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Add vdev property to disable vdev scheduler

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Added vdev property to disable the vdev scheduler.
The intention behind this property is to improve IOPS
performance when using o_direct.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: MigeljanImeri <ImeriMigel@gmail.com>
Closes #17358
This commit is contained in:
MigeljanImeri
2026-02-23 12:34:33 -05:00
committed by GitHub
parent d2f5cb3a50
commit 4975430cf5
14 changed files with 206 additions and 2 deletions
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module/zfs/vdev_queue.c
+40
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@@ -879,6 +879,38 @@ again:
return (zio);
}
static boolean_t
vdev_should_queue_io(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
boolean_t should_queue = B_TRUE;
/*
* Add zio with ZIO_FLAG_NODATA to queue as bypass code
* currently does not handle certain cases (gang abd, raidz
* write aggregation).
*/
if (zio->io_flags & ZIO_FLAG_NODATA)
return (B_TRUE);
switch (vd->vdev_scheduler) {
case VDEV_SCHEDULER_AUTO:
if (vd->vdev_nonrot && vd->vdev_is_blkdev)
should_queue = B_FALSE;
break;
case VDEV_SCHEDULER_ON:
should_queue = B_TRUE;
break;
case VDEV_SCHEDULER_OFF:
should_queue = B_FALSE;
break;
default:
should_queue = B_TRUE;
break;
}
return (should_queue);
}
zio_t *
vdev_queue_io(zio_t *zio)
{
@@ -922,6 +954,11 @@ vdev_queue_io(zio_t *zio)
zio->io_flags |= ZIO_FLAG_DONT_QUEUE;
zio->io_timestamp = gethrtime();
if (!vdev_should_queue_io(zio)) {
zio->io_queue_state = ZIO_QS_NONE;
return (zio);
}
mutex_enter(&vq->vq_lock);
vdev_queue_io_add(vq, zio);
nio = vdev_queue_io_to_issue(vq);
@@ -954,6 +991,9 @@ vdev_queue_io_done(zio_t *zio)
vq->vq_io_complete_ts = now;
vq->vq_io_delta_ts = zio->io_delta = now - zio->io_timestamp;
if (zio->io_queue_state == ZIO_QS_NONE)
return;
mutex_enter(&vq->vq_lock);
vdev_queue_pending_remove(vq, zio);