The patch titled
Subject: mm/hugetlb: remove redundant check in preparing and destroying gigantic page
has been added to the -mm tree. Its filename is
mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page.patch
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------------------------------------------------------
From: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>
Subject: mm/hugetlb: remove redundant check in preparing and destroying gigantic page
Gigantic page is a compound page and its order is more than 1. Thus it
must be available for hpage_pincount. Let's remove the redundant check
for gigantic page.
Link: https://lkml.kernel.org/r/20210202112002.73170-1-yanfei.xu@xxxxxxxxxxxxx
Signed-off-by: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/mm/hugetlb.c~mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page
+++ a/mm/hugetlb.c
@@ -1234,8 +1234,7 @@ static void destroy_compound_gigantic_pa
struct page *p = page + 1;
atomic_set(compound_mapcount_ptr(page), 0);
- if (hpage_pincount_available(page))
- atomic_set(compound_pincount_ptr(page), 0);
+ atomic_set(compound_pincount_ptr(page), 0);
for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) {
clear_compound_head(p);
@@ -1563,9 +1562,7 @@ static void prep_compound_gigantic_page(
set_compound_head(p, page);
}
atomic_set(compound_mapcount_ptr(page), -1);
-
- if (hpage_pincount_available(page))
- atomic_set(compound_pincount_ptr(page), 0);
+ atomic_set(compound_pincount_ptr(page), 0);
}
/*
_
Patches currently in -mm which might be from yanfei.xu@xxxxxxxxxxxxx are
mm-hugetlb-remove-redundant-check-in-preparing-and-destroying-gigantic-page.patch
