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authorAndy Whitcroft <apw@shadowen.org>2006-06-23 02:03:41 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:42:51 -0700
commit30c253e6da655d73eb8bfe2adca9b8f4d82fb81e (patch)
tree97c49ad364855b95ce52d97a62d176a077ff2a85 /include/linux/mmzone.h
parentddc2e812d592457747c4367fb73edcaa8e1e49ff (diff)
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[PATCH] sparsemem: record nid during memory present
Record the node id as we mark sections for instantiation. Use this nid during instantiation to direct allocations. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Mike Kravetz <kravetz@us.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Bob Picco <bob.picco@hp.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Martin Bligh <mbligh@google.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mmzone.h')
-rw-r--r--include/linux/mmzone.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e82fc1a..d6120fa 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -509,6 +509,10 @@ struct mem_section {
* pages. However, it is stored with some other magic.
* (see sparse.c::sparse_init_one_section())
*
+ * Additionally during early boot we encode node id of
+ * the location of the section here to guide allocation.
+ * (see sparse.c::memory_present())
+ *
* Making it a UL at least makes someone do a cast
* before using it wrong.
*/
@@ -548,6 +552,7 @@ extern int __section_nr(struct mem_section* ms);
#define SECTION_HAS_MEM_MAP (1UL<<1)
#define SECTION_MAP_LAST_BIT (1UL<<2)
#define SECTION_MAP_MASK (~(SECTION_MAP_LAST_BIT-1))
+#define SECTION_NID_SHIFT 2
static inline struct page *__section_mem_map_addr(struct mem_section *section)
{
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