Re: [Xen-devel] blkback global resources

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.03.12 at 11:21, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> On Tue, 2012-03-27 at 08:27 +0100, Jan Beulich wrote:
>> >>> On 26.03.12 at 18:53, Daniel Stodden <daniel.stodden@xxxxxxxxxxxxxx> 
>> >>> wrote:
>> > Then let the userland toolstack set things up according to physical I/O
>> > topology and properties probed. Basically every physical backend (say, a
>> > volume group, or a HBA) would start out by allocating and dimensioning a
>> > dedicated pool (named after the backend), and every backend instance
>> > fired up gets bound to the pool it belongs to.
>> 
>> Having userland do all that seems like a fallback solution only to me - I
>> would hope that sufficient information is available directly to the drivers.
>> 
> 
> I tempt to make all information available to drivers, but haven't
> reached a conclusion yet. Maybe we should also allow user to experiment
> various configuration for their specific needs?

Oh, yes, user overrides are certainly desirable. I was merely hinting
at it being desirable from my pov to have sensible default behavior.

Jan


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