svn commit: r271944 - head/sys/kern

[Sean Bruno]

Author: sbruno
Date: Mon Sep 22 05:07:22 2014
New Revision: 271944
URL: http://svnweb.freebsd.org/changeset/base/271944

Log:
  svn revisions r269964 and r269963 seemed to have impaired small memory
  footprint systems(32M/64M) and didn't leave enough free memory to load modules
  when it was setting up page tables that for sizes that are never used on
  these smallish boards.
  
  Set kmem_zmax to PAGE_SIZE on these smaller systems (< 128M) to keep this
  from happening. Verified on mips32 h/w.
  
  PR:             193465
  Submitted by:   delphij
  Reviewed by:    adrian

Modified:
  head/sys/kern/kern_malloc.c

Modified: head/sys/kern/kern_malloc.c
==============================================================================
--- head/sys/kern/kern_malloc.c	Mon Sep 22 05:00:55 2014	(r271943)
+++ head/sys/kern/kern_malloc.c	Mon Sep 22 05:07:22 2014	(r271944)
@@ -717,6 +717,8 @@ kmeminit(void)
 	 * a given architecture.
 	 */
 	mem_size = vm_cnt.v_page_count;
+	if (mem_size <= 32768) /* delphij XXX 128MB */
+		kmem_zmax = PAGE_SIZE;
 
 	if (vm_kmem_size_scale < 1)
 		vm_kmem_size_scale = VM_KMEM_SIZE_SCALE;