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authorAndi Kleen <ak@suse.de>2005-09-12 18:49:24 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-12 10:49:56 -0700
commit5d3d0f7704ed0bc7eaca0501eeae3e5da1ea6c87 (patch)
tree7f1f41450a6f1880488f7fd4554a1f2bbd71d391
parent6142891a0c0209c91aa4a98f725de0d6e2ed4918 (diff)
[PATCH] x86-64: Reverse order of bootmem lists
This leads to bootmem allocating first from node 0 instead of from the last node. This avoids swiotlb allocating on the last node, which doesn't really work on a machine with >4GB. Note: there is a better patch around from someone else that gets rid of the pgdat list completely. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--mm/bootmem.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index c1330cc1978..8ec4e4c2a17 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -61,9 +61,17 @@ static unsigned long __init init_bootmem_core (pg_data_t *pgdat,
{
bootmem_data_t *bdata = pgdat->bdata;
unsigned long mapsize = ((end - start)+7)/8;
-
- pgdat->pgdat_next = pgdat_list;
- pgdat_list = pgdat;
+ static struct pglist_data *pgdat_last;
+
+ pgdat->pgdat_next = NULL;
+ /* Add new nodes last so that bootmem always starts
+ searching in the first nodes, not the last ones */
+ if (pgdat_last)
+ pgdat_last->pgdat_next = pgdat;
+ else {
+ pgdat_list = pgdat;
+ pgdat_last = pgdat;
+ }
mapsize = ALIGN(mapsize, sizeof(long));
bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);