From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: [PATCH 06/12] mm/vmscan: Optimise shrink_page_list for non-PMD-sized folios
Date: Sun, 16 Jan 2022 12:18:16 +0000 [thread overview]
Message-ID: <20220116121822.1727633-7-willy@infradead.org> (raw)
In-Reply-To: <20220116121822.1727633-1-willy@infradead.org>
A large folio which is smaller than a PMD does not need to do the extra
work in try_to_unmap() of trying to split a PMD entry.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
mm/vmscan.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 45665874082d..3181bf2f8a37 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1754,7 +1754,8 @@ static unsigned int shrink_page_list(struct list_head *page_list,
enum ttu_flags flags = TTU_BATCH_FLUSH;
bool was_swapbacked = PageSwapBacked(page);
- if (unlikely(PageTransHuge(page)))
+ if (PageTransHuge(page) &&
+ thp_order(page) >= HPAGE_PMD_ORDER)
flags |= TTU_SPLIT_HUGE_PMD;
try_to_unmap(page, flags);
--
2.34.1
next prev parent reply other threads:[~2022-01-16 12:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-16 12:18 [PATCH 00/12] Enabling large folios for 5.17 Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 01/12] mm: Add folio_put_refs() Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 02/12] filemap: Use folio_put_refs() in filemap_free_folio() Matthew Wilcox (Oracle)
2022-01-17 15:56 ` Kirill A. Shutemov
2022-01-17 16:11 ` Matthew Wilcox
2022-01-16 12:18 ` [PATCH 03/12] filemap: Allow large folios to be added to the page cache Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 04/12] mm/vmscan: Free non-shmem folios without splitting them Matthew Wilcox (Oracle)
2022-01-17 16:06 ` Kirill A. Shutemov
2022-01-17 16:10 ` Matthew Wilcox
2022-01-17 21:00 ` Kirill A. Shutemov
2022-01-16 12:18 ` [PATCH 05/12] mm: Fix READ_ONLY_THP warning Matthew Wilcox (Oracle)
2022-01-16 12:18 ` Matthew Wilcox (Oracle) [this message]
2022-01-16 12:18 ` [PATCH 07/12] mm: Make large folios depend on THP Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 08/12] mm/readahead: Add large folio readahead Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 09/12] mm/readahead: Align file mappings for non-DAX Matthew Wilcox (Oracle)
2022-01-17 3:17 ` Rongwei Wang
2022-01-17 4:40 ` Matthew Wilcox
2022-01-16 12:18 ` [PATCH 10/12] mm/readahead: Switch to page_cache_ra_order Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 11/12] mm/filemap: Support VM_HUGEPAGE for file mappings Matthew Wilcox (Oracle)
2022-01-16 12:18 ` [PATCH 12/12] selftests/vm/transhuge-stress: Support file-backed PMD folios Matthew Wilcox (Oracle)
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