Re: [Xen-devel] [RFC][PATCH v1] xen-fbfront: replace deferred io with buffer queue

[Sergiy Kibrik <sergiy.kibrik@xxxxxxxxxxxxxxx>]

On 1/19/2015 3:25 PM, Stefano Stabellini wrote:
>> This doesn't sound like a secure interface: a potentially very
>> > significant and unbound memory allocation in dom0 is caused by a
>> > parameter configured by the guest.
>  
> Sorry, I realize now that fortunately it is the other way around.
> It would be nice to see a correspondent patch for xenfb (the backend).
> Who configures num_bufs initially in your system?
> 
AFAIK there's no backend code in xen-4.x tree anymore, I found it in
old releases. But I'll find a way to present backend as well.

num_bufs should be set by xl tool according to domain config file, but
we don't have patch for xl yet (it's done manually via xenstore-write in
our setup. Fairly ugly)

-- 
regards,
Sergey

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