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Clean up from the old kern.polling.

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Reviewed by:	attilio
MFC after:	1 week
This commit is contained in:
pluknet 2012-03-23 10:33:24 +00:00
parent 2ecce29547
commit 4e698dcf9e
1 changed files with 10 additions and 48 deletions
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58
share/man/man9/ifnet.9
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@ -798,20 +798,7 @@ The capability of a network interface to operate in
.Xr polling 4
mode involves several flags in different
global variables and per-interface fields.
First, there is a system-wide
.Xr sysctl 8
master switch named
.Va kern.polling.enable ,
which can toggle
.Xr polling 4
globally.
If that variable is set to non-zero,
.Xr polling 4
will be used on those devices where it is enabled individually.
Otherwise,
.Xr polling 4
will not be used in the system.
Second, the capability flag
The capability flag
.Dv IFCAP_POLLING
set in interface's
.Va if_capabilities
@ -821,20 +808,19 @@ on the particular interface.
If set in
.Va if_capabilities ,
the same flag can be marked or cleared in the interface's
.Va if_capenable ,
.Va if_capenable
within
.Fn ifioctl ,
thus initiating switch of the interface to
.Xr polling 4
mode or interrupt
mode, respectively.
The actual mode change will occur at an implementation-specific moment
in the future, e.g., during the next interrupt or
.Xr polling 4
cycle.
And finally, if the mode transition has been successful, the flag
.Dv IFF_POLLING
is marked or cleared in the interface's
.Va if_flags
to indicate the current mode of the interface.
The actual mode change is managed by the driver-specific
.Fn if_ioctl
routine.
The
.Xr polling
handler returns the number of packets processed.
.Ss The Vt if_data Ss Structure
The
.Vt if_data
@ -880,18 +866,6 @@ to attempt to ensure that there is always
sufficient space to prepend a link-layer header without allocating an
additional
.Vt mbuf .
.\" (See
.\" .Xr mbuf 9 . )
.\" .It Va ifi_recvquota
.\" .Pq Vt u_char
.\" Number of packets the interface is permitted to receive at one time
.\" when in polled mode.
.\" .It Va ifi_xmitquota
.\" .Pq Vt u_char
.\" Number of packets the interface is permitted to queue for transmission
.\" at one time when in polled mode.
.\" There is some controversy over
.\" whether such a restriction makes any sense at all.
.It Va ifi_datalen
.Pq Vt u_char
Length of the
@ -972,18 +946,6 @@ Number of packets dropped on input.
Rarely implemented.
.It Va ifi_noproto
Number of packets received for unknown network-layer protocol.
.\" .It Va ifi_recvtiming
.\" Amount of time, in microseconds, spent to receive an average packet on
.\" this interface.
.\" See the
.\" .Sx Polling
.\" section, below.
.\" .It Va ifi_xmittiming
.\" Amount of time, in microseconds, spent to service a transmit-complete
.\" interrupt on this interface.
.\" See the
.\" .Sx Polling
.\" section, below.
.It Va ifi_lastchange
.Pq Vt "struct timeval"
The time of the last administrative change to the interface (as required