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[23.128.96.18]) by mx.google.com with ESMTP id rk12si3637192ejb.580.2021.02.18.05.37.04; Thu, 18 Feb 2021 05:37:28 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=bbqMqQPt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=suse.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230398AbhBRNcK (ORCPT + 99 others); Thu, 18 Feb 2021 08:32:10 -0500 Received: from mx2.suse.de ([195.135.220.15]:50114 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229919AbhBRLsb (ORCPT ); Thu, 18 Feb 2021 06:48:31 -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=1613648825; 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=vP1S07ca3sqxgRiRY6So84F1f0cq3n+/55ZYZDA6jwQ=; b=bbqMqQPt/mCi0FQMo/l8RuuHzWubuWl+3oL3+ISKNpzdVgWomKjvgyFU4aLwfBrO5r6YSB bBsbYGkktn/vBHy77BiKC4W4Wa5m57T8d12DH4zahL7+jS6c92GYd9iAcQZQ1j0dYFgVu2 SmPIKAaqojOJEWKS/EnIXqK8M2Zhyv0= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 6C8E9AD78; Thu, 18 Feb 2021 11:47:05 +0000 (UTC) Subject: Re: [PATCH v2 3/8] xen/events: avoid handling the same event on two cpus at the same time To: Boris Ostrovsky , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Stefano Stabellini , Julien Grall References: <20210211101616.13788-1-jgross@suse.com> <20210211101616.13788-4-jgross@suse.com> <6cc74d6b-d537-0e9f-9da8-45456f6b703e@oracle.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <63e42922-204d-9d0e-6a02-49f64e7e8885@suse.com> Date: Thu, 18 Feb 2021 12:47:04 +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: <6cc74d6b-d537-0e9f-9da8-45456f6b703e@oracle.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nyMyUXtbBYfCQJffcUfegBSEpdoFj1b9E" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --nyMyUXtbBYfCQJffcUfegBSEpdoFj1b9E Content-Type: multipart/mixed; boundary="aIEYVeglYW0935UFABA3RFn6vG3A7vknV"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Boris Ostrovsky , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Stefano Stabellini , Julien Grall Message-ID: <63e42922-204d-9d0e-6a02-49f64e7e8885@suse.com> Subject: Re: [PATCH v2 3/8] xen/events: avoid handling the same event on two cpus at the same time References: <20210211101616.13788-1-jgross@suse.com> <20210211101616.13788-4-jgross@suse.com> <6cc74d6b-d537-0e9f-9da8-45456f6b703e@oracle.com> In-Reply-To: <6cc74d6b-d537-0e9f-9da8-45456f6b703e@oracle.com> --aIEYVeglYW0935UFABA3RFn6vG3A7vknV Content-Type: multipart/mixed; boundary="------------456ECA628170F25D28062DF7" Content-Language: en-US This is a multi-part message in MIME format. --------------456ECA628170F25D28062DF7 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 15.02.21 22:35, Boris Ostrovsky wrote: >=20 > On 2/11/21 5:16 AM, Juergen Gross wrote: >=20 >> @@ -622,6 +623,7 @@ static void xen_irq_lateeoi_locked(struct irq_info= *info, bool spurious) >> } >> =20 >> info->eoi_time =3D 0; >> + smp_store_release(&info->is_active, 0); >=20 >=20 > Can this be done in lateeoi_ack_dynirq()/lateeoi_mask_ack_dynirq(), aft= er we've masked the channel? Then it will be consistent with how how othe= r chips do it, especially with the new helper. Yes, I think this should work. 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