From patchwork Mon Sep 27 23:24:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Changbin Du X-Patchwork-Id: 12521209 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3596C433F5 for ; Mon, 27 Sep 2021 23:24:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6390D611BD for ; Mon, 27 Sep 2021 23:24:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6390D611BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 0327E900004; Mon, 27 Sep 2021 19:24:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F23F7900002; Mon, 27 Sep 2021 19:24:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E1389900004; Mon, 27 Sep 2021 19:24:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0044.hostedemail.com [216.40.44.44]) by kanga.kvack.org (Postfix) with ESMTP id D40D8900002 for ; Mon, 27 Sep 2021 19:24:38 -0400 (EDT) Received: from smtpin36.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 97D7531EC1 for ; Mon, 27 Sep 2021 23:24:38 +0000 (UTC) X-FDA: 78634935036.36.8CE9272 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) by imf18.hostedemail.com (Postfix) with ESMTP id 60EB9400208A for ; Mon, 27 Sep 2021 23:24:38 +0000 (UTC) Received: by mail-pg1-f173.google.com with SMTP id h3so19246769pgb.7 for ; Mon, 27 Sep 2021 16:24:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ly15VAemQnFv0oKVr/z7Q4soqSYUoye194ZW1HbvAvA=; b=IJ2s3pVRMmEGE3ltGp+WGmpMZngRiTKSlJJr/tNBtgDtT1Ko2KcQpIFDSlj/C7aVAQ JYEoZoRvdKH0zpC29MFiHm67rVnIvcKSIJiva2/w41ZJ1fLxQ3bzIFQQzU72p2G5NT7p 12GSgz8Vo1fJBw8g/xtwFH9jBGSBq7Mj4Z/ImHKQ1/+Wz814ry0UXEtfejS+JIa66kU+ 8ZWSYhhHWwmqMAR9Lzy/k6aPfVHdO76GHyr3vZ2aXLuyQzgB97+dhS9CtFGmDBWGKhbn hvKTG1xm1JgoxprPaq04wjgc7RTO1hCHF+Xft36Y8Jdq1lrdZKoiQ7te1pDWJFv+zZMF uzkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ly15VAemQnFv0oKVr/z7Q4soqSYUoye194ZW1HbvAvA=; b=N+UxTkQHgC6n9028pZKNXKA6JexJo5S4KKq+LJDfRr8uV05r5Sa+4pGopHHgyMTUuy kvvikxEAYPE2HmDAORY0Rx5dm1WLzoFsgB+fkG1D3Gj2OBeFvXfLovnw5Z42QwvTcZya 1+4gb3WgVVWXn+LxvBtWXgpy8IcZjjBLqNwx2lyajCvSqQx3oMDUNqJri9GBfrqupX+7 VIrH5mXgzz92cOw9zNUNGtvFtITUC1igjPkoNzUaNbQFGbDin3lCTsDueWkV/E4gEgd/ R32w78lc2k4lq2z7S56+BxBKSpx/UfkRSeegkw0VhKAL/9kPhZK4sIXjMjK+va+XxX+v 0OQA== X-Gm-Message-State: AOAM533+ZGAnfUybVv6WDGezSfatdN0/D4fzn6QWIN2Pt91wHuLzZL4S qccHw9DkWXFyP7V4cRmdUXpave5uOdk= X-Google-Smtp-Source: ABdhPJyiSUOxQu0y3+oGMO4aOI3uwpQXfkfagXvCDGF+s29Fm2JVk+EuRHuAeab1ckQcPa58mQ1c1g== X-Received: by 2002:aa7:9e49:0:b0:44b:2a06:715e with SMTP id z9-20020aa79e49000000b0044b2a06715emr2564611pfq.78.1632785077495; Mon, 27 Sep 2021 16:24:37 -0700 (PDT) Received: from vultr.guest ([141.164.41.4]) by smtp.gmail.com with ESMTPSA id q18sm18088353pfh.170.2021.09.27.16.24.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Sep 2021 16:24:37 -0700 (PDT) From: Changbin Du To: Andrew Morton , SeongJae Park Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Changbin Du Subject: [PATCH] mm/damon: needn't hold kdamond_lock to print pid of kdamond Date: Tue, 28 Sep 2021 07:24:32 +0800 Message-Id: <20210927232432.17750-1-changbin.du@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 60EB9400208A X-Stat-Signature: jryits53ae4gmcyu7itunq57jauisw4q Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=IJ2s3pVR; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf18.hostedemail.com: domain of changbin.du@gmail.com designates 209.85.215.173 as permitted sender) smtp.mailfrom=changbin.du@gmail.com X-HE-Tag: 1632785078-762782 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000421, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Just get the pid by 'current->pid'. Meanwhile, to be symmetrical make the 'starts' and 'finishes' logs both info level. Signed-off-by: Changbin Du --- mm/damon/core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index bc5f74348649..3ef3e2bb091e 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -652,9 +652,7 @@ static int kdamond_fn(void *data) unsigned int max_nr_accesses = 0; unsigned long sz_limit = 0; - mutex_lock(&ctx->kdamond_lock); - pr_info("kdamond (%d) starts\n", ctx->kdamond->pid); - mutex_unlock(&ctx->kdamond_lock); + pr_info("kdamond (%d) starts\n", current->pid); if (ctx->primitive.init) ctx->primitive.init(ctx); @@ -705,7 +703,7 @@ static int kdamond_fn(void *data) if (ctx->primitive.cleanup) ctx->primitive.cleanup(ctx); - pr_debug("kdamond (%d) finishes\n", ctx->kdamond->pid); + pr_info("kdamond (%d) finishes\n", current->pid); mutex_lock(&ctx->kdamond_lock); ctx->kdamond = NULL; mutex_unlock(&ctx->kdamond_lock);