diff options
Diffstat (limited to 'usr/src/cmd/bhyve/virtio.c')
| -rw-r--r-- | usr/src/cmd/bhyve/virtio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/usr/src/cmd/bhyve/virtio.c b/usr/src/cmd/bhyve/virtio.c index 47a3ed29ba..2d78b016c6 100644 --- a/usr/src/cmd/bhyve/virtio.c +++ b/usr/src/cmd/bhyve/virtio.c @@ -428,7 +428,8 @@ vq_relchain(struct vqueue_info *vq, uint16_t idx, uint32_t iolen) /* * Ensure the used descriptor is visible before updating the index. - * This is necessary on ISAs with memory ordering less strict than x86. + * This is necessary on ISAs with memory ordering less strict than x86 + * (and even on x86 to act as a compiler barrier). */ atomic_thread_fence_rel(); vuh->vu_idx = uidx; |