+ mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch added to -mm tree

+ mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/vmscan: allow arbitrary sized pages to be paged out
has been added to the -mm tree.  Its filename is
     mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch

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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm/vmscan: allow arbitrary sized pages to be paged out

Remove the assumption that a compound page has HPAGE_PMD_NR pins from the
page cache.

Link: https://lkml.kernel.org/r/20200908195539.25896-12-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/vmscan.c~mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out
+++ a/mm/vmscan.c
@@ -722,8 +722,7 @@ static inline int is_page_cache_freeable
 	 * that isolated the page, the page cache and optional buffer
 	 * heads at page->private.
 	 */
-	int page_cache_pins = PageTransHuge(page) && PageSwapCache(page) ?
-		HPAGE_PMD_NR : 1;
+	int page_cache_pins = thp_nr_pages(page);
 	return page_count(page) - page_has_private(page) == 1 + page_cache_pins;
 }
 
_

Patches currently in -mm which might be from willy@infradead.org are

mm-debug-do-not-dereference-i_ino-blindly.patch
mm-account-pmd-tables-like-pte-tables.patch
mm-move-pagedoublemap-bit.patch
mm-simplify-pagedoublemap-with-pf_second-policy.patch
xarray-add-xa_get_order.patch
xarray-add-xas_split.patch
mm-filemap-fix-storing-to-a-thp-shadow-entry.patch
mm-filemap-fix-page-cache-removal-for-arbitrary-sized-thps.patch
mm-memory-remove-page-fault-assumption-of-compound-page-size.patch
mm-page_owner-change-split_page_owner-to-take-a-count.patch
mm-huge_memory-fix-page_trans_huge_mapcount-assumption-of-thp-size.patch
mm-huge_memory-fix-can_split_huge_page-assumption-of-thp-size.patch
mm-rmap-fix-assumptions-of-thp-size.patch
mm-truncate-fix-truncation-for-pages-of-arbitrary-size.patch
mm-page-writeback-support-tail-pages-in-wait_for_stable_page.patch
mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch
mm-readahead-add-define_readahead.patch
mm-readahead-make-page_cache_ra_unbounded-take-a-readahead_control.patch
mm-readahead-make-do_page_cache_ra-take-a-readahead_control.patch
mm-readahead-add-page_cache_sync_ra-and-page_cache_async_ra.patch
harden-autofs-ioctl-table.patch