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Wed, 18 Nov 2020 11:17:30 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4ca6dc0f-9bce-41f0-b405-73cf42526b4a; Wed, 18 Nov 2020 11:17:29 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 645CFABF4; Wed, 18 Nov 2020 11:17:28 +0000 (UTC) Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kfLSs-0000s1-30 for xen-devel@lists.xenproject.org; Wed, 18 Nov 2020 11:17:30 +0000 X-Inumbo-ID: 4ca6dc0f-9bce-41f0-b405-73cf42526b4a Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4ca6dc0f-9bce-41f0-b405-73cf42526b4a; Wed, 18 Nov 2020 11:17:29 +0000 (UTC) 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=1605698248; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Pt8G61mYEc6hT97jgFFG/f1xH3xLW7U7Vey+5fNVWgk=; b=qXFdRjaLojDipMlmtlLcAkGVxwHCs+TIho5TfzBQXc7fETtnaWuItsIEMpmwXtZhmZ3p+R RtX7WHGWlYSta62Na6gynhLLiQ7PKho0I5l5pqIOKL3dTF+GHd+TtjDqvyvNc0uWnSo5eq GnjkLyoWmoFUl2D4kRhsshsFhoB9wR8= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 645CFABF4; Wed, 18 Nov 2020 11:17:28 +0000 (UTC) Subject: Re: NetBSD dom0 PVH: hardware interrupts stalls To: Manuel Bouyer Cc: xen-devel@lists.xenproject.org, =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= References: <20201117150949.GA3791@antioche.eu.org> <20201117155807.a7jgmftnj6njg6oz@Air-de-Roger> <20201117164033.GB3093@antioche.eu.org> <8039a29c-4058-ab6e-56ef-d1383deb7e38@suse.com> <20201118092819.GE1085@antioche.eu.org> <6ad38151-d218-03c4-8085-9eff35bd63ff@suse.com> <20201118101452.GA1454@antioche.eu.org> From: Jan Beulich Message-ID: Date: Wed, 18 Nov 2020 12:17:29 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.3 MIME-Version: 1.0 In-Reply-To: <20201118101452.GA1454@antioche.eu.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit On 18.11.2020 11:14, Manuel Bouyer wrote: > On Wed, Nov 18, 2020 at 10:43:27AM +0100, Jan Beulich wrote: >> On 18.11.2020 10:28, Manuel Bouyer wrote: >>> On Wed, Nov 18, 2020 at 10:16:17AM +0100, Jan Beulich wrote: >>>> On 17.11.2020 17:40, Manuel Bouyer wrote: >>>>> On Tue, Nov 17, 2020 at 04:58:07PM +0100, Roger Pau Monné wrote: >>>>>> [...] >>>>>> >>>>>> I have attached a patch below that will dump the vIO-APIC info as part >>>>>> of the 'i' debug key output, can you paste the whole output of the 'i' >>>>>> debug key when the system stalls? >>>>> >>>>> see attached file. Note that the kernel did unstall while 'i' output was >>>>> being printed, so it is mixed with some NetBSD kernel output. >>>> >>>> Could you try to run Xen's serial port without use of any IRQ >>>> (i.e. in "polling" mode), in an attempt to avoid this unstalling >>>> (which is likely to render the resulting output at least in part >>>> meaningless)? >>> >>> It there a boot line option for that ? >> >> Yes, com= has a field for this: >> >> ### com1 >> ### com2 >>> `= [/][,[DPS][,[|pci|amt][,[|msi][,[][,[]]]]]]` >> >> with >> >> * `` is the IRQ number to use, or `0` to use the UART in poll >> mode only, or `msi` to set up a Message Signaled Interrupt. > > thanks. > This marginally changes the boot behavior (the kenrel hangs a little bit > earlier) but switching the console input to Xen is enough to get some > interrupt, and hitting 'i' causes again the boot to complete. That's unfortunate for the purposes here, but thanks for trying. Jan