Re: [Xen-devel] [PATCH] multi-page blkfront/blkback patch

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 28/11/08 08:41, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> +#ifndef CONFIG_XEN_BLKDEV_NUM_RING_PAGES
>> +#error "CONFIG_XEN_BLKDEV_NUM_RING_PAGES undefined!"
>> +#endif
> 
> This won't work when building unmodified_drivers - I'm not sure what value
> to default to here, though. But for compatibility it should probably be 1,
> and the unmodified drivers' Kbuild could override it if desired.

It should be a module parameter anyway. I don't think there's anything
particularly hard about choosing ring size at run time rather than build
time.

 -- Keir



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