From patchwork Tue Apr 28 20:58:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Uladzislau Rezki X-Patchwork-Id: 11515573 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9A7B14DD for ; Tue, 28 Apr 2020 20:59:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 97C3520737 for ; Tue, 28 Apr 2020 20:59:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="p9Fr9GlC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97C3520737 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id F32828E000F; Tue, 28 Apr 2020 16:59:42 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E43248E0007; Tue, 28 Apr 2020 16:59:42 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CBAD88E000F; Tue, 28 Apr 2020 16:59:42 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0238.hostedemail.com [216.40.44.238]) by kanga.kvack.org (Postfix) with ESMTP id B0C7D8E0007 for ; Tue, 28 Apr 2020 16:59:42 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 79CF4824805A for ; Tue, 28 Apr 2020 20:59:42 +0000 (UTC) X-FDA: 76758480204.30.event61_54b7d1c667d46 X-Spam-Summary: 2,0,0,1ef52ac6088e2f62,d41d8cd98f00b204,urezki@gmail.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:2693:3138:3139:3140:3141:3142:3352:3865:3866:3867:3868:3870:3871:3872:4321:5007:6119:6261:6653:7514:8603:9413:10004:11026:11232:11658:11914:12043:12114:12296:12297:12438:12517:12519:12555:12895:13069:13200:13229:13311:13357:13894:14181:14384:14394:14687:14721:21080:21444:21451:21627:21666:21990:30034:30045:30054,0,RBL:209.85.208.193:@gmail.com:.lbl8.mailshell.net-62.18.0.100 66.100.201.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: event61_54b7d1c667d46 X-Filterd-Recvd-Size: 4291 Received: from mail-lj1-f193.google.com (mail-lj1-f193.google.com [209.85.208.193]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Tue, 28 Apr 2020 20:59:42 +0000 (UTC) Received: by mail-lj1-f193.google.com with SMTP id y4so216501ljn.7 for ; Tue, 28 Apr 2020 13:59:41 -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=Mru9VUEwUO/3vSKSXArJd0WkWKbXap51Tc+PbzX/mdJ5sM9RnEpkOPssm41Dm7F/Kk OxnSK04zJZ/tMHy7WT2ywjRguI+ikmBtNYm7hhhW0dVYGPHN9cyijJUtrcIJshWwDX7w gTi8Ulr4t0p8W/IsIwcOmFQC0DzFegABl0yVFp7jClAJ6oKMw2xw1YEIukTUksnuQDH5 MQJ/4YYJF/1xHw45QxREJH392dpEyqwtekbeaKSblKder6v9BfyqLcmiUJI51GcAkMIY DioWJH4g7esO5oLP3ThDu+6Wl+AwK89qRv2E1reUzBysRC1V57IWVettzD00ZuxcQqWP LyAw== X-Gm-Message-State: AGi0PuaJoRespm3a5C5QHJokoJBSFhIwBz6bllJlrPu6nxfxqzSen2W1 FjMqpMO2c1Xz4mrPTuyVlbg= 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 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: 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.