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 73F2EC2BA19 for ; Mon, 13 Apr 2020 10:04:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1AB96206E9 for ; Mon, 13 Apr 2020 10:04:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1AB96206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 74E478E00F7; Mon, 13 Apr 2020 06:04:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6D77D8E0001; Mon, 13 Apr 2020 06:04:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5C6018E00F7; Mon, 13 Apr 2020 06:04:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0030.hostedemail.com [216.40.44.30]) by kanga.kvack.org (Postfix) with ESMTP id 409F38E0001 for ; Mon, 13 Apr 2020 06:04:56 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id F2CC52C06 for ; Mon, 13 Apr 2020 10:04:55 +0000 (UTC) X-FDA: 76702398150.13.soup77_2afd7f08ec357 X-HE-Tag: soup77_2afd7f08ec357 X-Filterd-Recvd-Size: 2885 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by imf13.hostedemail.com (Postfix) with ESMTP for ; Mon, 13 Apr 2020 10:04:55 +0000 (UTC) IronPort-SDR: cYmk/1icPkBDYQnCIGF6bpfiXWKlV7rRdPOzFrGwMETIDZjv5AZTauTrfNWVXU01/bdmrwQV+x tl/wLBCDSPWg== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2020 03:04:53 -0700 IronPort-SDR: Je+nfy1gBfcmk8HF5V1CwbT8pCAFbQD+LTeJsKMDvyDhT0XYupO8D525qm0iwN/yhDKZnw4aZ8 80wrKp9FK+7w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,378,1580803200"; d="scan'208";a="287838816" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 13 Apr 2020 03:04:51 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 6BCE2DE; Mon, 13 Apr 2020 13:04:50 +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: [PATCH 0/6] thp/khugepaged improvements and CoW semantics Date: Mon, 13 Apr 2020 13:04:41 +0300 Message-Id: <20200413100447.20073-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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. 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 (6): 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 mm/khugepaged.c | 172 +++-- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/khugepaged.c | 899 ++++++++++++++++++++++++ 3 files changed, 1012 insertions(+), 60 deletions(-) create mode 100644 tools/testing/selftests/vm/khugepaged.c --=20 2.26.0