Author: markj
Date: Wed Aug 29 17:58:01 2018
New Revision: 338389
URL: https://svnweb.freebsd.org/changeset/base/338389
Log:
MFC r332968:
Add a UMA zone flag to disable the use of buckets.
Modified:
stable/11/sys/vm/uma.h
stable/11/sys/vm/uma_core.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/vm/uma.h
==============================================================================
--- stable/11/sys/vm/uma.h Wed Aug 29 17:51:15 2018 (r338388)
+++ stable/11/sys/vm/uma.h Wed Aug 29 17:58:01 2018 (r338389)
@@ -262,8 +262,8 @@ uma_zone_t uma_zcache_create(char *name, int size, uma
* information in the vm_page.
*/
#define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */
-/* 0x0400 Unused */
-#define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets */
+#define UMA_ZONE_NOBUCKET 0x0400 /* Do not use buckets. */
+#define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets. */
#define UMA_ZONE_CACHESPREAD 0x1000 /*
* Spread memory start locations across
* all possible cache lines. May
Modified: stable/11/sys/vm/uma_core.c
==============================================================================
--- stable/11/sys/vm/uma_core.c Wed Aug 29 17:51:15 2018 (r338388)
+++ stable/11/sys/vm/uma_core.c Wed Aug 29 17:58:01 2018 (r338389)
@@ -1644,10 +1644,15 @@ zone_ctor(void *mem, int size, void *udata, int flags)
}
out:
- if ((arg->flags & UMA_ZONE_MAXBUCKET) == 0)
- zone->uz_count = bucket_select(zone->uz_size);
- else
+ KASSERT((arg->flags & (UMA_ZONE_MAXBUCKET | UMA_ZONE_NOBUCKET)) !=
+ (UMA_ZONE_MAXBUCKET | UMA_ZONE_NOBUCKET),
+ ("Invalid zone flag combination"));
+ if ((arg->flags & UMA_ZONE_MAXBUCKET) != 0)
zone->uz_count = BUCKET_MAX;
+ else if ((arg->flags & UMA_ZONE_NOBUCKET) != 0)
+ zone->uz_count = 0;
+ else
+ zone->uz_count = bucket_select(zone->uz_size);
zone->uz_count_min = zone->uz_count;
return (0);
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