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Message-Id: <20210413104747.12177-8-osalvador@suse.de>
Date: Tue, 13 Apr 2021 12:47:47 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Mike Kravetz <mike.kravetz@...cle.com>,
Vlastimil Babka <vbabka@...e.cz>,
David Hildenbrand <david@...hat.com>,
Michal Hocko <mhocko@...nel.org>,
Muchun Song <songmuchun@...edance.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v7 7/7] mm,page_alloc: Drop unnecessary checks from pfn_range_valid_contig
pfn_range_valid_contig() bails out when it finds an in-use page or a
hugetlb page, among other things.
We can drop the in-use page check since __alloc_contig_pages can migrate
away those pages, and the hugetlb page check can go too since
isolate_migratepages_range is now capable of dealing with hugetlb pages.
Either way, those checks are racy so let the end function handle it
when the time comes.
Signed-off-by: Oscar Salvador <osalvador@...e.de>
Suggested-by: David Hildenbrand <david@...hat.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
---
mm/page_alloc.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b5a94de3cdde..c5338e912ace 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8901,12 +8901,6 @@ static bool pfn_range_valid_contig(struct zone *z, unsigned long start_pfn,
if (PageReserved(page))
return false;
-
- if (page_count(page) > 0)
- return false;
-
- if (PageHuge(page))
- return false;
}
return true;
}
--
2.16.3
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