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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i186-20020a6387c3000000b0051b59786e6csi1790080pge.300.2023.05.09.08.30.29; Tue, 09 May 2023 08:30:46 -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=@linutronix.de header.s=2020 header.b=XDQ+dwnb; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; 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; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235793AbjEIPTi (ORCPT + 99 others); Tue, 9 May 2023 11:19:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229477AbjEIPTh (ORCPT ); Tue, 9 May 2023 11:19:37 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87C5B40DB; Tue, 9 May 2023 08:19:36 -0700 (PDT) Date: Tue, 9 May 2023 17:19:32 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683645574; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UqejwA2SlPIA1S+P2yVF0lec7SSacjZYHG6Osl3fEK0=; b=XDQ+dwnbV7nZxmUwjIXs5pTmoLevO7PaY+Q4jZPMB/dTmmCx6S8z1itFDv36Od3MUAQit4 53k6ygQanN4A6V7eJHaGS0fOuusfNV4+KhzWXN+x7etFfCgRv6hx/gAwmRoJrFMAvbUJbu vYj4lBPfrq1dB8/9qh4G+ExHqoRiA8SLvZ3K+Qnxdo6Eb9bbaXE/2qyrudSK+nYJq4Cf3G 23ds3uIqGvXF5OnX4dtnYq1E10vbXtcBrfclDnxXcz1EaUl/L0s5OV3KAEFQPnhwT04vbj i2bvHMPrimru0nmNNYOUkfNYBajbhokBJ7t31qm1V/RBryQwTokyDGEPKe0n0w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683645574; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=UqejwA2SlPIA1S+P2yVF0lec7SSacjZYHG6Osl3fEK0=; b=HnwHBvm6HDawxNscWo2HIqrtPYCczNWcpuTexLzQbvJ7eRXpmnEwVRB+6KDwzfZnjl52OQ BZHo3Kcvx2voF3CA== From: Sebastian Andrzej Siewior To: Paolo Abeni Cc: linux-kernel@vger.kernel.org, "Paul E. McKenney" , Thomas Gleixner , peterz@infradead.org, netdev@vger.kernel.org, Jakub Kicinski , Jason Xing , Eric Dumazet Subject: Re: [PATCH] revert: "softirq: Let ksoftirqd do its job" Message-ID: <20230509151932.0YIQkuy6@linutronix.de> References: <57e66b364f1b6f09c9bc0316742c3b14f4ce83bd.1683526542.git.pabeni@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <57e66b364f1b6f09c9bc0316742c3b14f4ce83bd.1683526542.git.pabeni@redhat.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_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED 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 2023-05-08 08:17:44 [+0200], Paolo Abeni wrote: > Due to the mentioned commit, when the ksoftirqd processes take charge > of softirq processing, the system can experience high latencies. Yes. RT wise I tried a lot to keep ksoftirqd from getting scheduled. With this change, it makes the life a lot easier. Reviewed-by: Sebastian Andrzej Siewior Sebastian