From: hch@infradead.org (Christoph Hellwig)
Subject: [PATCH 1/2] nvme-pci: add module param for io queue number
Date: Fri, 4 Jan 2019 10:09:58 -0800 [thread overview]
Message-ID: <20190104180958.GB4642@infradead.org> (raw)
In-Reply-To: <19ee67dd-c805-f174-94af-bca3aa498677@oracle.com>
On Mon, Dec 24, 2018@09:10:41AM +0800, Shan Hai wrote:
> The problem occurs when offlining CPUs aggressively on a system with large
> number of cores,
>
> for instance offlining 368? out of 384 total cores, the failure of hotplug
> is caused by device irq migration
>
> on cpu hotplugging, the situation becomes worse when there are multiple NVME
> devices are available
NVMe uses managed interrupts, which should never be migrated. What
exact kernel version do you see this on?
next prev parent reply other threads:[~2019-01-04 18:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-21 6:04 [PATCH 1/2] nvme-pci: add module param for io queue number Shan Hai
2018-12-21 6:04 ` [PATCH 2/2] nvme-pci: take the io_queue_number into account when setting number of io queues Shan Hai
2018-12-21 15:02 ` [PATCH 1/2] nvme-pci: add module param for io queue number Bart Van Assche
2018-12-24 1:10 ` Shan Hai
2019-01-04 18:09 ` Christoph Hellwig [this message]
2019-01-05 0:18 ` Shan Hai
2018-12-23 0:38 ` Ming Lei
2018-12-24 1:02 ` Shan Hai
2018-12-24 1:47 ` Ming Lei
2018-12-24 2:12 ` Shan Hai
2018-12-24 2:46 ` Ming Lei
2018-12-24 3:05 ` Shan Hai
2018-12-26 10:23 ` Ming Lei
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