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xen-devel
Re: [Xen-devel] [PATCH] Add dm-userspace to the Xen kernel
Nivedita Singhvi wrote:
Anthony Liguori wrote:
I think dm-userspace is great, but I don't think it belongs in
patches/. To quote Chris W.:
"Good things there are bits that are ready to go upstream or fixes to
base Linux that are transient by version (backport of a fix that's in
the -rc for the next kernel or somesuch)."
Until this ends up in -mm, I really don't think we should add this to
the -xen tree as it has no dependence on Xen. We should be good
members of the kernel community here and go through the normal
channels. At any rate, I would think that you would want it to be
useful first before adding it which means bringing in all of the
tools into the tree.
It won't be useful in the kernel unless there are actual
consumers, of which Xen could/might be one. Having a use
case flesh out problems and get the performance and design
architecture examined in detail will be useful to the Linux
maintainers - they get something more robust and better
designed, although it's certainly not Xen's obligation to
provide that, per se. I'm just seeing the possibility of
mutual benefit, here.
That said, I believe since the patch is in the device-mapper
tree for review, there is a good chance it will go into
kernel in any case.
Agreed. I think it's a good idea to let it go through that review
process before going into the Xen tree. As I said, once it's in -mm, I
would imagine that it the interfaces would be stable enough that there's
no harm putting it into the Xen tree.
Especially since libdmu is being considered for inclusion in the
device-mapper userspace. Things would get pretty ugly if the
dm-userspace ABI changes between now and when it shows up in -mm as
there'd be conflicting userspace packages.
Regards,
Anthony Liguori
thanks,
Nivedita
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