From: sagi@grimberg.me (Sagi Grimberg)
Subject: crash when connecting to targets using nr_io_queues < num cpus
Date: Thu, 1 Sep 2016 12:32:46 +0300 [thread overview]
Message-ID: <6082d700-a45c-b00a-3f09-ba6196cc3e5e@grimberg.me> (raw)
In-Reply-To: <011401d203c4$0cdd78c0$26986a40$@opengridcomputing.com>
> Hey all,
>
> I'm testing smaller ioq sets with nvmf/rdma, and I see some issue. If I connect
> with 2, 4, 6, 8, 10, 16, or 32 for nr_io_queues, everything is happy. It
> seems, though, if I connect with a value of 12, or 28, or some other non power
> of two, I get intermittent crashes in __blk_mq_get_reserved_tag() at line 337
> when setting up a controller's IO queues. I'm not sure exactly if this is
> always non power of two, or something else, but it seems to never crash with
> power of two values (could be a coincidence I guess).
I think Ming sent a patch for this some time ago... Not sure what
happened with it though...
next prev parent reply other threads:[~2016-09-01 9:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-31 20:12 crash when connecting to targets using nr_io_queues < num cpus Steve Wise
2016-09-01 9:32 ` Sagi Grimberg [this message]
2016-09-01 14:10 ` Steve Wise
2016-09-01 19:01 ` Steve Wise
2016-09-04 8:46 ` Sagi Grimberg
2016-09-13 14:21 ` Steve Wise
2016-09-13 17:14 ` Ming Lin
2016-09-13 17:52 ` Keith Busch
2016-09-13 19:43 ` Steve Wise
2016-09-16 14:10 ` Steve Wise
2016-09-16 14:26 ` 'Christoph Hellwig'
2016-09-22 21:02 ` 'Christoph Hellwig'
2016-09-22 21:38 ` Steve Wise
2016-09-22 21:48 ` 'Christoph Hellwig'
2016-09-22 22:03 ` Steve Wise
[not found] ` <024201d2151d$28013b90$7803b2b0$@opengridcomputing.com>
2016-09-23 0:01 ` Steve Wise
2016-09-23 3:31 ` 'Christoph Hellwig'
2016-09-23 13:58 ` Steve Wise
2016-09-23 16:21 ` Jens Axboe
2016-09-23 16:23 ` 'Christoph Hellwig'
2016-09-23 16:24 ` Jens Axboe
2016-09-23 16:26 ` Jens Axboe
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