Displaying 5 results from an estimated 5 matches for "reserved_tag".
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reserved_tags
2020 Mar 10
2
[PATCH RFC v2 01/24] scsi: add 'nr_reserved_cmds' field to the SCSI host template
...csi_lib.c
> @@ -1896,6 +1896,7 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost)
> shost->tag_set.ops = &scsi_mq_ops_no_commit;
> shost->tag_set.nr_hw_queues = shost->nr_hw_queues ? : 1;
> shost->tag_set.queue_depth = shost->can_queue;
> + shost->tag_set.reserved_tags = shost->nr_reserved_cmds;
You reserve tags for special usage, meantime the whole queue depth
isn't increased, that means the tags for IO request is decreased given
reserved tags can't be used for IO, so IO performance may be effected.
If not the case, please explain a bit in commit l...
2020 Mar 10
2
[PATCH RFC v2 01/24] scsi: add 'nr_reserved_cmds' field to the SCSI host template
...csi_lib.c
> @@ -1896,6 +1896,7 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost)
> shost->tag_set.ops = &scsi_mq_ops_no_commit;
> shost->tag_set.nr_hw_queues = shost->nr_hw_queues ? : 1;
> shost->tag_set.queue_depth = shost->can_queue;
> + shost->tag_set.reserved_tags = shost->nr_reserved_cmds;
You reserve tags for special usage, meantime the whole queue depth
isn't increased, that means the tags for IO request is decreased given
reserved tags can't be used for IO, so IO performance may be effected.
If not the case, please explain a bit in commit l...
2020 Mar 11
0
[PATCH RFC v2 01/24] scsi: add 'nr_reserved_cmds' field to the SCSI host template
...@ -1896,6 +1896,7 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost)
>> shost->tag_set.ops = &scsi_mq_ops_no_commit;
>> shost->tag_set.nr_hw_queues = shost->nr_hw_queues ? : 1;
>> shost->tag_set.queue_depth = shost->can_queue;
>> + shost->tag_set.reserved_tags = shost->nr_reserved_cmds;
>
> You reserve tags for special usage, meantime the whole queue depth
> isn't increased, that means the tags for IO request is decreased given
> reserved tags can't be used for IO, so IO performance may be effected.
>
> If not the case, pl...
2015 Sep 10
6
[RFC PATCH 0/2] virtio nvme
Hi all,
These 2 patches added virtio-nvme to kernel and qemu,
basically modified from virtio-blk and nvme code.
As title said, request for your comments.
Play it in Qemu with:
-drive file=disk.img,format=raw,if=none,id=D22 \
-device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4
The goal is to have a full NVMe stack from VM guest(virtio-nvme)
to host(vhost_nvme) to LIO NVMe-over-fabrics
2015 Sep 10
6
[RFC PATCH 0/2] virtio nvme
Hi all,
These 2 patches added virtio-nvme to kernel and qemu,
basically modified from virtio-blk and nvme code.
As title said, request for your comments.
Play it in Qemu with:
-drive file=disk.img,format=raw,if=none,id=D22 \
-device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4
The goal is to have a full NVMe stack from VM guest(virtio-nvme)
to host(vhost_nvme) to LIO NVMe-over-fabrics