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[PATCH] x86-64: Reverse order of bootmem lists

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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>
This commit is contained in:
Andi Kleen 2005-09-12 18:49:24 +02:00 committed by Linus Torvalds
parent 6142891a0c
commit 5d3d0f7704
1 changed files with 10 additions and 2 deletions
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12
mm/bootmem.c
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@ -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;
static struct pglist_data *pgdat_last;
pgdat->pgdat_next = pgdat_list;
pgdat_list = pgdat;
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);