has VXLOCK set - it's already being vgoned, most likely by one of our
callers. If we call vgone, we can end up sleeping against ourself
with VXLOCK set - we'll start the race for root.
Pointed out by Love <lha@stacken.kth.se> on tech-kern. Analysis from
Artur Grabowski <art@openbsd.org> via Love.
Should resolve PR kern/13077
not present" don't print any message but still return ENODEV.
Use this in cd driver to allow open of character raw partition even if
the drive is empty (older drives fails at LOAD_UNLOAD time, newer
ones fail at TEST_UNIT_READY time).
.Xr ct 4
^- This does not work, as "ct" is some *roff command. Work around
it by adding a non-printing char:
.Xr c\&t 4
(for all manpages, just in case and out of laziness)
- Use pools for pmap structures and pv_entry structures.
- Remove a bunch of splvm()/splx(), no longer needed now that
pmap_kenter_pa() and pmap_kremove() are as they should be.
Mostly from Chuck Silvers.
Note that I've some ideas in the works on how to improve the pv handling, so the slow down is short term only.
Also added non-advertising licence and copyright to myself and richard.
is supposed to point directly to struct mbuf or struct sockaddr in kernel
space as appropriate, rather than being a pointer to memory in userland.
This is to be used by compat/* when emulation needs to wrap
send{to|msg}(2)/recv{from|msg}(2) and modify the passed struct
sockaddr.
Previous revision mistakely removed fix for DIAGNOSTIC "getblk: block size
invariant failed" panic, incorporated in rev. 1.5. The problem there
has been that depending on 'off', the code did bread() of 512 and after that
1024 bytes for same 'blkno'. Fix this differently than in rev. 1.5 -
if 'off' would bump the read over to next device block, trim the read to
end on block boundary and read rest in next loop iteration. This seems
to fix the problem, and avoids the performance hit rev. 1.5 incurred.
Fix bug in code handling holes for reads via read(2) - a variable
was incremented instead of decremented.
thorpej