Messages in this thread Patch in this message | | | From | Jens Axboe <> | Subject | [PATCH 5/7] blk-mq: add BLK_MQ_F_NO_SCHED flag | Date | Mon, 5 Dec 2016 11:27:04 -0700 |
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Drivers can use this to prevent IO scheduling on a queue. Use this for NVMe, for the admin queue, which doesn't handle file system requests.
Signed-off-by: Jens Axboe <axboe@fb.com> --- drivers/nvme/host/pci.c | 1 + include/linux/blk-mq.h | 1 + 2 files changed, 2 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index d58f8e4e2c06..4560575f0a39 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1187,6 +1187,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev) dev->admin_tagset.timeout = ADMIN_TIMEOUT; dev->admin_tagset.numa_node = dev_to_node(dev->dev); dev->admin_tagset.cmd_size = nvme_cmd_size(dev); + dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED; dev->admin_tagset.driver_data = dev; if (blk_mq_alloc_tag_set(&dev->admin_tagset)) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 35a0af5ede6d..a85bd83bb218 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -151,6 +151,7 @@ enum { BLK_MQ_F_SG_MERGE = 1 << 2, BLK_MQ_F_DEFER_ISSUE = 1 << 4, BLK_MQ_F_BLOCKING = 1 << 5, + BLK_MQ_F_NO_SCHED = 1 << 6, BLK_MQ_F_ALLOC_POLICY_START_BIT = 8, BLK_MQ_F_ALLOC_POLICY_BITS = 1, -- 2.7.4
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