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Re: [PATCH v1] xen/console: group pbuf under console field


  • To: dmkhn@xxxxxxxxx
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Tue, 10 Jun 2025 10:10:44 +0200
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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, 10 Jun 2025 08:10:56 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 06.06.2025 21:49, dmkhn@xxxxxxxxx wrote:
> From: Denis Mukhin <dmukhin@xxxxxxxx>
> 
> Group all pbuf-related data structures under domain's console field.

Fine with me in principle, as I was indeed wondering about the lack of
grouping when the sub-struct was introduced, but ...

> @@ -654,6 +648,12 @@ struct domain
>  
>      /* Console settings. */
>      struct {
> +        /* hvm_print_line() and guest_console_write() logging. */
> +#define DOMAIN_PBUF_SIZE 200
> +        char *pbuf;
> +        unsigned int pbuf_idx;
> +        spinlock_t pbuf_lock;
> +
>          /* Permission to take ownership of the physical console input. */
>          bool input_allowed;
>      } console;

... since all uses of the fields need touching anyway, can we perhaps
think of giving the fields better names? I never understood what the
'p' in "pbuf" actually stands for, for example. My suggestion would
be to replace "pbuf" by "glog" (for "guest logging"), but surely there
are alternatives.

Jan



 


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