[merged] mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk.patch removed from -mm tree

[merged] mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk.patch removed from -mm tree

[akpm]

The patch titled
     Subject: mm: bootmem: drop superfluous range check when freeing pages in bulk
has been removed from the -mm tree.  Its filename was
     mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk.patch

This patch was dropped because it was merged into mainline or a subsystem tree

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
From: Johannes Weiner <hannes@cmpxchg.org>
Subject: mm: bootmem: drop superfluous range check when freeing pages in bulk

The area node_bootmem_map represents is aligned to BITS_PER_LONG, and all
bits in any aligned word of that map valid.  When the represented area
extends beyond the end of the node, the non-existant pages will be marked
as reserved.

As a result, when freeing a page block, doing an explicit range check for
whether that block is within the node's range is redundant as the bitmap
is consulted anyway to see whether all pages in the block are unreserved.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/bootmem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/bootmem.c~mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk mm/bootmem.c
--- a/mm/bootmem.c~mm-bootmem-drop-superfluous-range-check-when-freeing-pages-in-bulk
+++ a/mm/bootmem.c
@@ -197,7 +197,7 @@ static unsigned long __init free_all_boo
 		idx = start - bdata->node_min_pfn;
 		vec = ~map[idx / BITS_PER_LONG];
 
-		if (aligned && vec == ~0UL && start + BITS_PER_LONG <= end) {
+		if (aligned && vec == ~0UL) {
 			int order = ilog2(BITS_PER_LONG);
 
 			__free_pages_bootmem(pfn_to_page(start), order);
_

Patches currently in -mm which might be from hannes@cmpxchg.org are

origin.patch
linux-next.patch
memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch
memcg-make-mem_cgroup_split_huge_fixup-more-efficient.patch
memcg-fix-pgpgin-pgpgout-documentation.patch
mm-memcg-clean-up-fault-accounting-fix.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
oom-memcg-fix-exclusion-of-memcg-threads-after-they-have-detached-their-mm.patch
memcg-simplify-page-cache-charging.patch
memcg-simplify-corner-case-handling-of-lru.patch
memcg-clear-pc-mem_cgorup-if-necessary.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-2.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-2-fix.patch
memcg-clear-pc-mem_cgorup-if-necessary-comments.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-3.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-page-migration-to-reset_owner.patch
memcg-simplify-lru-handling-by-new-rule.patch
memcg-simplify-lru-handling-by-new-rule-fix.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix-null-mem_cgroup_try_charge.patch
memcg-cleanup-for_each_node_state.patch
page_alloc-break-early-in-check_for_regular_memory.patch
page_cgroup-drop-multi-config_memory_hotplug.patch
vmscan-trace-add-file-info-to-trace_mm_vmscan_lru_isolate.patch
memcg-fix-split_huge_page_refcounts.patch
memcg-fix-mem_cgroup_print_bad_page.patch
mm-rearrange-putback_inactive_pages.patch

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