to use a locked cmpexg when unlocking a lock that we already hold, since
nobody else can touch the lock while we hold it. Second, it is not
necessary to use a locked cmpexg when locking a lock that we already
hold, for the same reason. These changes will allow MP locks to be used
recursively without impacting performance.
Modify two procedures that are called only by assembly and are already
NOPROF entries to pass a critical argument in %edx instead of on the
stack, removing a significant amount of code from the critical path
as a consequence.
Reviewed by: Alfred Perlstein <bright@wintelcom.net>, Peter Wemm <peter@netplex.com.au>
linked list to store the callbak routines. The patch converts the
lists to queue(3) TAILQs, making the code slightly clearer and ensuring
that callbacks are executed in FIFO order.
Man page also updated as necesary.
(discontinued use of M_TEMP malloc type while here anyway /phk)
Submitted by: Jake Burkholder jake@checker.org
PR: 14912
to use a locked cmpexg when unlocking a lock that we already hold, since
nobody else can touch the lock while we hold it. Second, it is not
necessary to use a locked cmpexg when locking a lock that we already
hold, for the same reason. These changes will allow MP locks to be used
recursively without impacting performance.
Modify two procedures that are called only by assembly and are already
NOPROF entries to pass a critical argument in %edx instead of on the
stack, removing a significant amount of code from the critical path
as a consequence.
Reviewed by: Alfred Perlstein <bright@wintelcom.net>, Peter Wemm <peter@netplex.com.au>
was likely to be counted as idle time.
Note that we are counting time spent in software interrupt handlers as
interrupt time, so this invalidates the i386 meaning of intr_nesting_level.
Reviewed by: dfr, bde
Tested by: anderson@cs.duke.edu
ES1371 and ES1373 PCI Audio Sound Chips.
The 1371 and 1373 can be found on newer CreativeLabs/Ensoniq
sound cards such as the SoundBlaster PCI 16,64 and 128.
Submitted by: Russell Cattelan <cattelan@thebarn.com>
Obtained from: Parts obtained from linux, but rewritten by Russell
that breaks if you try and compile a kernel before building world, as
is presently required to get past the signal changes. I don't
particularly like doing this, but at least it will mean that a 'make world'
will activate the gcc 2.95.2-specific option in bsd.kern.mk.
host->pci bridge specifically, then add a pcib0 device on the motherboard
for the pci bus to hang off.
Requested by: Anders Andersson <anders@sanyusan.se>
Obtained from: dfr
