vnode is from a file system that is not MPSAFE, as vrele() expects
Giant to be held when it is called on a non-MPSAFE vnode.
Spotted by: kris
Tested by: glebius
to sbus_mdvec.dv_clock as sbus_mdvec.dv_clock is meant to be specified
in MHz. While this was a bug it shouldn't have affected FreeBSD/sparc64
as sbus_mdvec.dv_clock is used to limit the clock rate of chips when
a machine isn't able to support them at maximum speed which isn't the
case for sun4u machines.
- Remove the code that checks whether the clock frequency returned by
sbus_get_clockfreq() is 0 and falls back to 25MHz if it is as that's
already done in sbus(4).
Approved by: mjacob
MFC after: 3 days
store some pipe pointers on stack. If user reconfigures dummynet
in the interlock gap, we can work with freed pipes after relock.
To fix this, we decided not to send packets in transmit_event(),
but fill a queue. At the end of dummynet() and dummynet_io(),
after the lock is dropped, if there is something in the queue
we run dummynet_send() to process the queue.
In collaboration with: ru
dedicated to storing pv entries, originally so that kva didn't have to be
allocated at inconvenient times. For amd64, we can get the same effect by
using the direct map area. Allocating pages is the same as with the object
backed method, but now we can just lookup the page in the direct map area.
Thus, no more pageable kva is reserved. This is the single largest
consumer of kva on our work machines and this change should help conserve
the fixed size 2GB pageable kva on the amd64 kernel.
There are a pair of sysctl nodes introduced, named the same as their
tunable counterparts. vm.pmap.shpgperproc and vm.pmap.pv_entry_max
They work just like the tunables of the same path, except the values are
linked. The pv entry cap is now dynamically changeable.
I didn't make them totally unlimited because we need some sort of safety
limit still. One could consume all physical memory without a cap.
the system when brelse() was called with B_RELBUF set on the buffer. This
could be a problem when the system was low on memory, had many buffers on
QUEUE_EMPTYKVA and started to traverse directories. For each getnewbuf(),
pages were allocated from the system, driving the free reserve downwards.
For each brelse(), the system put the buffer on QUEUE_CLEAN, with B_INVAL
set.
This commit changes the semantics of B_RELBUF to also free pages from
non-VMIO buffers.
Reviewed by: alc
routines.
- Add or replace cpu_spinwait() with DELAY(1) to a few of the busy
loops when reading from the controller to work around firmware bugs
which can crash the controller.
was thinking from the pcn(4) perspective instead of the le(4) one when
writing the former version as le(4) supports a superset of the chips
supported by pcn(4) and not the other way round.
kernel audit facility, warnings about the experimental nature of this
implementation, and pointers at a large number of other audit related
man pages.
Obtained from: TrustedBSD Project
with pseudo header for tcp/udp packets). This could save one in_pseudo() call
per incoming tcp/udp packet.
Approved by: glebius (mentor)
MFC after: 3 weeks
