Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ad0931...
Commit: ad09315cad17458e51c7f1f8b371cb942c54b955
Parent: e123dd3f0ec1664576456ea1ea045591a0a95f0c
Author: Yinghai Lu <yhlu.kernel@gmail.com>
AuthorDate: Mon Mar 10 23:23:42 2008 -0700
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Sat Apr 26 22:51:07 2008 +0200
mm: fix alloc_bootmem_core to use fast searching for all nodes
Make the nodes other than node 0 use bdata->last_success for fast
search too.
We need to use __alloc_bootmem_core() for vmemmap allocation for other
nodes when numa and sparsemem/vmemmap are enabled.
Also, make fail_block path increase i with incr only after ALIGN
to avoid extra increase when size is larger than align.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
mm/bootmem.c | 18 ++++++++++++------
1 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 2ccea70..3c012fb 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -238,28 +238,32 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
* We try to allocate bootmem pages above 'goal'
* first, then we try to allocate lower pages.
*/
- if (goal && goal >= bdata->node_boot_start && PFN_DOWN(goal) < end_pfn) {
- preferred = goal - bdata->node_boot_start;
+ preferred = 0;
+ if (goal && PFN_DOWN(goal) < end_pfn) {
+ if (goal > bdata->node_boot_start)
+ preferred = goal - bdata->node_boot_start;
if (bdata->last_success >= preferred)
if (!limit || (limit && limit > bdata->last_success))
preferred = bdata->last_success;
- } else
- preferred = 0;
+ }
preferred = PFN_DOWN(ALIGN(preferred, align)) + offset;
areasize = (size + PAGE_SIZE-1) / PAGE_SIZE;
incr = align >> PAGE_SHIFT ? : 1;
restart_scan:
- for (i = preferred; i < eidx; i += incr) {
+ for (i = preferred; i < eidx;) {
unsigned long j;
+
i = find_next_zero_bit(bdata->node_bootmem_map, eidx, i);
i = ALIGN(i, incr);
if (i >= eidx)
break;
- if (test_bit(i, bdata->node_bootmem_map))
+ if (test_bit(i, bdata->node_bootmem_map)) {
+ i += incr;
continue;
+ }
for (j = i + 1; j < i + areasize; ++j) {
if (j >= eidx)
goto fail_block;
@@ -270,6 +274,8 @@ restart_scan:
goto found;
fail_block:
i = ALIGN(j, incr);
+ if (i == j)
+ i += incr;
}
if (preferred > offset) {
--
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