[ovs-dev] [PATCH] ovs-vswitchd: Update limits section in manpage.

Numan Siddique nusiddiq at redhat.com
Fri May 10 09:03:29 UTC 2019


On Wed, May 1, 2019 at 5:23 AM Ben Pfaff <blp at ovn.org> wrote:

> Reported-by: William Konitzer <wkonitzer at mirantis.com>
> Signed-off-by: Ben Pfaff <blp at ovn.org>
>

Acked-by: Numan Siddique <nusiddiq at redhat.com>


> ---
>  vswitchd/ovs-vswitchd.8.in | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/vswitchd/ovs-vswitchd.8.in b/vswitchd/ovs-vswitchd.8.in
> index 901f75e6f300..fcf22244a60f 100644
> --- a/vswitchd/ovs-vswitchd.8.in
> +++ b/vswitchd/ovs-vswitchd.8.in
> @@ -319,13 +319,12 @@ limits assume the use of the Linux kernel datapath.
>  \fBovs\-vswitchd\fR started through \fBovs\-ctl\fR(8) provides a limit of
> 65535
>  file descriptors.  The limits on the number of bridges and ports is
> decided by
>  the availability of file descriptors.  With the Linux kernel datapath,
> creation
> -of a single bridge consumes three file descriptors and adding a port
> consumes
> -"n-handler-threads" file descriptors per bridge port.  Performance will
> degrade
> -beyond 1,024 ports per bridge due to fixed hash table sizing.  Other
> platforms
> +of a single bridge consumes three file descriptors and each port
> +consumes one additional file descriptor.  Other platforms
>  may have different limitations.
>  .
>  .IP \(bu
> -2,048 MAC learning entries per bridge, by default.  (This is
> +8,192 MAC learning entries per bridge, by default.  (This is
>  configurable via \fBother\-config:mac\-table\-size\fR in the
>  \fBBridge\fR table.  See \fBovs\-vswitchd.conf.db\fR(5) for details.)
>  .
> @@ -351,7 +350,10 @@ time linear in the number of flows.
>  32 mirrors per bridge.
>  .
>  .IP \(bu
> -15 bytes for the name of a port.  (This is a Linux kernel limitation.)
> +15 bytes for the name of a port, for ports implemented in the Linux
> +kernel.  Ports implemented in userspace, such as patch ports, do not
> +have an arbitrary length limitation.  OpenFlow also limit port names
> +to 15 bytes.
>  .
>  .SH "SEE ALSO"
>  .BR ovs\-appctl (8),
> --
> 2.20.1
>
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