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=-12.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 8BC23C433C1 for ; Tue, 30 Mar 2021 15:35:36 +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 47983619BC for ; Tue, 30 Mar 2021 15:35:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 47983619BC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org 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.103600.197584 (Exim 4.92) (envelope-from ) id 1lRGOS-0004nA-Gh; Tue, 30 Mar 2021 15:35:00 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 103600.197584; Tue, 30 Mar 2021 15:35:00 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lRGOS-0004n3-DS; Tue, 30 Mar 2021 15:35:00 +0000 Received: by outflank-mailman (input) for mailman id 103600; Tue, 30 Mar 2021 15:34:59 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lRGOR-0004my-HB for xen-devel@lists.xenproject.org; Tue, 30 Mar 2021 15:34:59 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lRGOR-00079Q-Bs; Tue, 30 Mar 2021 15:34:59 +0000 Received: from [54.239.6.177] (helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1lRGOR-0000qJ-4g; Tue, 30 Mar 2021 15:34:59 +0000 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" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:Cc:To:Subject; bh=ENy+w1fUJSGrmxhLkjF6WQR4E5cG0tivYMMh+onII4Q=; b=zq5wQIxdBGKBPWqwIdZNy1obkX v22NJ2j4X+sGz2AbU22MEqmA+b9bV07uROmbBr3W2/0lPqVA5qrXWljEwlzq7intTXJ0b2tMThvo8 EJP0rzvj8gdEumY1DP6mhoffKuM3rxybU7l+0CS63Wei/XcjuCjxK4QTodHhmgI03VoQ=; Subject: Re: [PATCH v2 for-4.15 3/7] CHANGELOG.md: Add dom0/domU zstd compression support To: Jan Beulich , Julien Grall Cc: xen-devel , Ian Jackson , Andrew Cooper , George Dunlap References: <20210329161457.345360-1-george.dunlap@citrix.com> <20210329161457.345360-3-george.dunlap@citrix.com> <87E259CB-2BB4-4BAE-9916-BE46584E0EF4@citrix.com> <672c88ac-8373-6629-4d2f-0d1e86c103cd@suse.com> From: Julien Grall Message-ID: <92f0b44a-84de-457c-ba04-896644382905@xen.org> Date: Tue, 30 Mar 2021 16:34:57 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <672c88ac-8373-6629-4d2f-0d1e86c103cd@suse.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit On 30/03/2021 11:56, Jan Beulich wrote: > On 30.03.2021 12:14, Julien Grall wrote: >> >> >> On 30/03/2021 11:08, George Dunlap wrote: >>> >>> >>>> On Mar 29, 2021, at 7:54 PM, Julien Grall wrote: >>>> >>>> Hi George, >>>> >>>> On Mon, 29 Mar 2021 at 17:15, George Dunlap wrote: >>>>> diff --git a/CHANGELOG.md b/CHANGELOG.md >>>>> index 8c89212f14..538eae611c 100644 >>>>> --- a/CHANGELOG.md >>>>> +++ b/CHANGELOG.md >>>>> @@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) >>>>> - ARM SMMUv3 (Tech Preview) >>>>> - Intel Processor Trace support (Tech Preview) >>>>> - Named PCI devices for xl/libxl >>>>> + - Support for zstd-compressed dom0 and domU kernels >>>> >>>> Looking at the log, the feature looks x86 only (at least the dom0 part). >>> >>> Oh, interesting. So what about the following? >>> >>> - Support for zstd-compressed dom0 (x86) and domU kernels >> >> Sounds fine to me. Note that I haven't tried zstd-compressed for domu >> Kernel on Arm. >> >> Maybe the author (Jan) can confirm whether this was plumbed in common >> libxc code? > > Well, I've followed the model used for other compression methods. I have > no idea what this means or does not mean for Arm; in fact so far I was > under the impression that like in the hypervisor decompression support > was an x86-only feature, but from what you say I conclude I have been > wrong with this. We support gzip for dom0. For guests, I am not entirely sure what the state as I tend to uncompressed kernel every time. Cheers, -- Julien Grall