- Resolve bucket recursion issues by passing a cookie with zone flags

   through bucket_alloc() to uma_zalloc_arg() and uma_zfree_arg().
 - Make some smaller buckets for large zones to further reduce memory
   waste.
 - Implement uma_zone_reserve().  This holds aside a number of items only
   for callers who specify M_USE_RESERVE.  buckets will never be filled
   from reserve allocations.

Sponsored by:	EMC / Isilon Storage Division

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/vm/uma.h b/sys/vm/uma.h
index 91bd6a5..b4fb4e8 100644
--- a/sys/vm/uma.h
+++ b/sys/vm/uma.h
@@ -459,6 +459,12 @@ void uma_reclaim(void);
 void uma_set_align(int align);
 
 /*
+ * Set a reserved number of items to hold for M_USE_RESERVE allocations.  All
+ * other requests must allocate new backing pages.
+ */
+void uma_zone_reserve(uma_zone_t zone, int nitems);
+
+/*
  * Reserves the maximum KVA space required by the zone and configures the zone
  * to use a VM_ALLOC_NOOBJ-based backend allocator.
  *