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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 50E33C64ED6 for ; Tue, 28 Feb 2023 14:04:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QWHTcvoQ5sRDMaO36fo1kW//rVSlDZwhyIruVsQHEZ4=; b=svCSnop0vOOgHP YVFXouAsCtJsnHqgOFvBtYQGpDekADBY48p0wBKfPXWKpVvpzsduoZXsvbmNjssQS0mvH/LdnbtZe ws2mLV333NGM3en/ST6G6bl/PZN4o9+hieQvQAUsvjpS+yIAA89uwwwL8C/sDyVxb5FpHjXN86hly p5qamsln6LsFTAKPFiWziCn0y3x69KkWAUzsbqmNC858d4yy7632/8uqczgjU7d+Pj7OUNPYkZePw LaFgyI5zYe7/PtGinpBCVDLj2sh4k+8351EO8jrrHhVkweHAsRmewJX0zD5caIwQczFtNU99RULae LmORlybqSzmv8Xv70PNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pX0af-00DOYy-Ce; Tue, 28 Feb 2023 14:04:25 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pX0ab-00DOVs-3n for kexec@lists.infradead.org; Tue, 28 Feb 2023 14:04:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1677593051; 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=1ESrld006RWsyPkhdVerW4JO9w3LuFA1DAtayIv7Uao=; b=IGKNQhbH+Jsqio4Fsbym7/ciassEdJQzjXm9uf9C2m5Cz9uY2f6GFw/Nn3dhEeQWzhapb/ uB1Ekqd9PWgAdeCSHQr+Eg7SY7eqxmFBRbcaloZr9nRNh9/3v7sy8NbT0ddCCEtRuaonQM gqNBcfQx+U4GvjZR/IaS+LOvQtFmrHk= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-80-ee3cnWmIMkS4QAFkSqBm9Q-1; Tue, 28 Feb 2023 09:04:05 -0500 X-MC-Unique: ee3cnWmIMkS4QAFkSqBm9Q-1 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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id C74C61871D9A; Tue, 28 Feb 2023 14:03:56 +0000 (UTC) Received: from localhost (ovpn-13-194.pek2.redhat.com [10.72.13.194]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4401418EC6; Tue, 28 Feb 2023 14:03:54 +0000 (UTC) Date: Tue, 28 Feb 2023 22:03:49 +0800 From: Baoquan He To: "lizhijian@fujitsu.com" Cc: "kexec@lists.infradead.org" , "nvdimm@lists.linux.dev" , "linux-mm@kvack.org" , "vgoyal@redhat.com" , "dyoung@redhat.com" , "vishal.l.verma@intel.com" , "dan.j.williams@intel.com" , "dave.jiang@intel.com" , "horms@verge.net.au" , "k-hagio-ab@nec.com" , "akpm@linux-foundation.org" , "Yasunori Gotou (Fujitsu)" , "yangx.jy@fujitsu.com" , "ruansy.fnst@fujitsu.com" Subject: Re: [RFC][nvdimm][crash] pmem memmap dump support Message-ID: References: <3c752fc2-b6a0-2975-ffec-dba3edcf4155@fujitsu.com> MIME-Version: 1.0 In-Reply-To: <3c752fc2-b6a0-2975-ffec-dba3edcf4155@fujitsu.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230228_060422_867897_5A2690D1 X-CRM114-Status: GOOD ( 32.96 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org T24gMDIvMjMvMjMgYXQgMDY6MjRhbSwgbGl6aGlqaWFuQGZ1aml0c3UuY29tIHdyb3RlOgo+IEhl bGxvIGZvbGtzLAo+IAo+IFRoaXMgbWFpbCByYWlzZXMgYSBwbWVtIG1lbW1hcCBkdW1wIHJlcXVp cmVtZW50IGFuZCBwb3NzaWJsZSBzb2x1dGlvbnMsIGJ1dCB0aGV5IGFyZSBhbGwgc3RpbGwgcHJl bWF0dXJlLgo+IEkgcmVhbGx5IGhvcGUgeW91IGNhbiBwcm92aWRlIHNvbWUgZmVlZGJhY2suCj4g Cj4gcG1lbSBtZW1tYXAgY2FuIGFsc28gYmUgY2FsbGVkIHBtZW0gbWV0YWRhdGEgaGVyZS4KPiAK PiAjIyMgQmFja2dyb3VuZCBhbmQgbW90aXZhdGUgb3ZlcnZpZXcgIyMjCj4gLS0tCj4gQ3Jhc2gg ZHVtcCBpcyBhbiBpbXBvcnRhbnQgZmVhdHVyZSBmb3IgdHJvdWJsZSBzaG9vdGluZyBvZiBrZXJu ZWwuIEl0IGlzIHRoZSBmaW5hbCB3YXkgdG8gY2hhc2Ugd2hhdAo+IGhhcHBlbmVkIGF0IHRoZSBr ZXJuZWwgcGFuaWMsIHNsb3dkb3duLCBhbmQgc28gb24uIEl0IGlzIHRoZSBtb3N0IGltcG9ydGFu dCB0b29sIGZvciBjdXN0b21lciBzdXBwb3J0Lgo+IEhvd2V2ZXIsIGEgcGFydCBvZiBkYXRhIG9u IHBtZW0gaXMgbm90IGluY2x1ZGVkIGluIGNyYXNoIGR1bXAsIGl0IG1heSBjYXVzZSBkaWZmaWN1 bHR5IHRvIGFuYWx5emUKPiB0cm91YmxlIGFyb3VuZCBwbWVtIChlc3BlY2lhbGx5IEZpbGVzeXN0 ZW0tREFYKS4KPiAKPiAKPiBBIHBtZW0gbmFtZXNwYWNlIGluICJmc2RheCIgb3IgImRldmRheCIg bW9kZSByZXF1aXJlcyBhbGxvY2F0aW9uIG9mIHBlci1wYWdlIG1ldGFkYXRhWzFdLiBUaGUgYWxs b2NhdGlvbgo+IGNhbiBiZSBkcmF3biBmcm9tIGVpdGhlciBtZW0oc3lzdGVtIG1lbW9yeSkgb3Ig ZGV2KHBtZW0gZGV2aWNlKSwgc2VlIGBuZGN0bCBoZWxwIGNyZWF0ZS1uYW1lc3BhY2VgIGZvcgo+ IG1vcmUgZGV0YWlscy4gSW4gZnNkYXgsIHN0cnVjdCBwYWdlIGFycmF5IGJlY29tZXMgdmVyeSBp bXBvcnRhbnQsIGl0IGlzIG9uZSBvZiB0aGUga2V5IGRhdGEgdG8gZmluZAo+IHN0YXR1cyBvZiBy ZXZlcnNlIG1hcC4KPiAKPiBTbywgd2hlbiBtZXRhZGF0YSB3YXMgc3RvcmVkIGluIHBtZW0sIGV2 ZW4gcG1lbSdzIHBlci1wYWdlIG1ldGFkYXRhIHdpbGwgbm90IGJlIGR1bXBlZC4gVGhhdCBtZWFu cwo+IHRyb3VibGVzaG9vdGVycyBhcmUgdW5hYmxlIHRvIGNoZWNrIG1vcmUgZGV0YWlscyBhYm91 dCBwbWVtIGZyb20gdGhlIGR1bXBmaWxlLgo+IAo+ICMjIyBNYWtlIHBtZW0gbWVtbWFwIGR1bXAg c3VwcG9ydCAjIyMKPiAtLS0KPiBPdXIgZ29hbCBpcyB0aGF0IHdoZXRoZXIgbWV0YWRhdGEgaXMg c3RvcmVkIG9uIG1lbSBvciBwbWVtLCBpdHMgbWV0YWRhdGEgY2FuIGJlIGR1bXBlZCBhbmQgdGhl biB0aGUKPiBjcmFzaC11dGlsaXRpZXMgY2FuIHJlYWQgbW9yZSBkZXRhaWxzIGFib3V0IHRoZSBw bWVtLiBPZiBjb3Vyc2UsIHRoaXMgZmVhdHVyZSBjYW4gYmUgZW5hYmxlZC9kaXNhYmxlZC4KPiAK PiBGaXJzdCwgYmFzZWQgb24gb3VyIHByZXZpb3VzIGludmVzdGlnYXRpb24sIGFjY29yZGluZyB0 byB0aGUgbG9jYXRpb24gb2YgbWV0YWRhdGEgYW5kIHRoZSBzY29wZSBvZgo+IGR1bXAsIHdlIGNh biBkaXZpZGUgaXQgaW50byB0aGUgZm9sbG93aW5nIGZvdXIgY2FzZXM6IEEsIEIsIEMsIEQuCj4g SXQgc2hvdWxkIGJlIG5vdGVkIHRoYXQgYWx0aG91Z2ggd2UgbWVudGlvbmVkIGNhc2UgQSZCIGJl bG93LCB3ZSBkbyBub3Qgd2FudCB0aGVzZSB0d28gY2FzZXMgdG8gYmUKPiBwYXJ0IG9mIHRoaXMg ZmVhdHVyZSwgYmVjYXVzZSBkdW1waW5nIHRoZSBlbnRpcmUgcG1lbSB3aWxsIGNvbnN1bWUgYSBs b3Qgb2Ygc3BhY2UsIGFuZCBtb3JlIGltcG9ydGFudGx5LAo+IGl0IG1heSBjb250YWluIHVzZXIg c2Vuc2l0aXZlIGRhdGEuCj4gCj4gKy0tLS0tLS0tLS0tLS0rLS0tLS0tLS0tLSstLS0tLS0tLS0t LS0rCj4gfFwrLS0tLS0tLS0rXCAgICAgbWV0YWRhdGEgbG9jYXRpb24gICB8Cj4gfCAgICAgICAg ICAgICsrLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0rCj4gfCBkdW1wIHNjb3BlICB8ICBtZW0gICAg IHwgICBQTUVNICAgICB8Cj4gKy0tLS0tLS0tLS0tLS0rLS0tLS0tLS0tLSstLS0tLS0tLS0tLS0r Cj4gfCBlbnRpcmUgcG1lbSB8ICAgICBBICAgIHwgICAgIEIgICAgICB8Cj4gKy0tLS0tLS0tLS0t LS0rLS0tLS0tLS0tLSstLS0tLS0tLS0tLS0rCj4gfCBtZXRhZGF0YSAgICB8ICAgICBDICAgIHwg ICAgIEQgICAgICB8Cj4gKy0tLS0tLS0tLS0tLS0rLS0tLS0tLS0tLSstLS0tLS0tLS0tLS0rCj4g Cj4gQ2FzZSBBJkI6IHVuc3VwcG9ydGVkCj4gLSBPbmx5IHRoZSByZWdpb25zIGxpc3RlZCBpbiBQ VF9MT0FEIGluIHZtY29yZSBhcmUgZHVtcGFibGUuIFRoaXMgY2FuIGJlIHJlc29sdmVkIGJ5IGFk ZGluZyB0aGUgcG1lbQo+IHJlZ2lvbiBpbnRvIHZtY29yZSdzIFBUX0xPQURzIGluIGtleGVjLXRv b2xzLgo+IC0gRm9yIG1ha2VkdW1wZmlsZSB3aGljaCB3aWxsIGFzc3VtZSB0aGF0IGFsbCBwYWdl IG9iamVjdHMgb2YgdGhlIGVudGlyZSByZWdpb24gZGVzY3JpYmVkIGluIFBUX0xPQURzCj4gYXJl IHJlYWRhYmxlLCBhbmQgdGhlbiBza2lwcy9leGNsdWRlcyB0aGUgc3BlY2lmaWMgcGFnZSBhY2Nv cmRpbmcgdG8gaXRzIGF0dHJpYnV0ZXMuIEJ1dCBpbiB0aGUgY2FzZQo+IG9mIHBtZW0sIDFzdCBr ZXJuZWwgb25seSBhbGxvY2F0ZXMgcGFnZSBvYmplY3RzIGZvciB0aGUgbmFtZXNwYWNlcyBvZiBw bWVtLCBzbyBtYWtlZHVtcGZpbGUgd2lsbCB0aHJvdwo+IGVycm9yc1syXSB3aGVuIHNwZWNpZmlj IC1kIG9wdGlvbnMgYXJlIHNwZWNpZmllZC4KPiBBY2NvcmRpbmdseSwgd2Ugc2hvdWxkIG1ha2Ug bWFrZWR1bXBmaWxlIHRvIGlnbm9yZSB0aGVzZSBlcnJvcnMgaWYgaXQncyBwbWVtIHJlZ2lvbi4K PiAKPiBCZWNhdXNlIHRoZXNlIGFib3ZlIGNhc2VzIGFyZSBub3QgaW4gb3VyIGdvYWwsIHdlIG11 c3QgY29uc2lkZXIgaG93IHRvIHByZXZlbnQgdGhlIGRhdGEgcGFydCBvZiBwbWVtCj4gZnJvbSBy ZWFkaW5nIGJ5IHRoZSBkdW1wIGFwcGxpY2F0aW9uKG1ha2VkdW1wZmlsZSkuCj4gCj4gQ2FzZSBD OiBuYXRpdmUgc3VwcG9ydGVkCj4gbWV0YWRhdGEgaXMgc3RvcmVkIGluIG1lbSwgYW5kIHRoZSBl bnRpcmUgbWVtL3JhbSBpcyBkdW1wYWJsZS4KPiAKPiBDYXNlIEQ6IHVuc3VwcG9ydGVkICYmIG5l ZWQgeW91ciBpbnB1dAo+IFRvIHN1cHBvcnQgdGhpcyBzaXR1YXRpb24sIHRoZSBtYWtlZHVtcGZp bGUgbmVlZHMgdG8ga25vdyB0aGUgbG9jYXRpb24gb2YgbWV0YWRhdGEgZm9yIGVhY2ggcG1lbQo+ IG5hbWVzcGFjZSBhbmQgdGhlIGFkZHJlc3MgYW5kIHNpemUgb2YgbWV0YWRhdGEgaW4gdGhlIHBt ZW0gW3N0YXJ0LCBlbmQpCj4gCj4gV2UgaGF2ZSB0aG91Z2h0IG9mIGEgZmV3IHBvc3NpYmxlIG9w dGlvbnM6Cj4gCj4gMSkgSW4gdGhlIDJuZCBrZXJuZWwsIHdpdGggdGhlIGhlbHAgb2YgdGhlIGlu Zm9ybWF0aW9uIGZyb20gL3N5cy9idXMvbmQvZGV2aWNlcy97bmFtZXNwYWNlWC5ZLCBkYXhYLlks IHBmblguWX0KPiBleHBvcnRlZCBieSBwbWVtIGRyaXZlcnMsIG1ha2VkdW1wZmlsZSBpcyBhYmxl IHRvIGNhbGN1bGF0ZSB0aGUgYWRkcmVzcyBhbmQgc2l6ZSBvZiBtZXRhZGF0YQo+IDIpIEluIHRo ZSAxc3Qga2VybmVsLCBhZGQgYSBuZXcgc3ltYm9sIHRvIHRoZSB2bWNvcmUuIFRoZSBzeW1ib2wg aXMgYXNzb2NpYXRlZCB3aXRoIHRoZSBsYXlvdXQgb2YKPiBlYWNoIG5hbWVzcGFjZS4gVGhlIG1h a2VkdW1wZmlsZSByZWFkcyB0aGUgc3ltYm9sIGFuZCBmaWd1cmVzIG91dCB0aGUgYWRkcmVzcyBh bmQgc2l6ZSBvZiB0aGUgbWV0YWRhdGEuCj4gMykgb3RoZXJzID8KPiAKPiBCdXQgdGhlbiB3ZSBm b3VuZCB0aGF0IHdlIGhhdmUgYWx3YXlzIGlnbm9yZWQgYSB1c2VyIGNhc2UsIHRoYXQgaXMsIHRo ZSB1c2VyIGNvdWxkIHNhdmUgdGhlIGR1bXBmaWxlCj4gdG8gdGhlIHBtZW0uIE5laXRoZXIgb2Yg dGhlc2UgdHdvIG9wdGlvbnMgY2FuIHNvbHZlIHRoaXMgcHJvYmxlbSwgYmVjYXVzZSB0aGUgcG1l bSBkcml2ZXJzIHdpbGwKPiByZS1pbml0aWFsaXplIHRoZSBtZXRhZGF0YSBkdXJpbmcgdGhlIHBt ZW0gZHJpdmVycyBsb2FkaW5nIHByb2Nlc3MsIHdoaWNoIGxlYWRzIHRvIHRoZSBtZXRhZGF0YQo+ IHdlIGR1bXBlZCBpcyBpbmNvbnNpc3RlbnQgd2l0aCB0aGUgbWV0YWRhdGEgYXQgdGhlIG1vbWVu dCBvZiB0aGUgY3Jhc2ggaGFwcGVuaW5nLgo+IFNpbXBseSwgY2FuIHdlIGp1c3QgZGlzYWJsZSB0 aGUgcG1lbSBkaXJlY3RseSBpbiAybmQga2VybmVsIHNvIHRoYXQgcHJldmlvdXMgbWV0YWRhdGEg d2lsbCBub3QgYmUKPiBkZXN0cm95ZWQ/IEJ1dCB0aGlzIG9wZXJhdGlvbiB3aWxsIGJyaW5nIHVz IGluY29udmVuaWVuY2UgdGhhdCAybmQga2VybmVsIGRvZXNu4oCZdCBhbGxvdyB1c2VyIHN0b3Jp bmcKPiBkdW1wZmlsZSBvbiB0aGUgZmlsZXN5c3RlbS9wYXJ0aXRpb24gYmFzZWQgb24gcG1lbS4K CjEpIEluIGtlcm5lbCBzaWRlLCBleHBvcnQgaW5mbyBvZiBwbWVtIG1ldGEgZGF0YTsKMikgaW4g bWFrZWR1bXBmaWxlIHNpemUsIGFkZCBhbiBvcHRpb24gdG8gc3BlY2lmeSBpZiB3ZSB3YW50IHRv IGR1bXAKICAgcG1lbSBtZXRhIGRhdGE7IEFuIG9wdGlvbiBvciBpbiBkdW1wIGxldmVsPwozKSBJ biBnbHVlIHNjcmlwdCwgZGV0ZWN0IGFuZCB3YXJuIGlmIHBtZW0gZGF0YSBpcyBpbiBwbWVtIGFu ZCB3YW50ZWQsCiAgIGFuZCBkdW1wIHRhcmdldCBpcyB0aGUgc2FtZSBwbWVtLgoKRG9lcyB0aGlz IHdvcmsgZm9yIHlvdT8KCk5vdCBzdXJlIGlmIGFib3ZlIGl0ZW1zIGFyZSBhbGwgZG8tYWJsZS4g QXMgZm9yIHBhcmtpbmcgcG1lbSBkZXZpY2UKdGlsbCBpbiBrZHVtcCBrZXJuZWwsIEkgYmVsaWV2 ZSBpbnRlbCBwbWVtIGV4cGVydCBrbm93IGhvdyB0byBhY2hpZXZlCnRoYXQuIElmIHRoZXJlJ3Mg bm8gd2F5IHRvIHBhcmsgcG1lbSBkdXJpbmcga2R1bXAganVtcGluZywgY2FzZSBEKSBpcwpkYXlk cmVhbS4KClRoYW5rcwpCYW9xdWFuCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3RzLmluZnJhZGVhZC5v cmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9rZXhlYwo=