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=-12.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, 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 132ABC433FE for ; Wed, 9 Dec 2020 11:17:36 +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 AF47F23407 for ; Wed, 9 Dec 2020 11:17:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AF47F23407 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.48137.85106 (Exim 4.92) (envelope-from ) id 1kmxSu-0003QK-2U; Wed, 09 Dec 2020 11:17:00 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 48137.85106; Wed, 09 Dec 2020 11:17:00 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kmxSt-0003QD-V2; Wed, 09 Dec 2020 11:16:59 +0000 Received: by outflank-mailman (input) for mailman id 48137; Wed, 09 Dec 2020 11:16:58 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kmxSs-0003Q8-1q for xen-devel@lists.xenproject.org; Wed, 09 Dec 2020 11:16:58 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kmxSq-0005rB-07; Wed, 09 Dec 2020 11:16:56 +0000 Received: from [54.239.6.186] (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 1kmxSp-0003EZ-N4; Wed, 09 Dec 2020 11:16:55 +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=LMVuGsN2J17uA7dGWuaJGpfZYc8eBmei0dEK7x+yVzM=; b=ayjfQT22rZNujy9mpFgu1SekJ1 RPxQ/vlQns4WVyhRomGGK/Mg/a2CDgF7sILKhdph05lF2FilgnbO9/7qhAadeJnpxGtPJLHEpMRW0 LN1Dpq0IQu6lRbB5BI9MaBhMBAtMN9vDo31X9GLwwHq6YlO8hWfsuLOcoCtX6njInJWc=; Subject: Re: [PATCH v3 3/5] evtchn: convert vIRQ lock to an r/w one To: Jan Beulich , "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , George Dunlap , Ian Jackson , Wei Liu , Stefano Stabellini References: <9d7a052a-6222-80ff-cbf1-612d4ca50c2a@suse.com> From: Julien Grall Message-ID: Date: Wed, 9 Dec 2020 11:16:53 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Hi Jan, On 23/11/2020 13:28, Jan Beulich wrote: > There's no need to serialize all sending of vIRQ-s; all that's needed > is serialization against the closing of the respective event channels > (so far by means of a barrier). To facilitate the conversion, switch to > an ordinary write locked region in evtchn_close(). > > Signed-off-by: Jan Beulich Reviewed-by: Julien Grall Cheers, -- Julien Grall