From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-113.mta1.migadu.com [95.215.58.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9F3A48DB2E for ; Fri, 16 Oct 2026 18:16:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.113 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792174576; cv=none; b=FXWUibCs3j0LdoHw6rtrS16Qch4xAx7JGrK/nFc9NCLIKIJSfhDysBJUHvWT8sOcH4zYNopTIwEG0MPKFW+M8A/xQX83UxrDU39D3YvvMZj2PnpTmNGtDOOGEzbMrUiIltDi/D+YP4hMtW2abNz1Aqh3E11wr4gYR/1/KMmot5Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792174576; c=relaxed/simple; bh=hKxqtmnMKzg2k1LHoGfRy7pOphah5CSQcVYEKBnt1W8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kUvAeqh3keWiB7WTRCO9pvcFg+nYvOTgI7/4/kMID6eQlnutsljEo20P6PPgLn16j+1AQTC5eQlT1mNvf66qaG9Bx55X61xa2U+Q9gdtm8yDLZT40y9Ngc5tRISVnKUk+R4ZlW4I1ofSTJFi/PX/7uBtS4OZXQ6KLI+dRwYoedk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=FBce49R+; arc=none smtp.client-ip=95.215.58.113 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="FBce49R+" X-Envelope-To: linux-rt-devel@lists.linux.dev DKIM-Signature: a=rsa-sha256; bh=hKxqtmnMKzg2k1LHoGfRy7pOphah5CSQcVYEKBnt1W8=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792174570; v=1; x=1792779370; b=FBce49R+KChj41JlZE8cazB+GRzCeZIc5iOmBIHQ5UXsN2ZbI3195A+e+IvFdVSjHEIAdt6D v0E+u2eZZAasqGkDMgaicf3IEMVnnnA/4nBInkGteaxlN29Ug4CKgLmfiHVUtPE8eLfW88iwRfG vsHSjjp3wMHYkEEgCOFYU3k4= X-Envelope-To: linux-rt-devel@lists.linux.dev Received: by smtp.migadu.com with ESMTPS id bad43ae743273093; Fri, 16 Oct 2026 18:16:07 +0000 X-Mizu-Trace-ID: bad43ae743273093 X-Migadu-Flow: FLOW_OUT Message-ID: <2c3a8c0f-3820-4531-b179-b2656a7d3c7e@linux.dev> Date: Sat, 17 Oct 2026 02:16:02 +0800 Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6.1-rt 00/15] net: Backport backlog-NAPI threads to resolve PREEMPT_RT softirq warning in SMP flush To: Sebastian Andrzej Siewior , Clark Williams Cc: Steven Rostedt , linux-rt-devel@lists.linux.dev References: <20261014150853.f8I2fNx0@linutronix.de> <20261015133811.PtBdJYyx@linutronix.de> Content-Language: en-US From: Wen Yang In-Reply-To: <20261015133811.PtBdJYyx@linutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/15/26 21:38, Sebastian Andrzej Siewior wrote: > - NET + proper list > > On 2026-10-15 08:34:28 [-0500], Clark Williams wrote: >> I don't have a fundamental objection to the backport and agree we should >> do v6.6-rt first, then move that back to v6.1-rt. > > Okay. > >> So it sounds like we need to pull in the RPS code first? > > Yes. Wen, do you mind preparing a series for v6.6-RT? > Hi Sebastian, Clark, Thanks for the feedback. Agreed, v6.6-rt should be fixed first to avoid reintroducing the issue when users upgrade from v6.1-rt. Regarding the RPS prerequisites, I will check which upstream changes are already present in v6.6-rt and identify the remaining dependencies for the backlog-NAPI threads and defer_list cleanup. I will prepare and test a series for v6.6-RT soon. Thanks, Wen