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| author | Eugenio Pérez <eperezma@redhat.com> | 2022-08-23 20:30:28 +0200 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2022-09-02 10:22:39 +0800 |
| commit | 9e193cec5db949e4001070442a2f7de7042ef09b (patch) | |
| tree | 9a4f332af4f4c7c26facb66554f99377703f5399 /hw | |
| parent | 86f5f2546f03a3dfde421c715187b262e29b2848 (diff) | |
| download | qemu-9e193cec5db949e4001070442a2f7de7042ef09b.zip qemu-9e193cec5db949e4001070442a2f7de7042ef09b.tar.gz qemu-9e193cec5db949e4001070442a2f7de7042ef09b.tar.bz2 | |
vhost: Delete useless read memory barrier
As discussed in previous series [1], this memory barrier is useless with
the atomic read of used idx at vhost_svq_more_used. Deleting it.
[1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02616.html
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio/vhost-shadow-virtqueue.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index b35aeef..8df5296 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -509,9 +509,6 @@ size_t vhost_svq_poll(VhostShadowVirtqueue *svq) if (unlikely(g_get_monotonic_time() - start_us > 10e6)) { return 0; } - - /* Make sure we read new used_idx */ - smp_rmb(); } while (true); } |