Ryan Stone 6969ef6656 Correct a series of errors in the hand-rolled locking for drace_debug.c: ... - Use spinlock_enter()/spinlock_exit() to prevent a thread holding a debug lock from being preempted to prevent other threads waiting on that lock from starvation. - Handle the possibility of CPU migration in between the fetch of curcpu and the call to spinlock_enter() by saving curcpu in a local variable. - Use memory barriers to prevent reordering of loads and stores of the data protected by the lock outside of the critical section - Eliminate false sharing of the locks by moving them into the structures that they protect and aligning them to a cacheline boundary. - Record the owning thread in the lock to make debugging future problems easier. Reviewed by: rpaulo (initial version) MFC after: 2 weeks		2012-12-23 15:50:37 +00:00
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cyclic	Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.	2011-11-07 06:44:47 +00:00
dtmalloc	Custom DTrace kernel module files plus FreeBSD-specific DTrace providers.	2008-05-23 05:59:42 +00:00
dtrace	Correct a series of errors in the hand-rolled locking for drace_debug.c:	2012-12-23 15:50:37 +00:00
fbt	Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.	2011-11-07 06:44:47 +00:00
lockstat	Implement DTrace for PowerPC. This includes both 32-bit and 64-bit.	2012-11-07 23:45:09 +00:00
profile	Implement DTrace for PowerPC. This includes both 32-bit and 64-bit.	2012-11-07 23:45:09 +00:00
sdt	Instead of only iterating over the set of known SDT probes when sdt.ko is	2012-03-27 15:07:43 +00:00
systrace	Correct the types of the arguments to return probes of the syscall	2011-11-11 03:49:42 +00:00
prototype.c	Custom DTrace kernel module files plus FreeBSD-specific DTrace providers.	2008-05-23 05:59:42 +00:00