From: keith.busch@linux.intel.com (Keith Busch)
Subject: [PATCH 5/7] nvme-pci: handle completions outside of the queue lock
Date: Fri, 18 May 2018 15:06:31 -0600 [thread overview]
Message-ID: <20180518210630.GD27795@localhost.localdomain> (raw)
In-Reply-To: <1526655155-4006-6-git-send-email-axboe@kernel.dk>
On Fri, May 18, 2018@08:52:33AM -0600, Jens Axboe wrote:
> Note that this kills the ->cqe_seen as well. I haven't been able to
> trigger any ill effects of this. If we do race with polling every so
> often, it should be rare enough NOT to trigger any issues.
Ah hell, running HIPRI tests on low latency devices is hitting spruious
interrupt detection:
[ 560.169153] irq 630: nobody cared (try booting with the "irqpoll" option)
[ 560.175988] CPU: 40 PID: 0 Comm: swapper/40 Not tainted 4.17.0-rc2+ #65
[ 560.175990] Hardware name: Intel Corporation S2600STB/S2600STB, BIOS SE5C620.86B.00.01.0010.010920180151 01/09/2018
[ 560.175991] Call Trace:
[ 560.175994] <IRQ>
[ 560.176005] dump_stack+0x5c/0x7b
[ 560.176010] __report_bad_irq+0x30/0xc0
[ 560.176013] note_interrupt+0x235/0x280
[ 560.176020] handle_irq_event_percpu+0x51/0x70
[ 560.176023] handle_irq_event+0x27/0x50
[ 560.176026] handle_edge_irq+0x6d/0x180
[ 560.176031] handle_irq+0xa5/0x110
[ 560.176036] do_IRQ+0x41/0xc0
[ 560.176042] common_interrupt+0xf/0xf
[ 560.176043] </IRQ>
[ 560.176050] RIP: 0010:cpuidle_enter_state+0x9b/0x2b0
[ 560.176052] RSP: 0018:ffffa0ed4659fe98 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdd
[ 560.176055] RAX: ffff9527beb20a80 RBX: 000000826caee491 RCX: 000000000000001f
[ 560.176056] RDX: 000000826caee491 RSI: 00000000335206ee RDI: 0000000000000000
[ 560.176057] RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000008
[ 560.176059] R10: ffffa0ed4659fe78 R11: 0000000000000001 R12: ffff9527beb29358
[ 560.176060] R13: ffffffffa235d4b8 R14: 0000000000000000 R15: 000000826caed593
[ 560.176065] ? cpuidle_enter_state+0x8b/0x2b0
[ 560.176071] do_idle+0x1f4/0x260
[ 560.176075] cpu_startup_entry+0x6f/0x80
[ 560.176080] start_secondary+0x184/0x1d0
[ 560.176085] secondary_startup_64+0xa5/0xb0
[ 560.176088] handlers:
[ 560.178387] [<00000000efb612be>] nvme_irq [nvme]
[ 560.183019] Disabling IRQ #630
next prev parent reply other threads:[~2018-05-18 21:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-18 14:52 [PATCHSET v2 0/7] Improve nvme completion handling Jens Axboe
2018-05-18 14:52 ` [PATCH 1/7] nvme: mark the result argument to nvme_complete_async_event volatile Jens Axboe
2018-05-18 14:52 ` [PATCH 2/7] nvme-pci: simplify nvme_cqe_valid Jens Axboe
2018-05-18 20:49 ` Keith Busch
2018-05-18 20:48 ` Jens Axboe
2018-05-18 14:52 ` [PATCH 3/7] nvme-pci: remove cq check after submission Jens Axboe
2018-05-18 14:52 ` [PATCH 4/7] nvme-pci: move ->cq_vector == -1 check outside of ->q_lock Jens Axboe
2018-05-18 14:52 ` [PATCH 5/7] nvme-pci: handle completions outside of the queue lock Jens Axboe
2018-05-18 21:06 ` Keith Busch [this message]
2018-05-18 21:11 ` Jens Axboe
2018-05-18 21:22 ` Jens Axboe
2018-05-18 21:28 ` Keith Busch
2018-05-18 21:31 ` Jens Axboe
2018-05-18 21:48 ` Keith Busch
2018-05-18 22:46 ` Jens Axboe
2018-05-21 14:18 ` Jens Axboe
2018-05-21 14:23 ` Keith Busch
2018-05-21 14:33 ` Jens Axboe
2018-05-21 14:40 ` Keith Busch
2018-05-21 14:43 ` Keith Busch
2018-05-18 21:25 ` Keith Busch
2018-05-18 14:52 ` [PATCH 6/7] nvme-pci: split the nvme queue lock into submission and completion locks Jens Axboe
2018-05-18 14:52 ` [PATCH 7/7] nvme-pci: drop IRQ disabling on submission queue lock Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2018-05-17 16:31 RFC: handle completions outside the queue lock and split the " Christoph Hellwig
2018-05-17 16:31 ` [PATCH 5/7] nvme-pci: handle completions outside of " Christoph Hellwig
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