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authorMing Lei <ming.lei@redhat.com>2021-01-22 05:33:08 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-03-05 01:36:59 +0300
commitc548e62bcf6adc7066ff201e9ecc88e536dd8890 (patch)
tree526fdd3f62253edc5c9512207fa76655991d7c5c /drivers/vhost/scsi.c
parentbf2c4282a10a92810ba83e85677a5273d6ca0df5 (diff)
downloadlinux-c548e62bcf6adc7066ff201e9ecc88e536dd8890.tar.xz
scsi: sbitmap: Move allocation hint into sbitmap
Allocation hint should have belonged to sbitmap. Also, when sbitmap's depth is high and there is no need to use mulitple wakeup queues, user can benefit from percpu allocation hint too. Move allocation hint into sbitmap, then SCSI device queue can benefit from allocation hint when converting to plain sbitmap. Convert vhost/scsi.c to use sbitmap allocation with percpu alloc hint. This is more efficient than the previous approach. Link: https://lore.kernel.org/r/20210122023317.687987-5-ming.lei@redhat.com Cc: Omar Sandoval <osandov@fb.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Sumanesh Samanta <sumanesh.samanta@broadcom.com> Cc: Ewan D. Milne <emilne@redhat.com> Cc: Mike Christie <michael.christie@oracle.com> Cc: virtualization@lists.linux-foundation.org Tested-by: Sumanesh Samanta <sumanesh.samanta@broadcom.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/vhost/scsi.c')
-rw-r--r--drivers/vhost/scsi.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 3412a3ad28e6..936584250a0b 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -614,7 +614,7 @@ vhost_scsi_get_cmd(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg,
return ERR_PTR(-EIO);
}
- tag = sbitmap_get(&svq->scsi_tags, 0);
+ tag = sbitmap_get(&svq->scsi_tags);
if (tag < 0) {
pr_err("Unable to obtain tag for vhost_scsi_cmd\n");
return ERR_PTR(-ENOMEM);
@@ -1512,7 +1512,7 @@ static int vhost_scsi_setup_vq_cmds(struct vhost_virtqueue *vq, int max_cmds)
return 0;
if (sbitmap_init_node(&svq->scsi_tags, max_cmds, -1, GFP_KERNEL,
- NUMA_NO_NODE, false))
+ NUMA_NO_NODE, false, true))
return -ENOMEM;
svq->max_cmds = max_cmds;