The patch titled
Subject: mm: page_alloc: remove order assumption from __free_pages_bootmem()
has been removed from the -mm tree. Its filename was
mm-page_alloc-remove-order-assumption-from-__free_pages_bootmem.patch
This patch was dropped because it is obsolete
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: page_alloc: remove order assumption from __free_pages_bootmem()
Even though bootmem passes an order with the page to be freed,
__free_pages_bootmem() assumes that 1 << order is always BITS_PER_LONG
if non-zero. While this happens to be true, it's not really robust.
Remove that assumption and use 1 << order instead.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/page_alloc.c~mm-page_alloc-remove-order-assumption-from-__free_pages_bootmem mm/page_alloc.c
--- a/mm/page_alloc.c~mm-page_alloc-remove-order-assumption-from-__free_pages_bootmem
+++ a/mm/page_alloc.c
@@ -755,12 +755,14 @@ void __meminit __free_pages_bootmem(stru
__free_page(page);
} else {
int loop;
+ unsigned int nr_pages = 1 << order;
+ unsigned int loop;
prefetchw(page);
- for (loop = 0; loop < (1 << order); loop++) {
+ for (loop = 0; loop < nr_pages; loop++) {
struct page *p = &page[loop];
- if (loop + 1 < (1 << order))
+ if (loop + 1 < nr_pages)
prefetchw(p + 1);
__ClearPageReserved(p);
set_page_count(p, 0);
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
linux-next.patch
memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch
memcg-keep-root-group-unchanged-if-creation-fails.patch
mm-page-writebackc-make-determine_dirtyable_memory-static-again.patch
vmscan-promote-shared-file-mapped-pages.patch
vmscan-activate-executable-pages-after-first-usage.patch
mm-do-not-stall-in-synchronous-compaction-for-thp-allocations.patch
mm-do-not-stall-in-synchronous-compaction-for-thp-allocations-v3.patch
vmscan-add-task-name-to-warn_scan_unevictable-messages.patch
mm-page_alloc-generalize-order-handling-in-__free_pages_bootmem.patch
mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk.patch
mm-bootmem-try-harder-to-free-pages-in-bulk.patch
memcg-make-mem_cgroup_split_huge_fixup-more-efficient.patch
memcg-fix-pgpgin-pgpgout-documentation.patch
mm-page_cgroup-check-page_cgroup-arrays-in-lookup_page_cgroup-only-when-necessary.patch
page_cgroup-add-helper-function-to-get-swap_cgroup-cleanup.patch
memcg-clean-up-soft_limit_tree-if-allocation-fails.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
