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Shutemov" X-Google-Original-From: "Kirill A. Shutemov" Received: by box.localdomain (Postfix, from userid 1000) id 5F04E10132C; Fri, 3 Apr 2020 14:29:31 +0300 (+03) To: akpm@linux-foundation.org, Andrea Arcangeli Cc: Zi Yan , Yang Shi , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv2 0/8] thp/khugepaged improvements and CoW semantics Date: Fri, 3 Apr 2020 14:29:20 +0300 Message-Id: <20200403112928.19742-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.26.0 MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The patchset adds khugepaged selftest (anon-THP only for now), expands cases khugepaged can handle and switches anon-THP copy-on-write handling to 4k. Please review and consider applying. v2: - Fix race in compound page handling; - Add one more test-case for compound page case; - Rework LRU add cache draining; - Typos; Kirill A. Shutemov (8): khugepaged: Add self test khugepaged: Do not stop collapse if less than half PTEs are referenced khugepaged: Drain all LRU caches before scanning pages khugepaged: Drain LRU add pagevec after swapin khugepaged: Allow to callapse a page shared across fork khugepaged: Allow to collapse PTE-mapped compound pages thp: Change CoW semantics for anon-THP khugepaged: Introduce 'max_ptes_shared' tunable Documentation/admin-guide/mm/transhuge.rst | 7 + include/trace/events/huge_memory.h | 3 +- mm/huge_memory.c | 249 +----- mm/khugepaged.c | 184 +++- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/khugepaged.c | 982 +++++++++++++++++++++ 6 files changed, 1153 insertions(+), 273 deletions(-) create mode 100644 tools/testing/selftests/vm/khugepaged.c Reviewed-by: William Kucharski