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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B665ECAAD3 for ; Thu, 1 Sep 2022 22:19:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234560AbiIAWTQ (ORCPT ); Thu, 1 Sep 2022 18:19:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234707AbiIAWSK (ORCPT ); Thu, 1 Sep 2022 18:18:10 -0400 Received: from mail-qt1-x82b.google.com (mail-qt1-x82b.google.com [IPv6:2607:f8b0:4864:20::82b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BDC8E5AC74 for ; Thu, 1 Sep 2022 15:18:06 -0700 (PDT) Received: by mail-qt1-x82b.google.com with SMTP id h21so243254qta.3 for ; Thu, 01 Sep 2022 15:18:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=TrK5dOUuJ472Va/MQxlZM4Ul27mMRNSxArIaJwpPfZg=; b=TUcC0u4QM5Ny9KLvPnrxQITVTokuBxEATE/WsQfbGYFGD9PpxIg9MJCiMdUCQf7Laq X6rikyqdDpvNk6vlDW0YVq5/0S8OJYELbrNlakftwrW0WN0AsYlxa096qY1FJJBELlxI jL2uVxkUi+pIbxFoV4OaGYaWTNiex9ahiveZ0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=TrK5dOUuJ472Va/MQxlZM4Ul27mMRNSxArIaJwpPfZg=; b=B99T5Fl/DOrjsYWPiMhiItZeY72mgk5+OsEVmEF2WqUDntPIim4pt9T2BVUsSBmlma iFKCagbFNObWAgWqmi9tw4lzhRRL4Ca5h9AOJag1ciDlfxnHweZi1naNO7jnTfO/19dL 3crFzGZURie3+muTKmYXuks2rEUb65mXK4SCQNSmrOyVG4b/H1FOZsQU/cIbWCIUDgbP 1otpRcAqfQMFe8g2bR0K6I/h1U97mSc5QEuVulFQaaLquKibY3Ob46aDgV+QRmsyhTyE SaT8R+YeZnkugerfR2y/E+m7niviq23nKlycYNsaj4JbRY5UKC7gBSDTBf9FdRt09eSz M7Ug== X-Gm-Message-State: ACgBeo3D3UP5MVbG+cqlT0/xt4dotyhG2t1RKYlqI8CJxNoTKrtFgurT mlY50zpOYJtz9X5qrL9hQngARQ== X-Google-Smtp-Source: AA6agR4uiuD53PR2JnbYvQYDsN+ofsO7SW63BGOkp2t0qORapVEs6g6ATsIcI2VvrBk+/fuLb48KeQ== X-Received: by 2002:a05:622a:53:b0:344:6f46:9b16 with SMTP id y19-20020a05622a005300b003446f469b16mr26319627qtw.664.1662070685785; Thu, 01 Sep 2022 15:18:05 -0700 (PDT) Received: from joelboxx.c.googlers.com.com (228.221.150.34.bc.googleusercontent.com. [34.150.221.228]) by smtp.gmail.com with ESMTPSA id s16-20020ac85290000000b0034305a91aaesm11060794qtn.83.2022.09.01.15.18.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Sep 2022 15:18:05 -0700 (PDT) From: "Joel Fernandes (Google)" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, rushikesh.s.kadam@intel.com, urezki@gmail.com, neeraj.iitr10@gmail.com, frederic@kernel.org, paulmck@kernel.org, rostedt@goodmis.org, vineeth@bitbyteword.org, boqun.feng@gmail.com, "Joel Fernandes (Google)" Subject: [PATCH v5 12/18] cred: Move call_rcu() to call_rcu_lazy() Date: Thu, 1 Sep 2022 22:17:14 +0000 Message-Id: <20220901221720.1105021-13-joel@joelfernandes.org> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog In-Reply-To: <20220901221720.1105021-1-joel@joelfernandes.org> References: <20220901221720.1105021-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is required to prevent callbacks triggering RCU machinery too quickly and too often, which adds more power to the system. Signed-off-by: Joel Fernandes (Google) --- kernel/cred.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/cred.c b/kernel/cred.c index e10c15f51c1f..c7cb2e3ac73a 100644 --- a/kernel/cred.c +++ b/kernel/cred.c @@ -150,7 +150,7 @@ void __put_cred(struct cred *cred) if (cred->non_rcu) put_cred_rcu(&cred->rcu); else - call_rcu(&cred->rcu, put_cred_rcu); + call_rcu_lazy(&cred->rcu, put_cred_rcu); } EXPORT_SYMBOL(__put_cred); -- 2.37.2.789.g6183377224-goog