svn commit: r246929 - head/sys/arm/include
Alan Cox
alc at FreeBSD.org
Mon Feb 18 01:22:21 UTC 2013
Author: alc
Date: Mon Feb 18 01:22:20 2013
New Revision: 246929
URL: http://svnweb.freebsd.org/changeset/base/246929
Log:
Place a cap on the size of the kernel's heap, also known as the kmem
submap. Otherwise, after r246204, the auto-scaling logic in kern_malloc.c
tries to create a kmem submap that consumes the entire kernel map on a
Pandaboard with 1 GB of RAM.
Tested by: gonzo
Modified:
head/sys/arm/include/vmparam.h
Modified: head/sys/arm/include/vmparam.h
==============================================================================
--- head/sys/arm/include/vmparam.h Mon Feb 18 01:14:21 2013 (r246928)
+++ head/sys/arm/include/vmparam.h Mon Feb 18 01:22:20 2013 (r246929)
@@ -145,6 +145,14 @@
#define VM_KMEM_SIZE_SCALE (2)
#endif
+/*
+ * Ceiling on the size of the kmem submap: 60% of the kernel map.
+ */
+#ifndef VM_KMEM_SIZE_MAX
+#define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
+ VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5)
+#endif
+
#define MAXTSIZ (16*1024*1024)
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024)
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