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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 4F3BCC63777 for ; Fri, 20 Nov 2020 08:53:20 +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 AB26322253 for ; Fri, 20 Nov 2020 08:53:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AB26322253 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=antioche.eu.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.31757.62404 (Exim 4.92) (envelope-from ) id 1kg2AD-0006bP-RW; Fri, 20 Nov 2020 08:53:05 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 31757.62404; Fri, 20 Nov 2020 08:53:05 +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" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kg2AD-0006bI-Ne; Fri, 20 Nov 2020 08:53:05 +0000 Received: by outflank-mailman (input) for mailman id 31757; Fri, 20 Nov 2020 08:53:04 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kg2AC-0006bC-EJ for xen-devel@lists.xenproject.org; Fri, 20 Nov 2020 08:53:04 +0000 Received: from chassiron.antioche.eu.org (unknown [2001:41d0:fe9d:1101::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 7d767c42-fd55-44c6-bd1a-6a07adcf4f25; Fri, 20 Nov 2020 08:53:03 +0000 (UTC) Received: from sandettie.soc.lip6.fr (82-64-3-41.subs.proxad.net [82.64.3.41]) by chassiron.antioche.eu.org (8.15.2/8.15.2) with ESMTPS id 0AK8qs0H019108 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=OK); Fri, 20 Nov 2020 09:52:55 +0100 (MET) Received: by sandettie.soc.lip6.fr (Postfix, from userid 373) id C0BEC2E9CA8; Fri, 20 Nov 2020 09:52:49 +0100 (MET) Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kg2AC-0006bC-EJ for xen-devel@lists.xenproject.org; Fri, 20 Nov 2020 08:53:04 +0000 X-Inumbo-ID: 7d767c42-fd55-44c6-bd1a-6a07adcf4f25 Received: from chassiron.antioche.eu.org (unknown [2001:41d0:fe9d:1101::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 7d767c42-fd55-44c6-bd1a-6a07adcf4f25; Fri, 20 Nov 2020 08:53:03 +0000 (UTC) Received: from sandettie.soc.lip6.fr (82-64-3-41.subs.proxad.net [82.64.3.41]) by chassiron.antioche.eu.org (8.15.2/8.15.2) with ESMTPS id 0AK8qs0H019108 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=OK); Fri, 20 Nov 2020 09:52:55 +0100 (MET) Received: by sandettie.soc.lip6.fr (Postfix, from userid 373) id C0BEC2E9CA8; Fri, 20 Nov 2020 09:52:49 +0100 (MET) Date: Fri, 20 Nov 2020 09:52:49 +0100 From: Manuel Bouyer To: Roger Pau =?iso-8859-1?Q?Monn=E9?= Cc: Jan Beulich , xen-devel@lists.xenproject.org Subject: Re: NetBSD dom0 PVH: hardware interrupts stalls Message-ID: <20201120085249.GA1508@antioche.eu.org> References: <20201118100025.ic7r3kfsbdnr6muz@Air-de-Roger> <20201118121403.GC3126@antioche.eu.org> <20201118143928.hvamuf7t7jycsrzb@Air-de-Roger> <20201119141915.igyb7djkw47rf2dt@Air-de-Roger> <20201119155718.GB4104@antioche.eu.org> <20201119165734.GA4903@antioche.eu.org> <20201119175733.GA6067@antioche.eu.org> <1a50e1e2-b69c-afd6-a179-316231512004@suse.com> <20201120082855.5z4cibcd5djlwmgp@Air-de-Roger> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20201120082855.5z4cibcd5djlwmgp@Air-de-Roger> X-Greylist: Sender succeeded STARTTLS authentication, not delayed by milter-greylist-4.4.3 (chassiron.antioche.eu.org [151.127.5.145]); Fri, 20 Nov 2020 09:52:56 +0100 (MET) On Fri, Nov 20, 2020 at 09:28:55AM +0100, Roger Pau Monné wrote: > > i.e. at that point we're waiting for Dom0 to signal it's done handling > > the IRQ. There is, however, a timer associated with this. Yet that's > > actually to prevent the system getting stuck, i.e. the "in-flight" > > state ought to clear 1ms later (when that timer expires), and hence > > ought to be pretty unlikely to catch when non-zero _and_ something's > > actually stuck. > > I somehow assumed the interrupt was in-flight because the printing to > the Xen console caused one to be injected, and thus dom0 didn't had > time to Ack it yet. What does Xen consider to be an ACK from the dom0 ? AFAIK we have EOI only for LAPIC interrupts. -- Manuel Bouyer NetBSD: 26 ans d'experience feront toujours la difference --