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Re: [PATCH] xen/console: make console buffer size configurable


  • To: dmkhn@xxxxxxxxx
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Tue, 18 Feb 2025 17:05:27 +0100
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  • Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger.pau@xxxxxxxxxx, sstabellini@xxxxxxxxxx, dmukhin@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 18 Feb 2025 16:05:35 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 12.02.2025 23:31, dmkhn@xxxxxxxxx wrote:
> --- a/xen/drivers/char/Kconfig
> +++ b/xen/drivers/char/Kconfig
> @@ -96,6 +96,18 @@ config SERIAL_TX_BUFSIZE
>  
>         Default value is 32768 (32KiB).
>  
> +config CONRING_SIZE
> +     int "Console buffer size"
> +     default 32768
> +     range 16384 134217728
> +     help
> +       Select the boot console buffer size (in bytes).

Why in bytes when ...

> +       Note, the value provided will be rounded down to the nearest power of 
> 2.

... this rounding is done anyway? Why have people type in complicated numbers?
A granularity of 1k would already be an improvement; yet better would be if
this was a power-of-two value altogether.

Jan



 


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