linux-kernel - Re: [PATCH V1 1/4] dt-bindings: ufs: qcom: Add qos property

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Message-ID: <3bed0f5e-372c-45f3-8995-0e8e7cdf1690@linaro.org>
Date:   Thu, 12 Oct 2023 14:54:04 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Maramaina Naresh <quic_mnaresh@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_cang@...cinc.com, quic_nguyenb@...cinc.com
Subject: Re: [PATCH V1 1/4] dt-bindings: ufs: qcom: Add qos property

On 10/10/2023 17:49, Maramaina Naresh wrote:
> Add bindings for per-cpu QoS for QCOM UFS. This improves random io
> performance by 20% for QCOM UFS.
> 
> Signed-off-by: Maramaina Naresh <quic_mnaresh@...cinc.com>
> ---
>  Documentation/devicetree/bindings/ufs/qcom,ufs.yaml | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> index 462ead5..d8b807e 100644
> --- a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> +++ b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> @@ -76,6 +76,14 @@ properties:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description: phandle to the Inline Crypto Engine node
>  
> +  qos:
> +    minItems: 2
> +    maxItems: 2

This was absolutely never tested.

Best regards,
Krzysztof