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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,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 5F68FC433DB for ; Fri, 5 Mar 2021 14:41:27 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 2297564F48 for ; Fri, 5 Mar 2021 14:41:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2297564F48 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.93772.177025 (Exim 4.92) (envelope-from ) id 1lIBdk-00080G-0h; Fri, 05 Mar 2021 14:41:16 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 93772.177025; Fri, 05 Mar 2021 14:41:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lIBdj-000809-Tw; Fri, 05 Mar 2021 14:41:15 +0000 Received: by outflank-mailman (input) for mailman id 93772; Fri, 05 Mar 2021 14:41:15 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lIBdj-000804-ED for xen-devel@lists.xenproject.org; Fri, 05 Mar 2021 14:41:15 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 6a5865a0-ed79-41ef-9a11-0534f7b1203e; Fri, 05 Mar 2021 14:41:14 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 79AB6AD21; Fri, 5 Mar 2021 14:41:13 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 6a5865a0-ed79-41ef-9a11-0534f7b1203e X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1614955273; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=HzQNZCrEbw4KTTCdbM/r1ka691FZnsHvloTqftMum1E=; b=GebOF6MlGCInyA18gBbPvvQC2Q+ITdljyKgUbT0Z92noyx2FHPLL4AqCL/YwAUtqfVKtyC NH9NdQf5NUSxsKvID4s3wLtbaFr0A3PmTdEg24A2ICk3ECpGG0k2cLZMA2bFV2fhWFBGii lq21+mI3BDOsWhmAec15AwMKLctlido= Subject: Re: [PATCH for-4.15] tools/xenstored: liveupdate: Increase the maximum number of parameters To: Ian Jackson Cc: Julien Grall , xen-devel@lists.xenproject.org, raphning@amazon.co.uk, Julien Grall References: <20210305121029.7047-1-julien@xen.org> <24642.12417.651929.972294@mariner.uk.xensource.com> <24642.16967.563767.105312@mariner.uk.xensource.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <817a49d7-5f11-e53f-5bf5-55d22b157bec@suse.com> Date: Fri, 5 Mar 2021 15:41:12 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <24642.16967.563767.105312@mariner.uk.xensource.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="l7UXiVopusa6i4qlPzRzSNnH7vT4HwEJO" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --l7UXiVopusa6i4qlPzRzSNnH7vT4HwEJO Content-Type: multipart/mixed; boundary="Eo0EOk00XuwapJAXfiYGYbOH1HdH0lZXZ"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Ian Jackson Cc: Julien Grall , xen-devel@lists.xenproject.org, raphning@amazon.co.uk, Julien Grall Message-ID: <817a49d7-5f11-e53f-5bf5-55d22b157bec@suse.com> Subject: Re: [PATCH for-4.15] tools/xenstored: liveupdate: Increase the maximum number of parameters References: <20210305121029.7047-1-julien@xen.org> <24642.12417.651929.972294@mariner.uk.xensource.com> <24642.16967.563767.105312@mariner.uk.xensource.com> In-Reply-To: <24642.16967.563767.105312@mariner.uk.xensource.com> --Eo0EOk00XuwapJAXfiYGYbOH1HdH0lZXZ Content-Type: multipart/mixed; boundary="------------E7E2648399477CF9AE129148" Content-Language: en-US This is a multi-part message in MIME format. --------------E7E2648399477CF9AE129148 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 05.03.21 15:37, Ian Jackson wrote: > J=C3=BCrgen Gro=C3=9F writes ("Re: [PATCH for-4.15] tools/xenstored: li= veupdate: Increase the maximum number of parameters"): >> This is the max number of 0 delimited string parameters. Especially th= e >> stubdom case needs a binary blob (with length, of course) as parameter= , >> and the number of 0 bytes in this data is just limited by the allowed >> payload length. >> >> See the comment in line 111 of xenstored_control.c. >=20 > AFAICT this "live-update" command is variadic. So why is this > parameter set here it all then ? In order to avoid allocating an array for 4000 arguments when there are only 5 which need to be treated as strings. 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