commit fb8e8375394e1156a5a1e7ba53504b141d2365a8
author Jeremy Fitzhardinge <jeremy@goop.org> Thu Mar 27 17:28:39 2008 -0700
committer Ingo Molnar <mingo@elte.hu> Thu Apr 17 17:41:33 2008 +0200
tree 7ac145f029f2bd4e8438bf3a0b28bcc8d1d22614
parent e937fcf2fa0c1d21f9c0008ab600d46c240a984c

x86: sparsemem: reduce i386 PAE section size

A 1G section size makes memory hotplug too coarse in a virtual
environment.  Retuce it by a factor of 2 to 512M.  I would have liked
to make it smaller, but it runs out of reserved flags in the page flags.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/asm-x86/sparsemem.h

diff --git a/include/asm-x86/sparsemem.h b/include/asm-x86/sparsemem.h
index fa684f3..9bd48b0 100644
--- a/include/asm-x86/sparsemem.h
+++ b/include/asm-x86/sparsemem.h
@@ -16,7 +16,7 @@
 
 #ifdef CONFIG_X86_32
 # ifdef CONFIG_X86_PAE
-#  define SECTION_SIZE_BITS	30
+#  define SECTION_SIZE_BITS	29
 #  define MAX_PHYSADDR_BITS	36
 #  define MAX_PHYSMEM_BITS	36
 # else