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=-12.4 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=unavailable 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 543A5C433E0 for ; Thu, 4 Feb 2021 05:33:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25CB964F47 for ; Thu, 4 Feb 2021 05:33:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229711AbhBDFdW (ORCPT ); Thu, 4 Feb 2021 00:33:22 -0500 Received: from mx2.suse.de ([195.135.220.15]:39992 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229609AbhBDFdV (ORCPT ); Thu, 4 Feb 2021 00:33:21 -0500 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=1612416754; 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=7bOPQvy7qTInyB9wYQ9IL2fnW0fKtEjyxYEe1vYqV0c=; b=Hi8wPm5pIzWzXmj5NK+rF+oJbT/b2+PtaRhTiXfHfgTJfcncJB2ngC2gblQQ+UlJDKjA6U CHZAYXOeQmqs2CBkbHEiGWKGL51DEt+JrhuhjLB0DwK6KguPPHTWUQD26pv1uDqNCSdw40 X6zsvPzYwLsYdBde0wCHKwQNNwb7FRk= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id DE6EBAD37; Thu, 4 Feb 2021 05:32:33 +0000 (UTC) Subject: Re: [PATCH] xen/netback: avoid race in xenvif_rx_ring_slots_available() To: Jakub Kicinski Cc: xen-devel@lists.xenproject.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Wei Liu , Paul Durrant , "David S. Miller" , Igor Druzhinin , stable@vger.kernel.org References: <20210202070938.7863-1-jgross@suse.com> <20210203154800.4c6959d6@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: Date: Thu, 4 Feb 2021 06:32:32 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210203154800.4c6959d6@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="mHapG4vhTCP36nbTdrhUC7cqDD240Fsgi" Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --mHapG4vhTCP36nbTdrhUC7cqDD240Fsgi Content-Type: multipart/mixed; boundary="3tMIMW2EI4iG1ylfu3D1bWpPCgMh1TUEY"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Jakub Kicinski Cc: xen-devel@lists.xenproject.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Wei Liu , Paul Durrant , "David S. Miller" , Igor Druzhinin , stable@vger.kernel.org Message-ID: Subject: Re: [PATCH] xen/netback: avoid race in xenvif_rx_ring_slots_available() References: <20210202070938.7863-1-jgross@suse.com> <20210203154800.4c6959d6@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> In-Reply-To: <20210203154800.4c6959d6@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> --3tMIMW2EI4iG1ylfu3D1bWpPCgMh1TUEY Content-Type: multipart/mixed; boundary="------------0650DBEFF4F58FCE9BE6C4D9" Content-Language: en-US This is a multi-part message in MIME format. --------------0650DBEFF4F58FCE9BE6C4D9 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 04.02.21 00:48, Jakub Kicinski wrote: > On Tue, 2 Feb 2021 08:09:38 +0100 Juergen Gross wrote: >> Since commit 23025393dbeb3b8b3 ("xen/netback: use lateeoi irq binding"= ) >> xenvif_rx_ring_slots_available() is no longer called only from the rx >> queue kernel thread, so it needs to access the rx queue with the >> associated queue held. >> >> Reported-by: Igor Druzhinin >> Fixes: 23025393dbeb3b8b3 ("xen/netback: use lateeoi irq binding") >> Cc: stable@vger.kernel.org >> Signed-off-by: Juergen Gross >=20 > Should we route this change via networking trees? I see the bug did not= > go through networking :) >=20 I'm fine with either networking or the Xen tree. It should be included in 5.11, though. So if you are willing to take it, please do so. 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