- Introduce the new M_NOVM option which tells uma to only check the currently

  allocated slabs and bucket caches for free items.  It will not go ask the vm
  for pages.  This differs from M_NOWAIT in that it not only doesn't block, it
  doesn't even ask.

- Add a new zcreate option ZONE_VM, that sets the BUCKETCACHE zflag.  This
  tells uma that it should only allocate buckets out of the bucket cache, and
  not from the VM.  It does this by using the M_NOVM option to zalloc when
  getting a new bucket.  This is so that the VM doesn't recursively enter
  itself while trying to allocate buckets for vm_map_entry zones.  If there
  are already allocated buckets when we get here we'll still use them but
  otherwise we'll skip it.

- Use the ZONE_VM flag on vm map entries and pv entries on x86.

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/vm/uma.h b/sys/vm/uma.h
index fb144cf..2b35360 100644
--- a/sys/vm/uma.h
+++ b/sys/vm/uma.h
@@ -173,6 +173,7 @@ uma_zone_t uma_zcreate(char *name, size_t size, uma_ctor ctor, uma_dtor dtor,
 #define UMA_ZONE_MALLOC		0x0010	/* For use by malloc(9) only! */
 #define UMA_ZONE_NOFREE		0x0020	/* Do not free slabs of this type! */
 #define UMA_ZONE_MTXCLASS	0x0040	/* Create a new lock class */
+#define	UMA_ZONE_VM		0x0080	/* Used for internal vm datastructures */
 
 /* Definitions for align */
 #define UMA_ALIGN_PTR	(sizeof(void *) - 1)	/* Alignment fit for ptr */