From patchwork Thu Sep 1 22:17:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 12963382 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 F2A9FECAAD2 for ; Thu, 1 Sep 2022 22:18:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233034AbiIAWSu (ORCPT ); Thu, 1 Sep 2022 18:18:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234937AbiIAWSm (ORCPT ); Thu, 1 Sep 2022 18:18:42 -0400 Received: from mail-qt1-x836.google.com (mail-qt1-x836.google.com [IPv6:2607:f8b0:4864:20::836]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 088766A480 for ; Thu, 1 Sep 2022 15:18:11 -0700 (PDT) Received: by mail-qt1-x836.google.com with SMTP id x5so219571qtv.9 for ; Thu, 01 Sep 2022 15:18:10 -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=uvMol3uyneGva4YyiwYlT7IjMY9wNfnMaY4BpajVnC0=; b=vB0TPhC+ETNKaorpvy0zXtEQMbIqrE0wkU/h5SP9iHJyWzeG/Kp/jpHxx6dt746Npa QOHvSTUY4nY6DTxMILIli4C/sMT/xiS5q23jK7GsK9NDcZWBJDyMJp2HL8fP0VFkqEZF VvTw7as9Jv9mHmLJUawLZKjNlgVaU2bZ1YoPg= 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=uvMol3uyneGva4YyiwYlT7IjMY9wNfnMaY4BpajVnC0=; b=WcxjkjfmpZtim2AxM++DlupfUMcMwdXJjcZjjxgmnWLsylJT8G6S0LOdpra8Z20Xj6 l2o1lp2CaexceR/8eNoBiZ35bDBRg/FMfpQAFd76QwMxYpIrlXIsdjjYYh+tfM+vnWhI 2L1OiL8FWn9aWxyoEAUclWQYLJaog8NxE0dy5/OxfV8CHZOaYLpUdwSvEyYwfznuV8hS iNnPfc6daYM4VfzOE6bGcEo8wsuRs/fKrK4acUzq1VytCO4ccE2Dtq0y6p3L+JKA5V7g s6iFptzAmp29vGNVJmT5HvCgO0Tiqc+zCC9FQiwx5UY6AD9eU6XISNAj6BDCFW7/mo0e 5boA== X-Gm-Message-State: ACgBeo10CsSiwsun/I7EUY83unE5LcPfGPw/I4dKGiiyGqceHxn2ZjIW BCYI22HoB44iBN3qK3xMVu3FwVT3MQVuDg== X-Google-Smtp-Source: AA6agR7IUlccHMDPHEeKk4mHGnWwUpV/eTK+kjnIV8R3LGYG/QjIQq6jZqPANDerA0E/GIkXT0vkdA== X-Received: by 2002:ac8:58c8:0:b0:344:87c2:c495 with SMTP id u8-20020ac858c8000000b0034487c2c495mr25705752qta.631.1662070689867; Thu, 01 Sep 2022 15:18:09 -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.83.2022.09.01.15.18.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Sep 2022 15:18:09 -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 17/18] i915: Move call_rcu() to call_rcu_lazy() Date: Thu, 1 Sep 2022 22:17:19 +0000 Message-Id: <20220901221720.1105021-18-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 Precedence: bulk List-ID: X-Mailing-List: rcu@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) --- drivers/gpu/drm/i915/gem/i915_gem_object.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index ccec4055fde3..21d6f66fb394 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -343,7 +343,7 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915, __i915_gem_free_object(obj); /* But keep the pointer alive for RCU-protected lookups */ - call_rcu(&obj->rcu, __i915_gem_free_object_rcu); + call_rcu_lazy(&obj->rcu, __i915_gem_free_object_rcu); cond_resched(); } }