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=-7.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 80D09C43461 for ; Fri, 4 Sep 2020 06:40:46 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44629206B8 for ; Fri, 4 Sep 2020 06:40:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VI+dLnHN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44629206B8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zKRkJG7f/uL1EtCd1P6KMgXablqeC+2gi+5vv0EOcVE=; b=VI+dLnHNQelH3ylmJ/TI04cDR b9ENtTMkFxU+0S/P6lzivuuDsKMEapgaZNk4bPoS3+fNtK3Y/MAiWnDT76prEqNcDQ7/ZDOzJH/QZ qnTDUIjVft5WensX3uV+dalyKv4c6nETp92ptBcofXNAM1A90WhIBHnr7X2ZA9zcaQdjsnolkvQUD opU6hnresAEq+QJTz7Kkobhe8S9yLo4k6rOCvwrDM2WcCQaoyIKpNWWvVbtNpZlrauGxVFMAPqKui ZO1Yj5J5MvQI2v9qtBUSKYI+l+EI72/n23Zy/E6hbgNvRUsJzFwg2Al5iC3ybVHZVhkVNClcNz+WL TZAyINvSQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE5Nw-0002UO-0e; Fri, 04 Sep 2020 06:39:44 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190] helo=huawei.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE5Ns-0002TL-LT; Fri, 04 Sep 2020 06:39:41 +0000 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id D6B3E21013686CF35EC2; Fri, 4 Sep 2020 14:39:33 +0800 (CST) Received: from [127.0.0.1] (10.174.176.220) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.487.0; Fri, 4 Sep 2020 14:39:23 +0800 Subject: Re: [PATCH v11 3/5] arm64: kdump: reimplement crashkernel=X To: Dave Young References: <20200801130856.86625-1-chenzhou10@huawei.com> <20200801130856.86625-4-chenzhou10@huawei.com> <20200902170910.GB16673@gaia> <20200904030424.GA11384@dhcp-128-65.nay.redhat.com> <20200904031014.GA11869@dhcp-128-65.nay.redhat.com> <20200904041633.GB11869@dhcp-128-65.nay.redhat.com> From: chenzhou Message-ID: <886c91a3-6729-e534-4d9d-b807c5584892@huawei.com> Date: Fri, 4 Sep 2020 14:39:21 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 MIME-Version: 1.0 In-Reply-To: <20200904041633.GB11869@dhcp-128-65.nay.redhat.com> X-Originating-IP: [10.174.176.220] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200904_023940_945319_C2A5F5E7 X-CRM114-Status: GOOD ( 20.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wangkefeng.wang@huawei.com, linux-doc@vger.kernel.org, Catalin Marinas , bhsharma@redhat.com, huawei.libin@huawei.com, guohanjun@huawei.com, will@kernel.org, bhe@redhat.com, corbet@lwn.net, mingo@redhat.com, John.P.donnelly@oracle.com, arnd@arndb.de, xiexiuqi@huawei.com, horms@verge.net.au, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, james.morse@arm.com, prabhakar.pkin@gmail.com, nsaenzjulienne@suse.de Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org CgpPbiAyMDIwLzkvNCAxMjoxNiwgRGF2ZSBZb3VuZyB3cm90ZToKPiBPbiAwOS8wNC8yMCBhdCAx MjowMnBtLCBjaGVuemhvdSB3cm90ZToKPj4KPj4gT24gMjAyMC85LzQgMTE6MTAsIERhdmUgWW91 bmcgd3JvdGU6Cj4+PiBPbiAwOS8wNC8yMCBhdCAxMTowNGFtLCBEYXZlIFlvdW5nIHdyb3RlOgo+ Pj4+IE9uIDA5LzAzLzIwIGF0IDA3OjI2cG0sIGNoZW56aG91IHdyb3RlOgo+Pj4+PiBIaSBDYXRh bGluLAo+Pj4+Pgo+Pj4+Pgo+Pj4+PiBPbiAyMDIwLzkvMyAxOjA5LCBDYXRhbGluIE1hcmluYXMg d3JvdGU6Cj4+Pj4+PiBPbiBTYXQsIEF1ZyAwMSwgMjAyMCBhdCAwOTowODo1NFBNICswODAwLCBD aGVuIFpob3Ugd3JvdGU6Cj4+Pj4+Pj4gVGhlcmUgYXJlIGZvbGxvd2luZyBpc3N1ZXMgaW4gYXJt NjQga2R1bXA6Cj4+Pj4+Pj4gMS4gV2UgdXNlIGNyYXNoa2VybmVsPVggdG8gcmVzZXJ2ZSBjcmFz aGtlcm5lbCBiZWxvdyA0Rywgd2hpY2gKPj4+Pj4+PiB3aWxsIGZhaWwgd2hlbiB0aGVyZSBpcyBu byBlbm91Z2ggbG93IG1lbW9yeS4KPj4+Pj4+PiAyLiBJZiByZXNlcnZpbmcgY3Jhc2hrZXJuZWwg YWJvdmUgNEcsIGluIHRoaXMgY2FzZSwgY3Jhc2ggZHVtcAo+Pj4+Pj4+IGtlcm5lbCB3aWxsIGJv b3QgZmFpbHVyZSBiZWNhdXNlIHRoZXJlIGlzIG5vIGxvdyBtZW1vcnkgYXZhaWxhYmxlCj4+Pj4+ Pj4gZm9yIGFsbG9jYXRpb24uCj4+Pj4+Pj4gMy4gU2luY2UgY29tbWl0IDFhOGUxY2VmNzYwMyAo ImFybTY0OiB1c2UgYm90aCBaT05FX0RNQSBhbmQgWk9ORV9ETUEzMiIpLAo+Pj4+Pj4+IGlmIHRo ZSBtZW1vcnkgcmVzZXJ2ZWQgZm9yIGNyYXNoIGR1bXAga2VybmVsIGZhbGxlZCBpbiBaT05FX0RN QTMyLAo+Pj4+Pj4+IHRoZSBkZXZpY2VzIGluIGNyYXNoIGR1bXAga2VybmVsIG5lZWQgdG8gdXNl IFpPTkVfRE1BIHdpbGwgYWxsb2MKPj4+Pj4+PiBmYWlsLgo+Pj4+Pj4+Cj4+Pj4+Pj4gVG8gc29s dmUgdGhlc2UgaXNzdWVzLCBjaGFuZ2UgdGhlIGJlaGF2aW9yIG9mIGNyYXNoa2VybmVsPVguCj4+ Pj4+Pj4gY3Jhc2hrZXJuZWw9WCB0cmllcyBsb3cgYWxsb2NhdGlvbiBpbiBaT05FX0RNQSwgYW5k IGZhbGwgYmFjayB0bwo+Pj4+Pj4+IGhpZ2ggYWxsb2NhdGlvbiBpZiBpdCBmYWlscy4KPj4+Pj4+ Pgo+Pj4+Pj4+IElmIHJlcXVpemVkIHNpemUgWCBpcyB0b28gbGFyZ2UgYW5kIGxlYWRzIHRvIHZl cnkgbGl0dGxlIGZyZWUgbWVtb3J5Cj4+Pj4+Pj4gaW4gWk9ORV9ETUEgYWZ0ZXIgbG93IGFsbG9j YXRpb24sIHRoZSBzeXN0ZW0gbWF5IG5vdCB3b3JrIG5vcm1hbGx5Lgo+Pj4+Pj4+IFNvIGFkZCBh IHRocmVzaG9sZCBhbmQgZ28gZm9yIGhpZ2ggYWxsb2NhdGlvbiBkaXJlY3RseSBpZiB0aGUgcmVx dWlyZWQKPj4+Pj4+PiBzaXplIGlzIHRvbyBsYXJnZS4gVGhlIHZhbHVlIG9mIHRocmVzaG9sZCBp cyBzZXQgYXMgdGhlIGhhbGYgb2YKPj4+Pj4+PiB0aGUgbG93IG1lbW9yeS4KPj4+Pj4+Pgo+Pj4+ Pj4+IElmIGNyYXNoX2Jhc2UgaXMgb3V0c2lkZSBaT05FX0RNQSwgdHJ5IHRvIGFsbG9jYXRlIGF0 IGxlYXN0IDI1Nk0gaW4KPj4+Pj4+PiBaT05FX0RNQSBhdXRvbWF0aWNhbGx5LiAiY3Jhc2hrZXJu ZWw9WSxsb3ciIGNhbiBiZSB1c2VkIHRvIGFsbG9jYXRlCj4+Pj4+Pj4gc3BlY2lmaWVkIHNpemUg bG93IG1lbW9yeS4KPj4+Pj4+IEV4Y2VwdCBmb3IgdGhlIHRocmVzaG9sZCB0byBrZWVwIHpvbmUg Wk9ORV9ETUEgbWVtb3J5LAo+Pj4+Pj4gcmVzZXJ2ZV9jcmFzaGtlcm5lbCgpIGxvb2tzIHZlcnkg Y2xvc2UgdG8gdGhlIHg4NiB2ZXJzaW9uLiBTaGFsbCB3ZSB0cnkKPj4+Pj4+IHRvIG1ha2UgdGhp cyBnZW5lcmljIGFzIHdlbGw/IEluIHRoZSBmaXJzdCBpbnN0YW5jZSwgeW91IGNvdWxkIGF2b2lk IHRoZQo+Pj4+Pj4gdGhyZXNob2xkIGNoZWNrIGlmIGl0IHRha2VzIGFuIGV4cGxpY2l0ICIsaGln aCIgb3B0aW9uLgo+Pj4+PiBPaywgaSB3aWxsIHRyeSB0byBkbyB0aGlzLgo+Pj4+Pgo+Pj4+PiBJ IGxvb2sgaW50byB0aGUgZnVuY3Rpb24gcmVzZXJ2ZV9jcmFzaGtlcm5lbCgpIG9mIHg4NiBhbmQg Zm91bmQgdGhlIHN0YXJ0IGFkZHJlc3MgaXMKPj4+Pj4gQ1JBU0hfQUxJR04gaW4gZnVuY3Rpb24g bWVtYmxvY2tfZmluZF9pbl9yYW5nZSgpLCB3aGljaCBpcyBkaWZmZXJlbnQgd2l0aCBhcm02NC4K Pj4+Pj4KPj4+Pj4gSSBkb24ndCBmaWd1cmUgb3V0IHdoeSBpcyBDUkFTSF9BTElHTiBpbiB4ODYs IGlzIHRoZXJlIGFueSBzcGVjaWZpYyByZWFzb24/Cj4+Pj4gSG1tLCB0b29rIGFub3RoZXIgbG9v ayBhdCB0aGUgb3B0aW9uIENPTkZJR19QSFlTSUNBTF9BTElHTgo+Pj4+IGNvbmZpZyBQSFlTSUNB TF9BTElHTgo+Pj4+ICAgICAgICAgaGV4ICJBbGlnbm1lbnQgdmFsdWUgdG8gd2hpY2gga2VybmVs IHNob3VsZCBiZSBhbGlnbmVkIgo+Pj4+ICAgICAgICAgZGVmYXVsdCAiMHgyMDAwMDAiCj4+Pj4g ICAgICAgICByYW5nZSAweDIwMDAgMHgxMDAwMDAwIGlmIFg4Nl8zMgo+Pj4+ICAgICAgICAgcmFu Z2UgMHgyMDAwMDAgMHgxMDAwMDAwIGlmIFg4Nl82NAo+Pj4+Cj4+Pj4gQWNjb3JkaW5nIHRvIGFi b3ZlLCBJIHRoaW5rIHRoZSAxNk0gc2hvdWxkIGNvbWUgZnJvbSB0aGUgbGFyZ2VzdCB2YWx1ZQo+ Pj4+IEJ1dCB0aGUgZGVmYXVsdCB2YWx1ZSBpcyAyTSwgIHdpdGggc21hbGxlciB2YWx1ZSByZXNl cnZhdGlvbiBjYW4gaGF2ZQo+Pj4+IG1vcmUgY2hhbmNlIHRvIHN1Y2NlZWQuCj4+Pj4KPj4+PiBJ dCBzZWVtcyB3ZSBzdGlsbCBuZWVkIGFyY2ggc3BlY2lmaWMgQ1JBU0hfQUxJR04sIGJ1dCB0aGUg aW5pdGlhbAo+Pj4+IHZlcnNpb24geW91IGFkZGVkIHRoZSAjaWZkZWYgZm9yIGRpZmZlcmVudCBh cmNoZXMsIGNhbiB5b3UgbW92ZSB0aGUKPj4+PiBtYWNybyB0byBhcmNoIHNwZWNpZmljIGhlYWRl cnM/Cj4+PiBBbmQganVzdCBrZWVwIHRoZSB4ODYgYWxpZ24gdmFsdWUgYXMgaXMsIEkgY2FuIHRy eSB0byBjaGFuZ2UgdGhlIHg4Ngo+Pj4gdmFsdWUgbGF0ZXIgdG8gQ09ORklHX1BIWVNJQ0FMX0FM SUdOLCBpbiB0aGlzIHdheSB0aGlzIHNlcmllcyBjYW4gYmUKPj4+IGNsZWFuZXIuCj4+IE9rLiBJ IGhhdmUgbm8gcXVlc3Rpb24gYWJvdXQgdGhlIHZhbHVlIG9mIG1hY3JvIENSQVNIX0FMSUdOLAo+ PiBpbnN0ZWFkIHRoZSBsb3dlciBib3VuZCBvZiBtZW1ibG9ja19maW5kX2luX3JhbmdlKCkuCj4+ Cj4+IEZvciB4ODYsIGluIHJlc2VydmVfY3Jhc2hrZXJuZWwoKe+8jHJlc3RyaWN0IHRoZSBsb3dl ciBib3VuZCBvZiB0aGUgcmFuZ2UgdG8gQ1JBU0hfQUxJR04sCj4+ICAgICAuLi4KPj4gICAgIGNy YXNoX2Jhc2UgPSBtZW1ibG9ja19maW5kX2luX3JhbmdlKENSQVNIX0FMSUdOLAo+PiAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBDUkFTSF9BRERSX0xPV19N QVgsCj4+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGNy YXNoX3NpemUsIENSQVNIX0FMSUdOKTsKPj4gICAgIC4uLgo+PiAgICAKPj4gaW4gcmVzZXJ2ZV9j cmFzaGtlcm5lbF9sb3coKe+8jHdpdGggbm8gdGhpcyByZXN0cmljdGlvbi4KPj4gICAgIC4uLgo+ PiAgICAgbG93X2Jhc2UgPSBtZW1ibG9ja19maW5kX2luX3JhbmdlKDAsIDFVTEwgPDwgMzIsIGxv d19zaXplLCBDUkFTSF9BTElHTik7Cj4+ICAgICAuLi4KPj4KPj4gSG93IGFib3V0IGFsbCBtYWtp bmcgbWVtYmxvY2tfZmluZF9pbl9yYW5nZSgpIHNlYXJjaCBmcm9tIHRoZSBzdGFydCBvZiBtZW1v cnk/Cj4+IElmIGl0IGlzIG9rLCBpIHdpbGwgZG8gbGlrZSB0aGlzIGluIHRoZSBnZW5lcmljIHZl cnNpb24uCj4gSSBmZWVsIHN0YXJ0aW5nIHdpdGggQ1JBU0hfQUxJR04gc291bmRzIGJldHRlciwg Y2FuIHlvdSBqdXN0IHNlYXJjaCBmcm9tCj4gQ1JBU0hfQUxJR04gaW4gZ2VuZXJpYyB2ZXJzaW9u Pwpvay4KPgo+IFRoYW5rcwo+IERhdmUKPgo+Cj4gLgo+CgoKCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0 CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFk ZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK