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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 BDBB9C4320E for ; Wed, 4 Aug 2021 02:00:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C29060E78 for ; Wed, 4 Aug 2021 02:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234146AbhHDCAV (ORCPT ); Tue, 3 Aug 2021 22:00:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229869AbhHDCAT (ORCPT ); Tue, 3 Aug 2021 22:00:19 -0400 Received: from mail-ej1-x62e.google.com (mail-ej1-x62e.google.com [IPv6:2a00:1450:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA76DC06175F for ; Tue, 3 Aug 2021 19:00:07 -0700 (PDT) Received: by mail-ej1-x62e.google.com with SMTP id hw6so1342537ejc.10 for ; Tue, 03 Aug 2021 19:00:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=KnuZs/g8Oew5RJJwXI/t9ztON31nLnDM5yCpxcP3G5Y=; b=M+OBkl7Ni519XngieCIV8Nw7Z3EiKgKSxTlp7loQj9h9rhj3+EAkRpflcKTj02vYCr T+a5qt2T4XvSU2J3rpwVHUGXIabN167Bq1GNqy/pNlomMwnmc+iG3CxMGxZhV8JVMaLf woHlclSeqZP9UqG8RTivp2FtSH94w/Ul8yTnYGkz4RRRzH/ZIzRNoPP4PNX5Ei+d0uGb ZlHPg9s7oF50/OtM7981W/R0vLRyp9zy6jix2xvKjKH4ShnHXbuURbvJEOqe11u52OGi ckXT2tKfpC/o4vJKAhjZxRd2UIFXlWpCYEF21knP9FNOvsLefIHvzg8JD62mSiEtMh4M X63Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=KnuZs/g8Oew5RJJwXI/t9ztON31nLnDM5yCpxcP3G5Y=; b=hwf18bB4VdUtyTnHMVxxuxLBpYaTtkEynRWc5LctO0Cl2bsPb4VCTTJ2wgkL/uI0Zc /+ab91itLHomitQoxNfX4j0t4dMHslfeFP52F3MaoN+fzmT5jqn1VfjFMiVu9x2XQeYM zM29nMObg+B7UlAvcK10C6XsgEUIdT9UTC7DFltWO4twpRHQY4fz+5f1rJAzVF03d6hU yjTPIPWRwGUsfQ8ixSW6nn9AvGCyYRQNrcTfaNpnXuFqbj7Ubw1TIEhCpVErsqzzxCV8 9JdsgUNi6kEatRstFNZxmYtpEWAwc+3fHqQKbWYcSFQ5WxAFg+1h0wu4Ki1Ij8ZjvmvO OMxA== X-Gm-Message-State: AOAM532qQmCHp004uZMEfdw3Vqek/a4vzKey8+vRmkmdUEtipgbnfn9B U0OrqHpNKacjMLI7GIwQb5P6JNf1L7prCkn1KF1eww== X-Google-Smtp-Source: ABdhPJzrmInWA81g9WZA9syNr4nSHk73VmvWHU0el4ZKHkRh7fMDg0SGz0UdWcEWP/UM/q3b7HX/cmf3n+i0tYBAYck= X-Received: by 2002:a17:906:d20a:: with SMTP id w10mr24376079ejz.426.1628042406564; Tue, 03 Aug 2021 19:00:06 -0700 (PDT) MIME-Version: 1.0 References: <6d0caab00d4bdccf5e3791cb95cf6dfd5eb85e45.1626252248.git.zhansayabagdaulet@gmail.com> In-Reply-To: <6d0caab00d4bdccf5e3791cb95cf6dfd5eb85e45.1626252248.git.zhansayabagdaulet@gmail.com> From: Pavel Tatashin Date: Tue, 3 Aug 2021 21:59:30 -0400 Message-ID: Subject: Re: [PATCH v2 3/4] selftests: vm: add KSM zero page merging test To: Zhansaya Bagdauletkyzy Cc: shuah@kernel.org, Andrew Morton , LKML , linux-kselftest@vger.kernel.org, linux-mm , Tyler Hicks Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 14, 2021 at 4:56 AM Zhansaya Bagdauletkyzy wrote: > > Add check_ksm_zero_page_merge() function to test that empty pages are > being handled properly. For this, several zero pages are allocated and > merged using madvise. If use_zero_pages is enabled, the pages must be > shared with the special kernel zero pages; otherwise, they are merged > as usual duplicate pages. The test is run as follows: ./ksm_tests -Z > > Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin 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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 9D52DC432BE for ; Wed, 4 Aug 2021 02:00:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F005660F70 for ; Wed, 4 Aug 2021 02:00:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F005660F70 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=soleen.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 8F9438D0018; Tue, 3 Aug 2021 22:00:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8A9C98D000F; Tue, 3 Aug 2021 22:00:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 798288D0018; Tue, 3 Aug 2021 22:00:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0158.hostedemail.com [216.40.44.158]) by kanga.kvack.org (Postfix) with ESMTP id 5AC928D000F for ; Tue, 3 Aug 2021 22:00:08 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id E8B781813BCF4 for ; Wed, 4 Aug 2021 02:00:07 +0000 (UTC) X-FDA: 78435742854.09.07D4670 Received: from mail-ej1-f46.google.com (mail-ej1-f46.google.com [209.85.218.46]) by imf22.hostedemail.com (Postfix) with ESMTP id A38EE9890 for ; Wed, 4 Aug 2021 02:00:07 +0000 (UTC) Received: by mail-ej1-f46.google.com with SMTP id qk33so1326473ejc.12 for ; Tue, 03 Aug 2021 19:00:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=KnuZs/g8Oew5RJJwXI/t9ztON31nLnDM5yCpxcP3G5Y=; b=M+OBkl7Ni519XngieCIV8Nw7Z3EiKgKSxTlp7loQj9h9rhj3+EAkRpflcKTj02vYCr T+a5qt2T4XvSU2J3rpwVHUGXIabN167Bq1GNqy/pNlomMwnmc+iG3CxMGxZhV8JVMaLf woHlclSeqZP9UqG8RTivp2FtSH94w/Ul8yTnYGkz4RRRzH/ZIzRNoPP4PNX5Ei+d0uGb ZlHPg9s7oF50/OtM7981W/R0vLRyp9zy6jix2xvKjKH4ShnHXbuURbvJEOqe11u52OGi ckXT2tKfpC/o4vJKAhjZxRd2UIFXlWpCYEF21knP9FNOvsLefIHvzg8JD62mSiEtMh4M X63Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=KnuZs/g8Oew5RJJwXI/t9ztON31nLnDM5yCpxcP3G5Y=; b=Wd+u/5cfC9pPTRbkBRMTwsWHeG/k40f4ftlpE5I/2+8Vd0Kb6BITusjiLuACUMWUlJ laVRHerw61pSv/go4z+s1gLozSM6mXmvUrNOk6RAaQVLMN6e3zr4nrPvmGeVCwSwuEDW N9yWAam1mNBOavZ5wmdCNhmpgJNssGF4wyDKXtVcEpbdCA8uZZNmVm9H/6TLNsJh1Yl4 4IqJMzKbUTPIHLWjo1WKARsFu0PdQDcxe9zPW93YCvDkW3eoZpptQPyhi/p+dB+wIHuC YBrpL12D+rnSP8rtoMFBG78dqdeXNgXFe45UVs4wuG9iJLr9J54ArYo4cwBeac/VaEuq 7Fpg== X-Gm-Message-State: AOAM530X4jUjfWNzilr1m0Yxaku0ieAnleFov/vNMsmrXa+OnBf+uyIR pLK78uq2gyz8gnxex//XLnBPlfu+MK96nejAQHTeOw== X-Google-Smtp-Source: ABdhPJzrmInWA81g9WZA9syNr4nSHk73VmvWHU0el4ZKHkRh7fMDg0SGz0UdWcEWP/UM/q3b7HX/cmf3n+i0tYBAYck= X-Received: by 2002:a17:906:d20a:: with SMTP id w10mr24376079ejz.426.1628042406564; Tue, 03 Aug 2021 19:00:06 -0700 (PDT) MIME-Version: 1.0 References: <6d0caab00d4bdccf5e3791cb95cf6dfd5eb85e45.1626252248.git.zhansayabagdaulet@gmail.com> In-Reply-To: <6d0caab00d4bdccf5e3791cb95cf6dfd5eb85e45.1626252248.git.zhansayabagdaulet@gmail.com> From: Pavel Tatashin Date: Tue, 3 Aug 2021 21:59:30 -0400 Message-ID: Subject: Re: [PATCH v2 3/4] selftests: vm: add KSM zero page merging test To: Zhansaya Bagdauletkyzy Cc: shuah@kernel.org, Andrew Morton , LKML , linux-kselftest@vger.kernel.org, linux-mm , Tyler Hicks Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: A38EE9890 Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=soleen.com header.s=google header.b=M+OBkl7N; dmarc=none; spf=pass (imf22.hostedemail.com: domain of pasha.tatashin@soleen.com designates 209.85.218.46 as permitted sender) smtp.mailfrom=pasha.tatashin@soleen.com X-Stat-Signature: brxqnkhhccmfnh1ksgzywdpnmmn6aper X-HE-Tag: 1628042407-815806 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: On Wed, Jul 14, 2021 at 4:56 AM Zhansaya Bagdauletkyzy wrote: > > Add check_ksm_zero_page_merge() function to test that empty pages are > being handled properly. For this, several zero pages are allocated and > merged using madvise. If use_zero_pages is enabled, the pages must be > shared with the special kernel zero pages; otherwise, they are merged > as usual duplicate pages. The test is run as follows: ./ksm_tests -Z > > Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin