Christian Zander wrote:
Hi all,
# Task: implement mechanism to allow character drivers to
maintain per-open instance data (e.g. like the Linux
kernel's 'struct file *').
Motivation: allows per thread NVIDIA notification delivery; also
reduces CPU overhead for notification delivery
from the NVIDIA kernel module to the X driver and to
OpenGL.
Priority: should translate to improved X/OpenGL performance.
Status: has not been started.
I've stumbled across this issue a while ago. Actually it can
be partially solved using EVENTHANDLER_REGISTER of dev_clone event with
keeping state structure in si_drv1 or si_drv2 fields. I'm not sure it's
the best solution but it works for me though it smells like hack, and
looks like hack :) Anyway, having legitimate per-open instance data
structures of cdevs is a great assistance in porting linux drivers to
FreeBSD. Just my $0.02.
--
Sincerely,
Oleksandr Tymoshenko
PBXpress Communications, Inc.
http://www.pbxpress.com
Tel./Fax.: +1 866 SIP PBX1 Ext. 656
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