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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 EDC28C83007 for ; Tue, 28 Apr 2020 21:00:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA5832072A for ; Tue, 28 Apr 2020 21:00:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="p9Fr9GlC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726889AbgD1U7s (ORCPT ); Tue, 28 Apr 2020 16:59:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38740 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726842AbgD1U7n (ORCPT ); Tue, 28 Apr 2020 16:59:43 -0400 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA40DC03C1AC; Tue, 28 Apr 2020 13:59:42 -0700 (PDT) Received: by mail-lj1-x244.google.com with SMTP id g4so257333ljl.2; Tue, 28 Apr 2020 13:59:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WD1ujdDPaZr2tel/SdXaMCcHYNwfEhTtkcv7u+ya4TM=; b=p9Fr9GlCZWdBfVeNmGFGRectLCP0tawZJ6HOk4/26gkt2xbuGisjL5HWK8oxenMLc3 WK7CFb3ruKHCtZ7DW6Lp8Fpzt4GHk+CGxiYQtgWPSlUcZZhyrkXg+x7Q/f57QULeG4g7 KBX/5c90KxyqqsIIlo8SJO7E7uG+2zSYj8AOCV2Ylk8oubDLEsK3ADImk2flhGOFkXI+ 87KwKJ/zH2FkeTIOkSsL2VQzig4qfyW01BDbny+JHyYdb8TNIJn+W5fs5fV4eB76ibiO CcBQtvZ48ahRBPCdPeE5xo7HRSuwQn5iX+QgHsxVfkr1T4EZH49PkqEz1HmXrNUWClic bbZg== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=WD1ujdDPaZr2tel/SdXaMCcHYNwfEhTtkcv7u+ya4TM=; b=U0YdinzbDKzElZ38VcoPbNb194Duh3Cm1Xr5sfDhfl5xbJPmkiZg7FfrN41vJbHW4c Cd2WPK08+yWfn2QLerMhMuqLMPI9ZRqa1WWRUqyLIR3bFZTOeCaxpdSg0j7+q6mEG7+W Ni+u8xCCRMA18etwUGfipGzRXzYgk6795SSLJkEbITwx2UCaBR+bFRpY5KM+2Cz2PaWf pqieh4Wolbmg7WIY1rEoWCbmnOIBe11wMaWLnipUrc+AIkqEpv31qIPFoFPtBTTDume0 eAB0o9aiRMd5UCLpxQ4MSUY6eAffmKMrGB1JBbSm+Z08/ijmAjGZQkS6SihkiR/LaJ8c Oglg== X-Gm-Message-State: AGi0PuazzyZyUG1xh5UUAS7P3xLdAUmmnsVTOUwChm7/GADJ0sALJUgQ nJg/eLx4g1p3+12Oi4/utN3/B1DpMPejgw== X-Google-Smtp-Source: APiQypJNL/we3uS/PpZeWdXqJOcuZv4g219qgtqBw9a68MWbrzBMMmSnncu/axBnMngVJ8BcXOksZA== X-Received: by 2002:a2e:b057:: with SMTP id d23mr19244054ljl.157.1588107580807; Tue, 28 Apr 2020 13:59:40 -0700 (PDT) Received: from pc638.lan (h5ef52e31.seluork.dyn.perspektivbredband.net. [94.245.46.49]) by smtp.gmail.com with ESMTPSA id z21sm295483ljh.42.2020.04.28.13.59.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2020 13:59:40 -0700 (PDT) From: "Uladzislau Rezki (Sony)" To: LKML , linux-mm@kvack.org Cc: Andrew Morton , "Paul E . McKenney" , "Theodore Y . Ts'o" , Matthew Wilcox , Joel Fernandes , RCU , Uladzislau Rezki , Oleksiy Avramchenko Subject: [PATCH 10/24] rcu/tree: add rcutree.rcu_min_cached_objs description Date: Tue, 28 Apr 2020 22:58:49 +0200 Message-Id: <20200428205903.61704-11-urezki@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200428205903.61704-1-urezki@gmail.com> References: <20200428205903.61704-1-urezki@gmail.com> 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 Document the rcutree.rcu_min_cached_objs sysfs kernel parameter. Signed-off-by: Uladzislau Rezki (Sony) --- Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 828ff975fbc6..b2b7022374af 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3977,6 +3977,14 @@ latencies, which will choose a value aligned with the appropriate hardware boundaries. + rcutree.rcu_min_cached_objs= [KNL] + Minimum number of objects which are cached and + maintained per one CPU. Object size is equal + to PAGE_SIZE. The cache allows to reduce the + pressure to page allocator, also it makes the + whole algorithm to behave better in low memory + condition. + rcutree.jiffies_till_first_fqs= [KNL] Set delay from grace-period initialization to first attempt to force quiescent states. -- 2.20.1