kern/168212: [kernel] [patch] some suggested additions for uma_core.c

[Mark Linimon]

>Number:         168212
>Category:       kern
>Synopsis:       [kernel] [patch] some suggested additions for uma_core.c
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue May 22 03:10:02 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Mark Linimon
>Release:        FreeBSD 9.0-STABLE i386
>Organization:
FreeBSD
>Environment:
System: FreeBSD freefall.freebsd.org 9.0-STABLE FreeBSD 9.0-STABLE #6 r235139: Tue May 8 21:19:03 UTC 2012 simon at freefall.freebsd.org:/usr/obj/usr/src/sys/FREEFALL i386
>Description:
While trying to debug a problem for a customer, I've found the following
additional code to be helfpul.  Perhaps it is useful enough for others?
>How-To-Repeat:
>Fix:
Index: uma_core.c
===================================================================
RCS file: /home/FreeBSD/ncvs/src/sys/vm/uma_core.c,v
retrieving revision 1.173
diff -u -r1.173 uma_core.c
--- uma_core.c	27 Jan 2012 20:18:31 -0000	1.173
+++ uma_core.c	22 May 2012 02:57:20 -0000
@@ -3160,6 +3160,10 @@
 	    keg->uk_ipers, keg->uk_ppera,
 	    (keg->uk_ipers * keg->uk_pages) - keg->uk_free, keg->uk_free,
 	    (keg->uk_maxpages / keg->uk_ppera) * keg->uk_ipers);
+	printf("pages %d maxpages %d slabzone %p\n",
+	    keg->uk_pages,
+	    keg->uk_maxpages,
+	    keg->uk_slabzone);
 	printf("Part slabs:\n");
 	LIST_FOREACH(slab, &keg->uk_part_slab, us_link)
 		slab_print(slab);
@@ -3388,3 +3392,10 @@
 	}
 }
 #endif
+
+DB_SHOW_COMMAND(kegs, db_show_kegs)
+{
+	db_printf("master kegs at %p:\n", kegs);
+	uma_print_zone(kegs);
+}
+#endif
>Release-Note:
>Audit-Trail:
>Unformatted: