Author: alc
Date: Tue Dec 14 05:47:35 2010
New Revision: 216425
URL: http://svn.freebsd.org/changeset/base/216425
Log:
Change memguard_fudge() so that it can handle km_max being zero. Not
every platform defines VM_KMEM_SIZE_MAX, and on those platforms km_max
will be zero.
Reviewed by: mdf
Tested by: marius
Modified:
head/sys/vm/memguard.c
Modified: head/sys/vm/memguard.c
==============================================================================
--- head/sys/vm/memguard.c Tue Dec 14 01:28:33 2010 (r216424)
+++ head/sys/vm/memguard.c Tue Dec 14 05:47:35 2010 (r216425)
@@ -184,9 +184,10 @@ memguard_fudge(unsigned long km_size, un
memguard_mapsize = km_max / vm_memguard_divisor;
/* size must be multiple of PAGE_SIZE */
memguard_mapsize = round_page(memguard_mapsize);
- if (memguard_mapsize / (2 * PAGE_SIZE) > mem_pgs)
+ if (memguard_mapsize == 0 ||
+ memguard_mapsize / (2 * PAGE_SIZE) > mem_pgs)
memguard_mapsize = mem_pgs * 2 * PAGE_SIZE;
- if (km_size + memguard_mapsize > km_max)
+ if (km_max > 0 && km_size + memguard_mapsize > km_max)
return (km_max);
return (km_size + memguard_mapsize);
}
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