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Message-ID: <90d13f1f-79aa-4067-b949-6f18cb1bb229@acm.org>
Date: Tue, 19 Dec 2023 09:00:31 -0800
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Subject: Re: [PATCH V6 1/2] ufs: core: Add CPU latency QoS support for ufs
 driver
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To: Maramaina Naresh <quic_mnaresh@quicinc.com>,
 "James E.J. Bottomley" <jejb@linux.ibm.com>,
 "Martin K. Petersen" <martin.petersen@oracle.com>,
 Peter Wang <peter.wang@mediatek.com>,
 Matthias Brugger <matthias.bgg@gmail.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Alim Akhtar <alim.akhtar@samsung.com>, Avri Altman <avri.altman@wdc.com>,
 Stanley Jhu <chu.stanley@gmail.com>, linux-scsi@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
 linux-arm-kernel@lists.infradead.org, quic_cang@quicinc.com,
 quic_nguyenb@quicinc.com
References: <20231219123706.6463-1-quic_mnaresh@quicinc.com>
 <20231219123706.6463-2-quic_mnaresh@quicinc.com>
From: Bart Van Assche <bvanassche@acm.org>
In-Reply-To: <20231219123706.6463-2-quic_mnaresh@quicinc.com>
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On 12/19/23 04:37, Maramaina Naresh wrote:
> Register ufs driver to CPU latency PM QoS framework to improve
> ufs device random io performance.
> 
> PM QoS initialization will insert new QoS request into the CPU
> latency QoS list with the maximum latency PM_QOS_DEFAULT_VALUE
> value.
> 
> UFS driver will vote for performance mode on scale up and power
> save mode for scale down.
> 
> If clock scaling feature is not enabled then voting will be based
> on clock on or off condition.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>