svn commit: r281109 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Sun Apr  5 14:45:52 2015
New Revision: 281109
URL: https://svnweb.freebsd.org/changeset/base/281109

Log:
  Add DTrace probe to the new ARC reclaim cause added in r281026.
  
  MFC after:	1 month

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Sun Apr  5 14:17:26 2015	(r281108)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Sun Apr  5 14:45:52 2015	(r281109)
@@ -2671,8 +2671,12 @@ arc_reclaim_needed(void)
 	 * Above limits know nothing about real level of KVA fragmentation.
 	 * Start aggressive reclamation if too little sequential KVA left.
 	 */
-	if (vmem_size(heap_arena, VMEM_MAXFREE) < zfs_max_recordsize)
+	if (vmem_size(heap_arena, VMEM_MAXFREE) < zfs_max_recordsize) {
+		DTRACE_PROBE2(arc__reclaim_maxfree, uint64_t,
+		    vmem_size(heap_arena, VMEM_MAXFREE),
+		    uint64_t, zfs_max_recordsize);
 		return (1);
+	}
 
 #else	/* _KERNEL */
 	if (spa_get_random(100) == 0)