From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
David Hildenbrand <david@redhat.com>
Subject: [PATCH 7/7] mm: Introduce offset_in_thp
Date: Mon, 29 Jun 2020 16:19:59 +0100 [thread overview]
Message-ID: <20200629151959.15779-8-willy@infradead.org> (raw)
In-Reply-To: <20200629151959.15779-1-willy@infradead.org>
Mirroring offset_in_page(), this gives you the offset within this
particular page, no matter what size page it is. It optimises down
to offset_in_page() if CONFIG_TRANSPARENT_HUGEPAGE is not set.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
include/linux/mm.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6c29b663135f..3fc7e8121216 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1583,6 +1583,7 @@ static inline void clear_page_pfmemalloc(struct page *page)
extern void pagefault_out_of_memory(void);
#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
+#define offset_in_thp(page, p) ((unsigned long)(p) & (thp_size(page) - 1))
/*
* Flags passed to show_mem() and show_free_areas() to suppress output in
--
2.27.0
next prev parent reply other threads:[~2020-06-29 21:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 15:19 [PATCH 0/7] THP prep patches Matthew Wilcox (Oracle)
2020-06-29 15:19 ` [PATCH 1/7] mm: Store compound_nr as well as compound_order Matthew Wilcox (Oracle)
2020-06-29 16:22 ` Ira Weiny
2020-06-29 16:24 ` Matthew Wilcox
2020-07-06 10:29 ` Kirill A. Shutemov
2020-08-11 22:53 ` Matthew Wilcox
2020-06-29 15:19 ` [PATCH 2/7] mm: Move page-flags include to top of file Matthew Wilcox (Oracle)
2020-06-29 15:19 ` [PATCH 3/7] mm: Add thp_order Matthew Wilcox (Oracle)
2020-06-29 15:19 ` [PATCH 4/7] mm: Add thp_size Matthew Wilcox (Oracle)
2020-06-29 15:19 ` [PATCH 5/7] mm: Replace hpage_nr_pages with thp_nr_pages Matthew Wilcox (Oracle)
2020-06-29 17:40 ` Mike Kravetz
2020-06-29 18:14 ` Matthew Wilcox
2020-06-29 18:32 ` Matthew Wilcox
2020-07-01 1:33 ` Andrew Morton
2020-06-29 15:19 ` [PATCH 6/7] mm: Add thp_head Matthew Wilcox (Oracle)
2020-06-29 15:19 ` Matthew Wilcox (Oracle) [this message]
2020-06-29 17:11 ` [PATCH 0/7] THP prep patches William Kucharski
2020-06-29 18:13 ` Zi Yan
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