[Xen-devel] blkback feature announcement

["Jan Beulich" <JBeulich@xxxxxxxx>]

Hello,

is there a particular reason why "max-ring-page-order" gets written in
xen_blkbk_probe(), but e.g. "feature-max-indirect-segments" and
"feature-persistent" get written only in connect(), despite both having
constant values (and hence the node value effectively being known as
soon as the device exists)?

Or in more general terms: Shouldn't it be well defined at what time
a frontend can rely on certain nodes to be available for inspection?
And in doing so, I'd expect the determination to be done such that
widest flexibility is provided towards the actual implementation, i.e.
nodes should be written as early as possible. (Of course this applies
to other frontend/backend pairs too.)

Thanks, Jan


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