From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 BB15E481B1 for ; Fri, 15 Aug 2025 04:35:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755232538; cv=none; b=ikU0evWntP/rKJLazeNtGM5w6i6dqpbMyruUN0u0f2c6fE3AyMH4IpiYs2DWneYyl/mlxv3m8RAJxoKaowe9JcGbgyGlz1hoqKhEEkk+Vte13FnbGIs2QwnFWmDVRZj2kDEmDLwovvHKMxBE8e5aHAr245hp9fcBudHBFowExMs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755232538; c=relaxed/simple; bh=9eQLcCfJKHZzqpoRSejOUwJu3t+rEcFE1zLLnuifpPY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=FpzFbZ5FD8fqzANXMJQg6UOF3dXAFuWwYsH98q6lhbaTExetmKAaYKWJ+YP7CrnsxyNtze8QYL15cDhS+5ll5X2DDiHHNw2GhYObNjWi8JOkQHlMP+AZ8ARBNEjtuwXAtvfbUZABeIK5Y8VahtI4fmvqFuqlzf86RGSBhmEGEeo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Mj9ZpvrV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Mj9ZpvrV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E209EC4CEEB; Fri, 15 Aug 2025 04:35:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755232538; bh=9eQLcCfJKHZzqpoRSejOUwJu3t+rEcFE1zLLnuifpPY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Mj9ZpvrV34fzsb9HIQeQwFGHisFMXcjpnkweu6v8htuqLPbblqeFlxwJQ9Y/2WUiM XAktlw/VfcHLxuPgXYuydw3E91tnEOP1q6Uuy42fKbtCrd2VyrW6gQMROutygvrW7/ DV5KnE3zKzb6k/HxM+qZPD9Q5krtHWF9XFpVffNn2wWQarY0UxraRT4MbOnl+qcikQ nfMzk9U4U9cjEx/tbnj4znAPKz//gMhBn9wCDRzRCQs0G1tHW5TIW9yFKPdvC8IqJU 1M0jhhRsK5fsuQp9vjAPJB1hRbT7k2fpN42MqzXMbUnD3P1A0D2zvTrB/gFSJCQ6jr GXGnCIVX6ZpZg== Message-ID: Date: Fri, 15 Aug 2025 06:35:32 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 1/1] sched/deadline: Fix RT task potential starvation when expiry time passed To: Geert Uytterhoeven , Kuyo Chang Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Matthias Brugger , AngeloGioacchino Del Regno , jstultz , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org References: <20250615131129.954975-1-kuyo.chang@mediatek.com> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 30. 07. 25, 12:06, Geert Uytterhoeven wrote: >> [Proposed Solution]: >> ------------------ >> Instead of immediately re-enqueuing the DL entity on timer registration >> failure, this change ensures the DL entity is properly replenished and >> the timer is restarted, preventing RT potential starvation. >> >> Signed-off-by: kuyo chang > > Thanks, this fixes the issue I was seeing! > > Closes: https://lore.kernel.org/CAMuHMdXn4z1pioTtBGMfQM0jsLviqS2jwysaWXpoLxWYoGa82w@mail.gmail.com > Tested-by: Geert Uytterhoeven As well as: Closes: https://lore.kernel.org/all/58c46200-95b0-4cd8-bb5e-44f963a66875@kernel.org/ Tested-by: Jiri Slaby thanks, -- js suse labs