Received: by 2002:a05:6358:9144:b0:117:f937:c515 with SMTP id r4csp5767946rwr; Tue, 9 May 2023 06:11:35 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ6Au6/SSVBCJGAsB9va01ndZrF5hIEQ7zhHToC1FBJFAGSJeNgSxPC2AN8ib3wijFatxOtY X-Received: by 2002:a17:902:bb8c:b0:1a6:ef75:3c53 with SMTP id m12-20020a170902bb8c00b001a6ef753c53mr12536040pls.11.1683637895413; Tue, 09 May 2023 06:11:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683637895; cv=none; d=google.com; s=arc-20160816; b=R749JV9HNkqcZsaBvol19XDf38DD3pZDJ+NfYwduWYjDipVMvvZHJ6PUiNa/faOM8E InRhu55AV4cCQTA9SHyfgvuU316c5Obxv7WXnBvGJqYHMvUMO7XzY5FN5l/yCRZcN57y VhfQbIALD/fc5yPahhJrHQP49aAo6JIuIpKngJV7j5dMHdeSlTisI/5rlaVXBRfjpuG1 PmGS42A3x5U6JfYTludiT22URq5pH3cHqmuJghUhKf2U9uFWwEVZ6crhauRzX6urmWUc w7eT4AVRoeVrsq+AVwYFU3smv9VKbaLNiGfJmB/U3ufxsYWC/9EC7BFTJxu6kHuhn2Ix qZLA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:references :in-reply-to:subject:cc:to:dkim-signature:dkim-signature:from; bh=66CwgAKwlAwu0o+HSirJnximEw9Bjlm23mz/HWPXU1s=; b=qMUUPSFNgIVNas6z4XqlrZO2sNkbz1MDCGQCwSRCkJdeG/NjdNL57t+0HRtgWX93dr Som6sO6k20h5QkFqIRzrZEw5nd+ZLqjMi9M8lGFZLSSK0JIvz4NLADezoFsj5G3lPuhk OBSj7Fsv+TMbVvhD+oySTh+V82PXjGk1pQpL/wZ84HG2G/rQV+RMiimO990Fpv8GquY/ 0G81ttusSfObNe56iBKyE7pFziNtrXoeSVh2NPYEB/mLVroLQCqNKtiqByO0ya2GJnsO EYgWoo9aW18DI1v9Q7kCULguml7UrAcB1iJVusb8JV1pk+qCXW9HrJCK4YmvlSX3HQMX GdQQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=hbxyUDBn; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e header.b=rrH6jhUO; 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 Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id p5-20020a170902e74500b001aad4ba0de5si1557379plf.158.2023.05.09.06.11.21; Tue, 09 May 2023 06:11:35 -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=hbxyUDBn; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e header.b=rrH6jhUO; 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 S235137AbjEINFy (ORCPT + 99 others); Tue, 9 May 2023 09:05:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233120AbjEINFw (ORCPT ); Tue, 9 May 2023 09:05:52 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A77B310F6; Tue, 9 May 2023 06:05:51 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683637550; 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=66CwgAKwlAwu0o+HSirJnximEw9Bjlm23mz/HWPXU1s=; b=hbxyUDBnvdDjCwEe2fKEwFmkPPF3xy/eLmej2wKSXWr0d9f7bb+QqZDpCdayQQQuLelVkk TBajaFgXIRDO/ZagO/eatcnJ1gv/rjzhEDcs0VzmdsJ6YgoRM4296eoJYO7YsDmsXx9LuR Vzv/C/PAuDiXr/eriryMsopQnD1Jl6wbF6dd3jY2eGg7b1vqKV7US33B3IWgxbQruXg9cg FDP77qfEu0rsvW0T6gNk5AgPFmtZ9Z/i84jmz57RQnVO7Y6qgf49rjv3CnkyKDZWKNGmr2 hu8dgyS3LbSNbPk0ZZbojg5UckR7EHhnzl3agppxpE88rRnekkpV/3voJ3aeOQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683637550; 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=66CwgAKwlAwu0o+HSirJnximEw9Bjlm23mz/HWPXU1s=; b=rrH6jhUO5K6/+9ljImq/xGhfEnagn6yN0AbNdNjZ4urlUv98qTkpEpavwlAhkSMUwyWfNs C3Dq88rRNZXyxcAw== To: Jason Xing , paulmck@kernel.org, peterz@infradead.org, bigeasy@linutronix.de, frederic@kernel.org Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kerneljasonxing@gmail.com, Jason Xing Subject: Re: [PATCH] softirq: let the userside tune the SOFTIRQ_NOW_MASK with sysctl In-Reply-To: <20230410023041.49857-1-kerneljasonxing@gmail.com> References: <20230410023041.49857-1-kerneljasonxing@gmail.com> Date: Tue, 09 May 2023 15:05:50 +0200 Message-ID: <87y1lxzmc1.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain 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 Mon, Apr 10 2023 at 10:30, Jason Xing wrote: > From: Jason Xing > > Currently we have two exceptions which could avoid ksoftirqd when > invoking softirqs: HI_SOFTIRQ and TASKLET_SOFTIRQ. They were introduced > in the commit 3c53776e29f8 ("Mark HI and TASKLET softirq synchronous") > which says if we don't mask them, it will cause excessive latencies in > some cases. As we are ripping this out, I'll ignore this patch.