Add another flag to the vmalloc subsystem to mark virtual compound pages.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/vmalloc.h | 1 +
mm/vmalloc.c | 3 +++
2 files changed, 4 insertions(+)
Index: linux-2.6.25-rc5-mm1/include/linux/vmalloc.h
===================================================================
--- linux-2.6.25-rc5-mm1.orig/include/linux/vmalloc.h 2008-03-19 18:17:42.093443900 -0700
+++ linux-2.6.25-rc5-mm1/include/linux/vmalloc.h 2008-03-19 18:27:20.150422445 -0700
@@ -12,6 +12,7 @@ struct vm_area_struct;
#define VM_MAP 0x00000004 /* vmap()ed pages */
#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
+#define VM_VCOMPOUND 0x00000020 /* Page allocator fallback */
/* bits [20..32] reserved for arch specific ioremap internals */
/*
Index: linux-2.6.25-rc5-mm1/mm/vmalloc.c
===================================================================
--- linux-2.6.25-rc5-mm1.orig/mm/vmalloc.c 2008-03-19 18:18:02.689633934 -0700
+++ linux-2.6.25-rc5-mm1/mm/vmalloc.c 2008-03-19 18:27:20.150422445 -0700
@@ -974,6 +974,9 @@ static int s_show(struct seq_file *m, vo
if (v->flags & VM_VPAGES)
seq_printf(m, " vpages");
+ if (v->flags & VM_VCOMPOUND)
+ seq_printf(m, " vcompound");
+
seq_putc(m, '\n');
return 0;
}
--
--
