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=DKIM_SIGNED,DKIM_VALID, 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 3ABE6C43331 for ; Fri, 3 Apr 2020 11:30:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E6B5208FE for ; Fri, 3 Apr 2020 11:30:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="ElPWX9Fb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390595AbgDCL3f (ORCPT ); Fri, 3 Apr 2020 07:29:35 -0400 Received: from mail-lj1-f173.google.com ([209.85.208.173]:34113 "EHLO mail-lj1-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727927AbgDCL3f (ORCPT ); Fri, 3 Apr 2020 07:29:35 -0400 Received: by mail-lj1-f173.google.com with SMTP id p10so6611610ljn.1 for ; Fri, 03 Apr 2020 04:29:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ivrfh7z+5XsuRxl0JPRhZnQ37vhg7rSvfqWMZmGEcXs=; b=ElPWX9FbdM6JPGRFIhhPZkGVO5q7IJ1VgQALnpLlFSnI9ZJMC3+AvZ3qYMpPvMuW7P yQfRGnrF240fVWbn+OlPwFypuWdv1zc3muz+A/l1iSU2i6Xwjb8DnyVWJFC+aOo7svHx RnAA5e8Qv11UmdY0qYR8/m1wG+1Ac9SqjaaFzlZlnxbLr9YQgqGBH9OigINjT2wwqD+K Q887i99gVLiASa8scRXEZ4blo3XrR8kF7SUYms1UCGTC1BrTVSB4RlieRWPBztg1pCqn wbwK0NtOWWBUnImOz3CevhQGKXWO9n/4PJhEI2pPcDFguxrkVZPFscvrrtpu4FnGYxaD YCIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ivrfh7z+5XsuRxl0JPRhZnQ37vhg7rSvfqWMZmGEcXs=; b=hrG8/JYDN5mkD+oSIIKwYHT3XQZ7n51hlVbfLR4D09XC3N2SoADbhBr9/U4TBUCrYM Qn6fAryQbcIVMm9AEYTgRvrn4cQ12eP5x5LiVfVBr/XtiY5rkp/RBh8GVX/3QuPTQ5m3 nAM9zkQ+JNYSRvhQjRd+IHe4AUoRM4FYfpdedew1ha3yeRFYpbVEdfy0AbUnLMYrWqCY BdOhQfqK/hUoSIr8JyNEtEfc3yck9TLuMXvZ2vUClMmxUPiNBa4q0EhG3bDu/sYOu/33 rEh8kXacBZe0Kyd/0HyW1J27CmDe+ofeLkfR1agvixfnovypu4VjY4jg8Xcfni0ds9lt PZew== X-Gm-Message-State: AGi0PuYet8w1HohCI+xfxELQjQ6+Y5HB3CSdB8cq5VorAtCODajbEiCA 3wMcfzuut+VUZFJX45n4Uml3Ig== X-Google-Smtp-Source: APiQypKIsAU7hf9BDVG0hZw+U8GteBcrKYt9kbqLTPjGC/HdKoijoAe0wnebTjPQfo1qKqZ+NTrbEg== X-Received: by 2002:a2e:9652:: with SMTP id z18mr110590ljh.79.1585913372734; Fri, 03 Apr 2020 04:29:32 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id v9sm4914153ljv.82.2020.04.03.04.29.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2020 04:29:32 -0700 (PDT) From: "Kirill A. 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 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. 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 -- 2.26.0