Re: system hung up when offlining CPUs

From	Christoph Hellwig <hch@lst.de>
Newsgroups	linux.kernel
Subject	Re: system hung up when offlining CPUs
Date	2017-08-21 14:10 +0200
Message-ID	<ugTGP-4d6-39@gated-at.bofh.it> (permalink)
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Hi Marc,

in general the driver should know not to use the queue / irq,
as blk-mq will never schedule I/O to queues that have no online
cpus.

The real bugs seems to be that we're using affinity for a device
that only has one real queue (as the config queue should not
have affinity).  Let me dig into what's going on here with virtio.

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Re: system hung up when offlining CPUs Christoph Hellwig <hch@lst.de> - 2017-08-21 14:10 +0200

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