From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3EA67C2BB55 for ; Thu, 16 Apr 2020 16:01:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E8A721924 for ; Thu, 16 Apr 2020 16:01:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2506816AbgDPQBh (ORCPT ); Thu, 16 Apr 2020 12:01:37 -0400 Received: from mga14.intel.com ([192.55.52.115]:40294 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2636404AbgDPQAm (ORCPT ); Thu, 16 Apr 2020 12:00:42 -0400 IronPort-SDR: g/XFrmyn5GwHB/99h6aH5bxxV06mE5I3+7kN0X3X60a0RMe8qOgHfCHxQCcC+NYMrlEewS1Kg6 yAscooNY1Yxw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2020 09:00:37 -0700 IronPort-SDR: pDMNkWvYNHv1ubiGEOcKw/KAQTj5tzHAVB/4Q19JN+AEY6d4sLqBsaG9vLrsgh1d22eY0Z521B sV9XGTvo7wyA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,391,1580803200"; d="scan'208";a="455314877" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga006.fm.intel.com with ESMTP; 16 Apr 2020 09:00:34 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 3FAC717F; Thu, 16 Apr 2020 19:00:31 +0300 (EEST) From: "Kirill A. Shutemov" To: akpm@linux-foundation.org, Andrea Arcangeli Cc: Zi Yan , Yang Shi , Ralph Campbell , John Hubbard , William Kucharski , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv4 0/8] thp/khugepaged improvements and CoW semantics Date: Thu, 16 Apr 2020 19:00:18 +0300 Message-Id: <20200416160026.16538-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. v4: - Rebase to v5.7-rc1; - Minor adjustments based on feedback: comments/messages/whitespace - Apply Reviewed/Acked/Tested-by; v3: - Fix handling compound pages in swap cache; - Rework swaped vs. referenced check; - Fix refcounting for compound pages; - Drop Reviewed-by/Acked-by as patchset changed non-trivially; - Typos; 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 collapse 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 | 250 +----- mm/khugepaged.c | 220 +++-- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/khugepaged.c | 982 +++++++++++++++++++++ 6 files changed, 1175 insertions(+), 288 deletions(-) create mode 100644 tools/testing/selftests/vm/khugepaged.c -- 2.26.1