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| author | Jason Wang <jasowang@redhat.com> | 2017-07-27 11:22:05 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-29 14:15:56 -0700 |
| commit | 8d65843c44269c21e95c98090d9bb4848d473853 (patch) | |
| tree | 2750e3949f94e9c424a97fe8165c50f6c893dcba /drivers/vhost/vhost.h | |
| parent | 90fecc145e49ba0e910173e8b9fe94a458ef3024 (diff) | |
| download | op-kernel-dev-8d65843c44269c21e95c98090d9bb4848d473853.zip op-kernel-dev-8d65843c44269c21e95c98090d9bb4848d473853.tar.gz | |
Revert "vhost: cache used event for better performance"
This reverts commit 809ecb9bca6a9424ccd392d67e368160f8b76c92. Since it
was reported to break vhost_net. We want to cache used event and use
it to check for notification. The assumption was that guest won't move
the event idx back, but this could happen in fact when 16 bit index
wraps around after 64K entries.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/vhost/vhost.h')
| -rw-r--r-- | drivers/vhost/vhost.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index f720958..bb7c29b 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -115,9 +115,6 @@ struct vhost_virtqueue { /* Last index we used. */ u16 last_used_idx; - /* Last used evet we've seen */ - u16 last_used_event; - /* Used flags */ u16 used_flags; |
