Re: [Qemu-devel] [PATCH 4/4] Reallocate dma buffers in read/write path if needed

[Anthony Liguori]

Paul Brook wrote:
> On Friday 03 October 2008, Ryan Harper wrote:
>   
> > The default buffer size breaks up larger read/write requests unnecessarily.
> > When we encounter requests larger than the default dma buffer, reallocate
> > the buffer to support the request.
> >     
>
> Allocating unboundedly large host buffers based on guest input seems like a 
> bad idea.
>   

Perhaps they could be at least bound to phys_ram_size.

In general, I don't think there's a correct size to bound them that's 
less than phys_ram_size.  The guest may be issuing really big IO requests.

Regards,

Anthony Liguori

> Paul
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