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 AC0D0289374; Thu, 20 Nov 2025 09:49:25 +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=1763632165; cv=none; b=bgVVEj+tCnxa0O0jkodb21p/cdbuVHs0VlBpGqpkokhs64rtaLTf+lyQ9yWZ0kx+mmE6RS+0vYRXWmsxQJZ8NNniTc/nmppnznoOidstc+ScDgTOZYnYixrsTpO3ihY9UQMgIeNjgtgH/sIl7heETKRabxZoaTrCsFVIVfXNWE0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763632165; c=relaxed/simple; bh=dvM4B7LduGqZwCK3+WCn/AZAsheZGY6nLWevOlwFGXw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=dgCh3YL56IFLXzGE+2K6w99S1SuKqSaIiFh/xE6agsnZ5fK4eB/TQp6iua3sAodPzPFfMgLg+iEzuJkkPLn8PhNYODMsuQ7cCuK9pu6xiZ/EtgwbG7++vYTfbqfRfNbVRDKPT9siZ91yETwRE6pWHX5+w6EQh20UbRg6IDCUC84= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QydbJRKb; 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="QydbJRKb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57CCCC116B1; Thu, 20 Nov 2025 09:49:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763632165; bh=dvM4B7LduGqZwCK3+WCn/AZAsheZGY6nLWevOlwFGXw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=QydbJRKbzt7P36AxXU5H6YaKV91cAvE+dXtVbZYTH/X+JDMegROXfejygzC0T5lZp 2NK84RtFK3090kpEdngEsX2MZb/wiT1nk/H4I2YO6nLP2Fq8PqosRMogNh8o4p6XbW UiuxbiciVO1oVvMFKtCgnRmVn8JR4ch7KjLf0n/1y/9tfSTrOBJiQ+dSnCLEGcjZDT l8BfksBYeXpIiMyM4iIJjwTqBQ7qz4EJa4cp8YLWIO/9QR9+MhJNzLFtLf/zreH+ej WUHD0SexoBsg+83ARugzYaSFDfZW3Q/xM8Jn+wH4xW310zVIoxYYAyKUxGSpjTyKhO Bp1Gxcu6gvlcg== Message-ID: Date: Thu, 20 Nov 2025 09:49:19 +0000 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 0/6] media: iris: prepare support for video codecs on Qcom vpu4 platform To: Vikash Garodia , Dmitry Baryshkov Cc: Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Vishnu Reddy , Bryan O'Donoghue , Vishnu Reddy References: <20251107-knp_video-v3-0-50c86cbb0eb8@oss.qualcomm.com> <3vbq76dpjnadfrnufojq4zqiv7p5p555rhxfx6yoncc354p3lk@ohcs3ldhuoao> <2d56fc4b-6e3c-4f83-aab1-c48db3b8bb2d@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/11/2025 05:09, Vikash Garodia wrote: >> One additional bonus is that fluster runs several process in parallel >> by default, catching issues caused by several decode threads running >> in parallel. >> > multi process issue is due to below [1] (tried it on lemans). Due to > higher concurrency, we can see that the DMA buffer is mapped into > un-addressable range (0-0x25800000) i.e 0x24b00000, and leading to > global fault. This was the reason i was keeping 2 memory-region in > kaanapali binding, to restrict certain ranges of IOVA. If that is currently true then we should restrict concurrent sessions entirely unless/until it can be safely supported. --- bod