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 A007CC432BE for ; Wed, 4 Aug 2021 01:58:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 850CF60E78 for ; Wed, 4 Aug 2021 01:58:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233811AbhHDB6w (ORCPT ); Tue, 3 Aug 2021 21:58:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229733AbhHDB6u (ORCPT ); Tue, 3 Aug 2021 21:58:50 -0400 Received: from mail-ej1-x62a.google.com (mail-ej1-x62a.google.com [IPv6:2a00:1450:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3EC3C06175F for ; Tue, 3 Aug 2021 18:58:37 -0700 (PDT) Received: by mail-ej1-x62a.google.com with SMTP id u3so1409487ejz.1 for ; Tue, 03 Aug 2021 18:58:37 -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=Ik/aRIJnGF3BUxWdSYGMICWQOswUuEj2isGKQOk90Bc=; b=gbrIZDmSoqXU6IDsTYkf/KNp4sxEyt9n0JuBLXR4M+OQtbi6PO6/p5Jnabp3EgxaJd bc7GBDZviL+k0aVQ1+BjauRfFralpG13Y0UrqKmcsQLssFA3Bt56JjsTxcLY07z4fsE4 0X8KVKQLiC1G7+i4LKomSEthomV5aEzZWq/9eXniewGLpKyqBAslfb45b6OnFkGGKFnW fjTQPFlxroF8tmwH/dHrhrVMRR2gyyCfgQ7w/tFTGEucUEVAiwTjaZ9b/k7qvBfEFs5A aJdXt9Py38xBkkXUKHIesIsuEoPRtU4vchx2c5Xew0LwGTbT+btlCIZFnlTI90PgamYL hlCQ== 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=Ik/aRIJnGF3BUxWdSYGMICWQOswUuEj2isGKQOk90Bc=; b=XYEIWw25M5JkjK9Y9XY8vuw5bcJsHaqQN0mowA44OElvfrNlKUphABhpOF/gSims9P Rw/RnOsOr/bBASqdoTBEVcHKrrZ4WQvYKeHeJOaFiq3/6ecDz0+tUQBNU/QFYq80YP1C 1p4FmsAZ+BAVm6YRtn8A/754kpDWLZDPZkFPqE4t+o9+HJLiFTfUaqOBzUo0QapLQ5K+ Qk7fGX7vkrC5du0qD47BOE+vaAxxXO2NeU1bPvMxn90DQgv4XOH6Y57ZBSDRv5H7QAqZ wvbnyZv77cVJES2Z1jBJYB9JuCOJwwsL8gxS2V6cTWX5csK9MClbP/3f8Wp+1QzOknDx QwaQ== X-Gm-Message-State: AOAM531/+kP2C3n4cOPBg6K545a0RCmivOoeQRTZjBPDRoFmeQzseC56 MQA2WkKrPvgC4T+0mpPlURkL6/I6/d1KkGh7lumcTQ== X-Google-Smtp-Source: ABdhPJzQAbg7ZiA7bYIZFGzoMIu4mWe0c4ITjnZ2a/lgbpe+gCh44StvMSOnBW+Q79sfkZh+BjVmKtJB5iVXqnl3vAQ= X-Received: by 2002:a17:906:d7b2:: with SMTP id pk18mr23582718ejb.541.1628042316601; Tue, 03 Aug 2021 18:58:36 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Pavel Tatashin Date: Tue, 3 Aug 2021 21:58:00 -0400 Message-ID: Subject: Re: [PATCH v2 2/4] selftests: vm: add KSM unmerge 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_unmerge() function to verify that KSM is properly > unmerging shared pages. For this, two duplicate pages are merged first > and then their contents are modified. Since they are not identical > anymore, the pages must be unmerged and the number of merged pages has > to be 0. The test is run as follows: ./ksm_tests -U > > 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=ham 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 D25B0C4338F for ; Wed, 4 Aug 2021 01:58:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 31F2E60295 for ; Wed, 4 Aug 2021 01:58:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 31F2E60295 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 B44A08D0017; Tue, 3 Aug 2021 21:58:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AF5048D000F; Tue, 3 Aug 2021 21:58:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9E3328D0017; Tue, 3 Aug 2021 21:58:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0098.hostedemail.com [216.40.44.98]) by kanga.kvack.org (Postfix) with ESMTP id 815328D000F for ; Tue, 3 Aug 2021 21:58:38 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 29E37243AC for ; Wed, 4 Aug 2021 01:58:38 +0000 (UTC) X-FDA: 78435739116.14.15029F4 Received: from mail-ej1-f41.google.com (mail-ej1-f41.google.com [209.85.218.41]) by imf18.hostedemail.com (Postfix) with ESMTP id CAFC3400A5B1 for ; Wed, 4 Aug 2021 01:58:37 +0000 (UTC) Received: by mail-ej1-f41.google.com with SMTP id oz16so1362340ejc.7 for ; Tue, 03 Aug 2021 18:58:37 -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=Ik/aRIJnGF3BUxWdSYGMICWQOswUuEj2isGKQOk90Bc=; b=gbrIZDmSoqXU6IDsTYkf/KNp4sxEyt9n0JuBLXR4M+OQtbi6PO6/p5Jnabp3EgxaJd bc7GBDZviL+k0aVQ1+BjauRfFralpG13Y0UrqKmcsQLssFA3Bt56JjsTxcLY07z4fsE4 0X8KVKQLiC1G7+i4LKomSEthomV5aEzZWq/9eXniewGLpKyqBAslfb45b6OnFkGGKFnW fjTQPFlxroF8tmwH/dHrhrVMRR2gyyCfgQ7w/tFTGEucUEVAiwTjaZ9b/k7qvBfEFs5A aJdXt9Py38xBkkXUKHIesIsuEoPRtU4vchx2c5Xew0LwGTbT+btlCIZFnlTI90PgamYL hlCQ== 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=Ik/aRIJnGF3BUxWdSYGMICWQOswUuEj2isGKQOk90Bc=; b=tzQRJ2CLe43FUkkN2MYfYV6c31aNnzkWbBdsBbvTXbh5zpVr+4dC+YfdOjr6LKAHbr NynXbm2bs6I/3Jyq4ut9aKqXR2mX2yxuSPa0tZq4r3WqMKF+zMM5S9XI5Plhg8iD+1qi W7EHQy5QDd9XiUlGYvj+pYyMm4TWF68gcmxEI41WaE7/W/POwf09da3lDGRIytdjrRnK drkqMXPXPR4X7njwJvH96zAGKimFa5rMdlcAO3vEY72B9ZIArFOONQllz6qEzD/3H7fu 23Wca1XRNnhS1MyUk97PS5kjRehtFBalJXKJBIJo06Co5IdDgMr6bnln+lVt/V8xzPrN 97Qw== X-Gm-Message-State: AOAM5315jNTczxr3E1pQdak+D7M7hNqUnuJHKi0BQJTzTWn93PhcMj+9 US2Tfi/5gpR8IuGw6fXL83XK+fJaWWnh/rV9ZNklCg== X-Google-Smtp-Source: ABdhPJzQAbg7ZiA7bYIZFGzoMIu4mWe0c4ITjnZ2a/lgbpe+gCh44StvMSOnBW+Q79sfkZh+BjVmKtJB5iVXqnl3vAQ= X-Received: by 2002:a17:906:d7b2:: with SMTP id pk18mr23582718ejb.541.1628042316601; Tue, 03 Aug 2021 18:58:36 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Pavel Tatashin Date: Tue, 3 Aug 2021 21:58:00 -0400 Message-ID: Subject: Re: [PATCH v2 2/4] selftests: vm: add KSM unmerge 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: rspam06 X-Rspamd-Queue-Id: CAFC3400A5B1 Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=soleen.com header.s=google header.b=gbrIZDmS; dmarc=none; spf=pass (imf18.hostedemail.com: domain of pasha.tatashin@soleen.com designates 209.85.218.41 as permitted sender) smtp.mailfrom=pasha.tatashin@soleen.com X-Stat-Signature: meu3rdas3qkhq9o5hr9n8idwrrpi5pww X-HE-Tag: 1628042317-646784 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_unmerge() function to verify that KSM is properly > unmerging shared pages. For this, two duplicate pages are merged first > and then their contents are modified. Since they are not identical > anymore, the pages must be unmerged and the number of merged pages has > to be 0. The test is run as follows: ./ksm_tests -U > > Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin