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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 76170CA9EC7 for ; Sat, 2 Nov 2019 05:42:51 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id BD43621897 for ; Sat, 2 Nov 2019 05:42:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="b7SeZa6u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD43621897 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-17250-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 19765 invoked by uid 550); 2 Nov 2019 05:42:43 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 19728 invoked from network); 2 Nov 2019 05:42:43 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=TwCyoqEqcafVBAPHUZNRzy8O91jgC0yg4si3yhaEWtU=; b=b7SeZa6uSLSeVMfRcXDKUY2jgD2S/63UBZqF1iuSePQLHdZNgl6cX+FVCrl/9jH43W 8XOTcPOYrvz5lzwGE4GKlGamef8tz0zYysAqvmKUVgJb9G6Xzdahv96K76siVeLHbGIv XM0teR8AGj2gia1+1fYJS+bzJ5jiAb3IWKAEKzcyhsAroqrJCqEG/+vh/YXqfiQCQ/tL TeJG4/z/vQ1snltCVjACdCbjyXzEwVJ+WbtwQfC+6lPP5sofec84+bqLZQPjmZJUg27c 9k+Pt792Egckkcc9zkNes/EIi7HgFRzrdeMvcS+E0yZJjvoKxaMJdA3jCqzVS2EtqB3x LlnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=TwCyoqEqcafVBAPHUZNRzy8O91jgC0yg4si3yhaEWtU=; b=sgQFbggC3FoczgrAaeAZwcNrgMTffp0WgeWHX9BHuJQywv49XBHJjHFXZxTzZEoadf 3BplfGWTWskNmt17WGmCBKEZIycw8UPtIjQdpHgouEnWnHyAjPlSxNh+dR3HSw9vc0QM KBP7PBV7bebot3ZFT718YxC0rHNfCjTI/F6OLavTDyN+u5AL+RStxCU5kRoGIO19sqiK b5hrYnUq5w1HwRTaa8szsYJZF7DVKsqdPyV0wSRfQDzXQgahhZQULMiLanVH5VAt5g0E pdMe2V+DZYmRTR1ZE1jdGbc/F8VwH6xIOF5HBtkBJx3w9NCP3Heyzlx4IsdCddTZnEbI 4qtw== X-Gm-Message-State: APjAAAXdmRtr8L+05RtCZdeJHYH7FQqoE4NNFLclmzEgOcbs72D+5Glc CnJOdu29FqG7qtCkz/0VvCyfR01jtRcJPE83P7U= X-Google-Smtp-Source: APXvYqwZkOKcbUtStO616K56Lp9U0G511GomEogcYrPPEV4/Awh/49l+n1f/+oEyq1bU6DmUvC0n7IWWTArPG3r81lc= X-Received: by 2002:a05:6e02:cc1:: with SMTP id c1mr14382738ilj.139.1572673351138; Fri, 01 Nov 2019 22:42:31 -0700 (PDT) MIME-Version: 1.0 References: <2e2a3d3c-872e-3d07-5585-92734a532ef2@gmail.com> In-Reply-To: From: youling 257 Date: Sat, 2 Nov 2019 13:42:17 +0800 Message-ID: Subject: Re: How to get the crash dump if system hangs? To: Lukas Odzioba Cc: Kees Cook , kernel-hardening@lists.openwall.com, munisekharrms@gmail.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On my v891w, i add "memmap=3D1M!2047M ramoops.mem_size=3D1048576 ramoops.ecc=3D1 ramoops.mem_address=3D0x7ff00000 ramoops.console_size=3D16384 ramoops.ftrace_size=3D16384 ramoops.pmsg_size=3D16384 ramoops.record_size=3D32768" boot parameter, [ 0.483935] printk: console [pstore-1] enabled [ 0.484034] pstore: Registered ramoops as persistent store backend [ 0.484121] ramoops: using 0x100000@0x7ff00000, ecc: 16 But on my ezpad 6 m4, i add "memmap=3D1M!4095M ramoops.mem_size=3D1048576 ramoops.ecc=3D1 ramoops.mem_address=3D0xfff00000 ramoops.console_size=3D16384 ramoops.ftrace_size=3D16384 ramoops.pmsg_size=3D16384 ramoops.record_size=3D32768" boot parameter, it can't boot, stop at "boot command list", no anyting happen, no dmesg. I test boot parameter one by one, just add ramoops.mem_size=3D1048576, will cause can't boot. youling 257 =E4=BA=8E2019=E5=B9=B410=E6=9C=8821=E6= =97=A5=E5=91=A8=E4=B8=80 =E4=B8=8B=E5=8D=886:22=E5=86=99=E9=81=93=EF=BC=9A > > When add cmdline memmap=3D1M!2047M, the iomem will be 7ef00001-7fefffff := RAM buffer 7ff00000-7fffffff : Persistent Memory (legacy) 7ff00000-7ff00ff= f : MSFT0101:00, > so ramoops.mem_address=3D0x7ff00000. > > Lukas Odzioba =E4=BA=8E 2019=E5=B9=B410=E6=9C= =8821=E6=97=A5=E5=91=A8=E4=B8=80 =E4=B8=8B=E5=8D=884:39=E5=86=99=E9=81=93= =EF=BC=9A >> >> youling257 wrote: >> > >> > I don't know my ramoops.mem_address, please help me. >> > >> > what is ramoops.mem_address? >> >> It is a Linux kernel parameter, see documentation below: >> https://www.kernel.org/doc/Documentation/admin-guide/ramoops.rst >> >> It requires memory which can hold data between reboots, so i'm not >> sure how it will suit your case. >> >> Thanks, >> Lukas