linux-kernel - Re: [PATCH v5 2/3] Documentation: add a isolation strategy sysfs node for uacce

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Date:   Fri, 8 Jul 2022 09:30:22 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Kai Ye <yekai13@...wei.com>
Cc:     herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, wangzhou1@...ilicon.com
Subject: Re: [PATCH v5 2/3] Documentation: add a isolation strategy sysfs
 node for uacce

On Fri, Jul 08, 2022 at 03:08:19PM +0800, Kai Ye wrote:
> Update documentation describing sysfs node that could help to
> configure isolation strategy for users in the user space. And
> describing sysfs node that could read the device isolated state.
> 
> Signed-off-by: Kai Ye <yekai13@...wei.com>
> ---
>  Documentation/ABI/testing/sysfs-driver-uacce | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-driver-uacce b/Documentation/ABI/testing/sysfs-driver-uacce
> index 08f2591138af..a8056271a963 100644
> --- a/Documentation/ABI/testing/sysfs-driver-uacce
> +++ b/Documentation/ABI/testing/sysfs-driver-uacce
> @@ -19,6 +19,24 @@ Contact:        linux-accelerators@...ts.ozlabs.org
>  Description:    Available instances left of the device
>                  Return -ENODEV if uacce_ops get_available_instances is not provided
>  
> +What:           /sys/class/uacce/<dev_name>/isolate_strategy
> +Date:           Jul 2022
> +KernelVersion:  5.20
> +Contact:        linux-accelerators@...ts.ozlabs.org
> +Description:    A sysfs node that used to configures the hardware error

This is not a "node" it is just a file.


> +                isolation strategy. This strategy is a configured integer value.
> +                The default is 0. The maximum value is 65535. This value
> +                indicates the number of device slot resets per unit time
> +                that your service can tolerate.

I do not understand this, sorry.  What do you mean by "that your service
can tolerate"?

> +
> +What:           /sys/class/uacce/<dev_name>/isolate
> +Date:           Jul 2022
> +KernelVersion:  5.20
> +Contact:        linux-accelerators@...ts.ozlabs.org
> +Description:    A sysfs node that read the device isolated state. The value 0
> +                means that the device is working. The value 1 means that the
> +                device has been isolated.

So 1 means "not working"?  This seems odd, perhaps you can rephrase this
a bit better?

thanks,

greg k-h