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| author | Jason Wang <jasowang@redhat.com> | 2016-07-06 09:57:55 +0800 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2016-07-07 14:29:04 +0800 |
| commit | 69e87b32680a41d9761191443587c595b6f5fc3f (patch) | |
| tree | 683f9339d73eb1f1480672c2586e46deddbeab7e /qemu-options.hx | |
| parent | 91d35509903464c7f4b9ed56be223d7370d3597c (diff) | |
| download | qemu-69e87b32680a41d9761191443587c595b6f5fc3f.tar.gz | |
tap: vhost busy polling support
This patch add the capability of basic vhost net busy polling which is
supported by recent kernel. User could configure the maximum number of
us that could be spent on busy polling through a new property of tap
"poll-us".
Cc: Greg Kurz <groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 9692e53af6..8e0d9a51bf 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1581,6 +1581,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, "-netdev tap,id=str[,fd=h][,fds=x:y:...:z][,ifname=name][,script=file][,downscript=dfile]\n" " [,helper=helper][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off]\n" " [,vhostfd=h][,vhostfds=x:y:...:z][,vhostforce=on|off][,queues=n]\n" + " [,poll-us=n]\n" " configure a host TAP network backend with ID 'str'\n" " use network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n" " to configure it and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n" @@ -1600,6 +1601,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " use 'vhostfd=h' to connect to an already opened vhost net device\n" " use 'vhostfds=x:y:...:z to connect to multiple already opened vhost net devices\n" " use 'queues=n' to specify the number of queues to be created for multiqueue TAP\n" + " use 'poll-us=n' to speciy the maximum number of microseconds that could be\n" + " spent on busy polling for vhost net\n" "-netdev bridge,id=str[,br=bridge][,helper=helper]\n" " configure a host TAP network backend with ID 'str' that is\n" " connected to a bridge (default=" DEFAULT_BRIDGE_INTERFACE ")\n" |