kmem_cache hardening and performance improvements

- Added slab work queue task which gradually ages and free's slabs
  from the cache which have not been used recently.
- Optimized slab packing algorithm to ensure each slab contains the
  maximum number of objects without create to large a slab.
- Fix deadlock, we can never call kv_free() under the skc_lock.  We
  now unlink the objects and slabs from the cache itself and attach
  them to a private work list.  The contents of the list are then
  subsequently freed outside the spin lock.
- Move magazine create/destroy operation on to local cpu.
- Further performace optimizations by minimize the usage of the large
  per-cache skc_lock.  This includes the addition of KMC_BIT_REAPING
  bit mask which is used to prevent concurrent reaping, and to defer
  new slab creation when reaping is occuring.
- Add KMC_BIT_DESTROYING bit mask which is set when the cache is being
  destroyed, this is used to catch any task accessing the cache while
  it is being destroyed.
- Add comments to all the functions and additional comments to try
  and make everything as clear as possible.
- Major cleanup and additions to the SPLAT kmem tests to more
  rigerously stress the cache implementation and look for any problems.
  This includes correctness and performance tests.
- Updated portable work queue interfaces

1 files changed, 0 insertions, 12 deletions

diff --git a/include/sys/sysmacros.h b/include/sys/sysmacros.h
index 94ff3f84e..b82812385 100644
--- a/include/sys/sysmacros.h
+++ b/include/sys/sysmacros.h
@@ -203,18 +203,6 @@ extern int ddi_strtoul(const char *str, char **nptr,
 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 #endif
 
-#ifdef HAVE_3ARGS_INIT_WORK
-
-#define spl_init_work(wq,cb,d)	INIT_WORK((wq), (void *)(cb), (void *)(d))
-#define spl_get_work_data(type,field,data)	(data)
-
-#else
-
-#define spl_init_work(wq,cb,d)	INIT_WORK((wq), (void *)(cb));
-#define spl_get_work_data(type,field,data)	container_of(data,type,field)
-
-#endif
-
 #ifdef  __cplusplus
 }
 #endif