The patch titled
mm: use alloc_pages_exact() in alloc_large_system_hash() to avoid duplicated logic
has been removed from the -mm tree. Its filename was
mm-use-alloc_pages_exact-in-alloc_large_system_hash-to-avoid-duplicated-logic.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/
------------------------------------------------------
Subject: mm: use alloc_pages_exact() in alloc_large_system_hash() to avoid duplicated logic
From: Mel Gorman <mel@xxxxxxxxx>
alloc_large_system_hash() has logic for freeing pages at the end of an
excessively large power-of-two buffer that is a duplicate of what is in
alloc_pages_exact(). This patch converts alloc_large_system_hash() to use
alloc_pages_exact().
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Acked-by: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 21 ++++-----------------
1 file changed, 4 insertions(+), 17 deletions(-)
diff -puN mm/page_alloc.c~mm-use-alloc_pages_exact-in-alloc_large_system_hash-to-avoid-duplicated-logic mm/page_alloc.c
--- a/mm/page_alloc.c~mm-use-alloc_pages_exact-in-alloc_large_system_hash-to-avoid-duplicated-logic
+++ a/mm/page_alloc.c
@@ -4699,26 +4699,13 @@ void *__init alloc_large_system_hash(con
else if (hashdist)
table = __vmalloc(size, GFP_ATOMIC, PAGE_KERNEL);
else {
- unsigned long order = get_order(size);
-
- if (order < MAX_ORDER)
- table = (void *)__get_free_pages(GFP_ATOMIC,
- order);
/*
* If bucketsize is not a power-of-two, we may free
- * some pages at the end of hash table.
+ * some pages at the end of hash table which
+ * alloc_pages_exact() automatically does
*/
- if (table) {
- unsigned long alloc_end = (unsigned long)table +
- (PAGE_SIZE << order);
- unsigned long used = (unsigned long)table +
- PAGE_ALIGN(size);
- split_page(virt_to_page(table), order);
- while (used < alloc_end) {
- free_page(used);
- used += PAGE_SIZE;
- }
- }
+ if (get_order(size) < MAX_ORDER)
+ table = alloc_pages_exact(size, GFP_ATOMIC);
}
} while (!table && size > PAGE_SIZE && --log2qty);
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
origin.patch
linux-next.patch
page_alloc-oops-when-setting-percpu_pagelist_fraction.patch
memcg-fix-lru-rotation-in-isolate_pages.patch
add-debugging-aid-for-memory-initialisation-problems.patch
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