devd later in the boot process. This should fix all the problems
people have had with those commits. Diskless should be working again,
and those that mount /usr with nfs should be able to do that again too.
critical remote systems. This lets us run commands from devd that
aren't on the / partition. This also means we can remove some kludges
from the networking startup that I added a while ago that caused other
problems.
There's still a race in starting devd that needs to be fixed in devd
so that things present at boot will be configured by the time devd
does daemon(). That race will be fixed later.
device node exists directly to see if OLDCARD is compiled into the
kernel. This eliminates the scary warning that people using NEWCARD
are seeing when they have pccard_enable=YES in their /etc/rc.conf
files.
disk I/O processing.
The intent is that the disk driver in its hardware interrupt
routine will simply schedule the bio on the task queue with
a routine to finish off whatever needs done.
The g_up thread will then schedule this routine, the likely
outcome of which is a biodone() which queues the bio on
g_up's regular queue where it will be picked up and processed.
Compared to the using the regular taskqueue, this saves one
contextswitch.
Change our scheduling of the g_up and g_down queues to be water-tight,
at the cost of breaking the userland regression test-shims.
Input and ideas from: scottl
Cut up requests into smaller bits if they are longer than the drivers
disk->d_maxsize or dev->si_iosize_max.
Properly handle the race condition when using g_clone_bio() is used
without having the single-threadedness of g_down/g_up secure locking.
More work likely needs to happen. This describes things better than
the old "this man page intentionally left blank" style man page that
I'd committed previously.
Nitpickers: comb nits and commit!
and d_stripesisze;
Introduce si_stripesize and si_stripeoffset in struct cdev so we
can make the visible to clustering code.
Add stripesize and stripeoffset to providers.
DTRT with stripesize and stripeoffset in various places in GEOM.
