags: 0x0 [ 0.000000] reserved.cnt = 0x6 [ 0.000000] reserved[0x0] [0x0000000000000000-0x0000000000000fff], 0x0000000000001000 bytes flags: 0x0 [ 0.000000] reserved[0x1] [0x000000000009a400-0x00000000000fffff], 0x0000000000065c00 bytes flags: 0x0 [ 0.000000] reserved[0x2] [0x000000002f6bd000-0x0000000033b56fff], 0x000000000449a000 bytes flags: 0x0 [ 0.000000] reserved[0x3] [0x0000000037a00000-0x00000000394a0fff], 0x0000000001aa1000 bytes flags: 0x0 [ 0.000000] reserved[0x4] [0x000000007f3e5000-0x000000007f578fff], 0x0000000000194000 bytes flags: 0x0 [ 0.000000] reserved[0x5] [0x000000007f800000-0x00000000ffffffff], 0x0000000080800000 bytes flags: 0x0 ... [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.000000] DMA32 [mem 0x0000000001000000-0x000000007f7fffff] [ 0.000000] Normal empty [ 0.000000] Device empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000001000-0x0000000000099fff] [ 0.000000] node 0: [mem 0x0000000000100000-0x000000007f3e4fff] [ 0.000000] node 0: [mem 0x000000007f579000-0x000000007f7fffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x000000007f7fffff] [ 0.000000] On node 0 totalpages: 521733 [ 0.000000] DMA zone: 64 pages used for memmap [ 0.000000] DMA zone: 21 pages reserved [ 0.000000] DMA zone: 3993 pages, LIFO batch:0 [ 0.000000] DMA32 zone: 8096 pages used for memmap [ 0.000000] DMA32 zone: 517740 pages, LIFO batch:31 [ 0.000000] Reserved but unavailable: 2555 pages > > Thank you, > Pavel -- []'s Herton