linux-kernel - Re: [PATCH] block-mq:Fix the null memory access while setting tags cpumask

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Date:	Tue, 13 Oct 2015 12:47:00 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Cc:	<axboe@...nel.dk>, <linuxppc-dev@...ts.ozlabs.org>,
	<ming.lei@...onical.com>, <keith.busch@...el.com>,
	<snitzer@...hat.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] block-mq:Fix the null memory access while setting tags cpumask

Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com> writes:

> In nr_hw_queues >1 cases when certain number of cpus are onlined/or
> offlined, that results change in request_queue map in block-mq layer,
> we see the kernel dumping like:

What version is that patch against?  This problem should be fixed by the
patch set from Akinobu Mita.  I tested cpu hot-plugging on my system
with an nvme device, and it is fixed there on mainline.

Cheers,
Jeff
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