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nvme-pci: Rate limit the nvme timeout warnings

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The block layer's timeout handling currently prevents drivers from
completing commands outside the timeout callback once blk-mq decides
they've expired. If a device breaks, this could potentially create many
thousands of timed out commands. There's nothing of value to be gleaned
from observing each of those messages, so this patch adds a rate limit
on them.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Keith Busch 2018-05-24 14:34:55 -06:00 committed by Christoph Hellwig
parent ab4f47a9f4
commit b9cac43c2c
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/pci.c
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@ -1227,7 +1227,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
switch (dev->ctrl.state) {
case NVME_CTRL_CONNECTING:
case NVME_CTRL_RESETTING:
dev_warn(dev->ctrl.device,
dev_warn_ratelimited(dev->ctrl.device,
"I/O %d QID %d timeout, disable controller\n",
req->tag, nvmeq->qid);
nvme_dev_disable(dev, false);