From: Christoph Hellwig <hch@lst.de>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: YASUAKI ISHIMATSU <yasu.isimatu@gmail.com>,
tglx@linutronix.de, axboe@kernel.dk, mpe@ellerman.id.au,
keith.busch@intel.com, peterz@infradead.org,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: system hung up when offlining CPUs
Date: Mon, 21 Aug 2017 14:07:37 +0200 [thread overview]
Message-ID: <20170821120737.GA11622@lst.de> (raw)
In-Reply-To: <c1c7e0d6-d908-b511-8418-bca288a0d20a@arm.com>
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.
next prev parent reply other threads:[~2017-08-21 12:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-08 19:25 system hung up when offlining CPUs YASUAKI ISHIMATSU
2017-08-09 11:42 ` Marc Zyngier
2017-08-09 19:09 ` YASUAKI ISHIMATSU
2017-08-10 11:54 ` Marc Zyngier
2017-08-21 12:07 ` Christoph Hellwig [this message]
2017-08-21 13:18 ` Christoph Hellwig
2017-08-21 13:37 ` Marc Zyngier
2017-09-07 20:23 ` YASUAKI ISHIMATSU
2017-09-12 18:15 ` YASUAKI ISHIMATSU
2017-09-13 11:13 ` Hannes Reinecke
2017-09-13 11:35 ` Kashyap Desai
2017-09-13 13:33 ` Thomas Gleixner
2017-09-14 16:28 ` YASUAKI ISHIMATSU
2017-09-16 10:15 ` Thomas Gleixner
2017-09-16 15:02 ` Thomas Gleixner
2017-10-02 16:36 ` YASUAKI ISHIMATSU
2017-10-03 21:44 ` Thomas Gleixner
2017-10-04 21:04 ` Thomas Gleixner
2017-10-09 11:35 ` [tip:irq/urgent] genirq/cpuhotplug: Add sanity check for effective affinity mask tip-bot for Thomas Gleixner
2017-10-09 11:35 ` [tip:irq/urgent] genirq/cpuhotplug: Enforce affinity setting on startup of managed irqs tip-bot for Thomas Gleixner
2017-10-10 16:30 ` system hung up when offlining CPUs YASUAKI ISHIMATSU
2017-10-16 18:59 ` YASUAKI ISHIMATSU
2017-10-16 20:27 ` Thomas Gleixner
2017-10-30 9:08 ` Shivasharan Srikanteshwara
2017-11-01 0:47 ` Thomas Gleixner
2017-11-01 11:01 ` Hannes Reinecke
2017-10-04 21:10 ` Thomas Gleixner
-- strict thread matches above, loose matches on Subject: below --
2017-08-08 19:24 YASUAKI ISHIMATSU
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