Robert Watson wrote:
(Bcc to arch@)
On Mon, 26 May 2008, Robert Watson wrote:
Just to keep track of things:
http://wiki.freebsd.org/NONMPSAFE_DEORBIT
Delayed by about six months, the merge and switch to the new USB stack
in 8.x means that we're now fairly close to being able to pick up this
project again. The goal remains to eliminate IFF_NEEDSGIANT, which is
(mostly) the last piece of non-MPSAFE compatibility infrastructure in
the network stack in -CURRENT. I removed support for non-MPSAFE network
protocols before 7.0, and this is the support for non-MPSAFE network
device drivers. As of the current moment in HEAD, the following drivers
are flagged wth IFF_NEEDSGIANT:
General network device drivers that still require Giant:
if_ar
if_ray
if_sl
if_sr
if_sr and if_ar are really simple and could probably
be converted "trivially".. especially if
their netgraph code is used.
however I wonder if anyone still has that hardware (they are
drivers for two sync serial cards).
John Hay must have had some when he wrote the driver...
Old USB network device drivers:
if_axe
if_cdce
if_cue
if_kue
if_rue
if_rum
if_udav
if_upgt
if_ural
if_urtw
if_zyd
Network device drivers intimately tangled with the old TTY code:
if_cx
if_ppp
lf_sl
A network device driver that appears to conditionally use IFF_NEEDSGIANT
for the purposes of (sometimes) interacting with the old USB code:
if_ndis
The following schedule is proposed, assuming nothing goes horribly wrong
with the new USB code in the next few weeks, and remaining nits relating
to USB network and 802.11 drivers are handled:
16 February 2009 HEADS UP to lists (this e-mail)
01 March 2009 Disable build of all IFF_NEEDSGIANT drivers in 8.x
01 April 2009 Remove all IFF_NEEDSGIANT drivers from 8.x
In the next couple of weeks, I'd like to resolve the status of (and
eliminate) the if_ndis conditional use of IFF_NEEDSGIANT. There's also
a chance that if_sl will get updated by Ed and myself to work with the
new locking and TTY world orders -- the lock is easy, but the TTY update
takes a bit of work. Perhaps someone will feel moved to do this for
if_ppp and possibly if_cx as well.
Robert N M Watson
Computer Laboratory
University of Cambridge
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