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[2620:137:e000::1:20]) by mx.google.com with ESMTP id y2-20020a50eb02000000b00453688643fasi2330895edp.260.2022.09.21.08.06.09; Wed, 21 Sep 2022 08:06:46 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=desiato.20200630 header.b=XrLeRhY5; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230077AbiIUPBq (ORCPT + 99 others); Wed, 21 Sep 2022 11:01:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229976AbiIUPBi (ORCPT ); Wed, 21 Sep 2022 11:01:38 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED684CE32; Wed, 21 Sep 2022 08:01:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ZgLg+iakMwAKwuSgDkBgwsil74YzMrT0fyk7bQYAOaQ=; b=XrLeRhY5JtnJeibn5eLYKGs/k/ kaDfxLHdPX29zp0ITprBqKREL4QTASMn/eztBwMmgH3pJrLLHaTTg5veLBCdAB/Lzv0U3v3nLgxfZ Mdru50MXu7B0BShJdbdJ6c6PKgJAynmhiktQVKO/+49RQZFiAZE3ZCI6gMckzvTty/ny6FYGQvKGG f7xNUKvRi8OtAZYugKWykDuQrrXc0obnnX2m02tTbx+rMxujO1jN8do4wGhS5qlNOPyOaQGV+458+ Hm79BtCllUhozaE4sE6I10vAX7EJyyvnzGpUxGKNirxuO8VxjoXtMcvTN0SlPW+rc+w8Hh6KIHOBl 3ntoLTUg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1ob1DK-00EhIH-98; Wed, 21 Sep 2022 15:00:38 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E6CF6300202; Wed, 21 Sep 2022 17:00:35 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id C70682BB5A386; Wed, 21 Sep 2022 17:00:35 +0200 (CEST) Date: Wed, 21 Sep 2022 17:00:35 +0200 From: Peter Zijlstra To: K Prateek Nayak Cc: linux-kernel@vger.kernel.org, rafael@kernel.org, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, dave.hansen@linux.intel.com, bp@alien8.de, tglx@linutronix.de, andi@lisas.de, puwen@hygon.cn, mario.limonciello@amd.com, rui.zhang@intel.com, gpiccoli@igalia.com, daniel.lezcano@linaro.org, ananth.narayan@amd.com, gautham.shenoy@amd.com, Calvin Ong , stable@vger.kernel.org, regressions@lists.linux.dev Subject: Re: [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture Message-ID: References: <20220921063638.2489-1-kprateek.nayak@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220921063638.2489-1-kprateek.nayak@amd.com> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 21, 2022 at 12:06:38PM +0530, K Prateek Nayak wrote: > Processors based on the Zen microarchitecture support IOPORT based deeper > C-states. I've just gotta ask; why the heck are you using IO port based idle states in 2022 ?!?! You have have MWAIT, right?