K 10
svn:author
V 5
luigi
K 8
svn:date
V 27
2002-02-09T23:02:40.000000Z
K 7
svn:log
V 1660
MFC: device polling code for RELENG_4.

Most of the code resides in kern_poll.c, plus device driver
modifications to individual drivers to add the *_poll() handler,
plus mostly one-line changes to a bunch of other files (listed at
the end of this message) to define constants or call the appropriate
functions.

A device_poll(4) manpage is still missing. It should contain an
explaination of what DEVICE_POLLING does, which you can find at

	http://info.iet.unipi.it/~luigi/polling/

To use this facility: add

	options DEVICE_POLLING

to your kernel config file, and at runtime do

	sysctl kern.polling.enable=1

At the moment only the "dc", "fxp" and "sis" drivers have been
modified to make use of this feature. More drivers will be modified
as i have a chance to test them (patches welcome, look at the changes
in the above drivers).

Work supported by: the Xorp Project (www.xorp.org)

sys/kern/kern_poll.c
	the core of the polling procedures
sys/conf/files.i386
	kern/kern_poll.c               optional        device_polling
sys/conf/options.i386
	DEVICE_POLLING		opt_global.h
sys/i386/i386/swtch.s
	hook to poll in the idle loop
sys/i386/i386/trap.c
	hook to poll in traps
sys/i386/include/asnames.h
	#define _idle_poll 			idle_poll
sys/kern/kern_clock.c
	calls to init and periodic poll handlers
sys/net/if.h
	#define	IFF_POLLING	0x10000
sys/net/if_var.h
	prototypes for functions used in device drivers
sys/net/netisr.h
	NETISR_POLL and NETISR_POLLMORE, renumber NETISR_NETGRAPH
	(not objected by julian)
sys/dev/fxp/if_fxp.c
sys/dev/fxp/if_fxpvar.h
sys/pci/if_dc.c
sys/pci/if_dcreg.h
sys/pci/if_sis.c
sys/pci/if_sisreg.h
	device driver modifications

END