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Date: Thu, 23 Nov 2017 19:32:32 +0100
From: Christoph Hellwig <hch@lst.de>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	Bart Van Assche <Bart.VanAssche@wdc.com>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: 4.14: WARNING: CPU: 4 PID: 2895 at block/blk-mq.c:1144 with
	virtio-blk (also 4.12 stable)
Message-ID: <20171123183232.GA2845@lst.de>
References: <276625a9-44fb-719d-9281-caacefdbb99f@de.ibm.com> <eceae481-cf9a-0429-7a15-c363a8e7bc2a@kernel.dk> <1ddd1cd4-2862-849e-7849-82544bcb86be@de.ibm.com> <08e6f35a-4f49-973e-99f7-6087b44337c4@kernel.dk> <20171122072857.GA19338@lst.de> <a1d51b13-c034-e0c8-9428-e360b2c898c3@kernel.dk> <20171123143453.GA29715@lst.de> <cdca47a9-05cc-2676-57fe-904ce8ad5fbc@de.ibm.com> <20171123182542.GA2680@lst.de> <899f1638-cca4-28e6-3225-51505a053d45@de.ibm.com>
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On Thu, Nov 23, 2017 at 07:28:31PM +0100, Christian Borntraeger wrote:
> zfcp on s390.

Ok, so it can't be the interrupt code, but probably is the blk-mq-cpumap.c
changes.  Can you try to revert just those for a quick test?