- 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_int.h b/sys/vm/uma_int.h
index d7c86bb..e09d549 100644
--- a/sys/vm/uma_int.h
+++ b/sys/vm/uma_int.h
@@ -273,6 +273,7 @@ struct uma_zone {
 #define UMA_ZFLAG_MALLOC	0x0008	/* Zone created by malloc */
 #define UMA_ZFLAG_NOFREE	0x0010	/* Don't free data from this zone */
 #define UMA_ZFLAG_FULL		0x0020	/* This zone reached uz_maxpages */
+#define UMA_ZFLAG_BUCKETCACHE	0x0040	/* Only allocate buckets from cache */
 
 /* This lives in uflags */
 #define UMA_ZONE_INTERNAL	0x1000	/* Internal zone for uflags */