The patch titled
Subject: mm/hugetlb: take the free hpage during the iteration directly
has been removed from the -mm tree. Its filename was
mm-hugetlb-take-the-free-hpage-during-the-iteration-directly.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Subject: mm/hugetlb: take the free hpage during the iteration directly
Function dequeue_huge_page_node_exact() iterates the free list and return
the first valid free hpage.
Instead of break and check the loop variant, we could return in the loop
directly. This could reduce some redundant check.
[mike.kravetz@xxxxxxxxxx: points out a logic error]
[richard.weiyang@xxxxxxxxxxxxxxxxx: v4]
Link: https://lkml.kernel.org/r/20200901014636.29737-8-richard.weiyang@xxxxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20200831022351.20916-8-richard.weiyang@xxxxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
--- a/mm/hugetlb.c~mm-hugetlb-take-the-free-hpage-during-the-iteration-directly
+++ a/mm/hugetlb.c
@@ -1040,21 +1040,17 @@ static struct page *dequeue_huge_page_no
if (nocma && is_migrate_cma_page(page))
continue;
- if (!PageHWPoison(page))
- break;
+ if (PageHWPoison(page))
+ continue;
+
+ list_move(&page->lru, &h->hugepage_activelist);
+ set_page_refcounted(page);
+ h->free_huge_pages--;
+ h->free_huge_pages_node[nid]--;
+ return page;
}
- /*
- * if 'non-isolated free hugepage' not found on the list,
- * the allocation fails.
- */
- if (&h->hugepage_freelists[nid] == &page->lru)
- return NULL;
- list_move(&page->lru, &h->hugepage_activelist);
- set_page_refcounted(page);
- h->free_huge_pages--;
- h->free_huge_pages_node[nid]--;
- return page;
+ return NULL;
}
static struct page *dequeue_huge_page_nodemask(struct hstate *h, gfp_t gfp_mask, int nid,
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxxxxxxxxxx are
mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle.patch
bitops-simplify-get_count_order_long.patch
bitops-use-the-same-mechanism-for-get_count_order.patch
