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 245A03AD514; Wed, 3 Jun 2026 10:20:23 +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=1780482028; cv=none; b=QH3xaG8FZqDJ1Y+l3ReHDT5grXV0HXy3MioNRUJHkWRNQGDyzf8pphVvp5yL36IMA1C5A+223bpTaqVAeoRNTVcF4imhpY54BRYa5lT0wCAyZ7W64raarkkr18T/JpB8YopKFs5gZV9lcWvB63OwxK1VOWwx1noDeTI5Jz3xom4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780482028; c=relaxed/simple; bh=QeViSA+jcgclwNWpv/VaM6OLK1ZiV3N7rKhMuiNuFt8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=r7AluaJ9NYRxfu2HuHEcNTbR6kTFbWDXcaFBdIJTLgV+/DHgo3aKEPQs7x/bmHOOybJMgpIgbTgdwqS6hqF4GugNb/V+hcxR3VcvpJKMx6e/2o3OtAHE3xZtH3Et4yxpsRSQ2WTbJ3ocT/Cza/A7i/hSWXt1lLjYYpEzdC9XaGU= 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=2Kpwc9lx; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=ht05hPE/; 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="2Kpwc9lx"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ht05hPE/" Date: Wed, 3 Jun 2026 12:20:20 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1780482022; 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=SERTPvwwtElEqMvhTi6cpxoekSnm9GBaMtAJHQpKnow=; b=2Kpwc9lxOjPFGH0MVEls5p0wzDVUzXhD5ZcH5BOmudg5ZzmJBenO83CaApa31GeCXiuE1V cHbE2Sd3iNMMo5PsL0ahDBa09bn7ZzBQbVjqisGWn7ZxZvdI5izt1A+HF1XWbbSyZfbplg M12ao6FLSaFSGjjAzUw4dsJFnND7bFdz1XPz+0AkG+rycluMbxXAGsXXOUJpztpCGohSuj 3S2voHD7H3JvAdZZjXvgeKcRDR5ib5RibDo5t/SIGTjECq9SMN1i5fN1khTNZdNBsTtx1t +xobRKYnKE4duxX6FOq1JWH4bNa1o/bFElk6WWH3bQ4suyhGbxgXIFcMA9tUJg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1780482022; 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=SERTPvwwtElEqMvhTi6cpxoekSnm9GBaMtAJHQpKnow=; b=ht05hPE/eLJZJMR7EITeDFCRFZOTxk6zkrUS2AlOd7nYShwO7J6M6pDSfVIuDvO6bsEWvw +V6B/CHjjXmIxZDQ== From: Sebastian Andrzej Siewior To: Manuel Ebner Cc: Clark Williams , Steven Rostedt , Jonathan Corbet , Shuah Khan , "open list:Real-time Linux (PREEMPT_RT)" , "open list:DOCUMENTATION" , open list Subject: Re: [PATCH] Documentation: index.rst: add entry of other sub-directory Message-ID: <20260603102020.ZsS16TaP@linutronix.de> References: <20260603080430.344391-2-manuelebner@mailbox.org> Precedence: bulk X-Mailing-List: linux-doc@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: <20260603080430.344391-2-manuelebner@mailbox.org> On 2026-06-03 10:04:31 [+0200], Manuel Ebner wrote: > add reference to scheduler/sched-rt-group.rst > > Signed-off-by: Manuel Ebner > --- > Documentation/core-api/real-time/index.rst | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/Documentation/core-api/real-time/index.rst b/Documentation/core-api/real-time/index.rst > index f08d2395a22c..661b419e7f8f 100644 > --- a/Documentation/core-api/real-time/index.rst > +++ b/Documentation/core-api/real-time/index.rst > @@ -15,3 +15,4 @@ the required changes compared to a non-PREEMPT_RT configuration. > differences > hardware > architecture-porting > + Real-Time group scheduling <../../scheduler/sched-rt-group> Have you been using this and are referencing this because it is useful or did you just happen to find it? People have been complaining about this and I *think* it fails to work in multi-CPU scenarios (it might work if the task is restricted to single CPU usage). Not entirely certain. But complains, that I am certain of. There is replacement underway to utilize SCHED_DL for this as in "Hierarchical Constant Bandwidth Server (HCBS)" https://lore.kernel.org/all/20260430213835.62217-1-yurand2000@gmail.com/ Sebastian