From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 906552820CE for ; Tue, 19 Aug 2025 15:01:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755615670; cv=none; b=RV7Xr2gxr6DtUTURhrThCyi7Wr3gOKfvbKIzdAU6ZTeBDebROdB4nOs9t+4Hp9WXL3IbeSqNlZtmWrHbbXqXLPZOfKbdV9unjE4lCy/oM332VIufkcNgDbjdCPcfIyKCzMicJ3/hjMt8EQUf7MxackPxcX+xnzmSEycUMqpivsY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755615670; c=relaxed/simple; bh=jGEY3EnOBXun4SQ0ll/o32z1qo0qZY8iGqdHqyf5ANY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RrfunUcnwEWcBMkpdOSnJA13WNFuQEMDv+tzAaimWV/9aKkXZcPVjnOVU7tlBbtBKy7EtX5Un8kb3+lHvtBmiGdddhOJAve05//iwfRCsTcQOXMRZuCiXbX5YMx7s1NKL1w+FPSEAgxUJteGBD+eisBj+Z6KOFJnHg3PHeudi8k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=kzapx1AA; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=RhmkHGfQ; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="kzapx1AA"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="RhmkHGfQ" Date: Tue, 19 Aug 2025 17:01:05 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1755615666; 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=7hYf3QFb0JiRzAbtPuQzxzkHoV2M9phfTa2ZdhDggos=; b=kzapx1AAcR/HPJ39aWX+tVOWN6MnRU0okwgYpB21DR6ZE9pZORJX/aiCWQrvv4VhCzVp0c 3wbDbXBpUw6Nj/OcMHieNLshKeiaUV2F17tgJVdO4RoC9vce/OU+0bOMo/Z5t6XLx8BUTQ J0mnP/7PIeLrOxRjmnnsJv9FcHQ8g7pkFa+8+2hGuX8+D4ZHAuYYomfsKyzxac1RDqX9t9 bfMarcltQ3kIlkC+miaJdHR+ji2UAG3YX4MBrDB2bA/VVIqgo6kfJk7tF5yI6Pg+mCmuU3 Hvb+Mmg5XgE4YrI7WfdQaYdSzG5jPa4jlK5IM3jMWbLnW+KaorYsazSYpgG+hA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1755615666; 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=7hYf3QFb0JiRzAbtPuQzxzkHoV2M9phfTa2ZdhDggos=; b=RhmkHGfQPxVDamkMwkJHH0HrCo+psPt8q1j0uMKOI1dI9VD8Zd4Q/nIw7QkPv33s6jb1f5 yoCt6ux+PFvZ6oDg== From: Sebastian Andrzej Siewior To: Tejun Heo Cc: linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, Lai Jiangshan , Ingo Molnar , Peter Zijlstra , Steven Rostedt , Thomas Gleixner Subject: Re: [PATCH] softirq: Provide a handshake for canceling tasklets via polling on PREEMPT_RT Message-ID: <20250819150105.DYeV89fa@linutronix.de> References: <20250812143930.22RBn5BW@linutronix.de> <20250812145359.QMcaYh9g@linutronix.de> <20250813063311.33m0TDKl@linutronix.de> <20250818125242.vJ4wGk20@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On 2025-08-18 07:41:06 [-1000], Tejun Heo wrote: > Hello, Hi Tejun, > I see. Can I backtrack? If it doesn't require too invasive changes, let's > just keep the two in sync. I'll get back to conversions so that we can > actually achieve the goal eventually and it'll probably be more confusing if > we revert that and try to redo it later. Okay. Then let me repost the tasklet patch and make one for workqueue to stay in sync. I do hope that we end up with a requirement that any kind of teardown does not happen from an atomic context ;) > Thanks. > Sebastian