CFT - Xen infrastructure and block I/O improvements

[Rui Paulo]

On 17 Sep 2010, at 02:44, Justin T. Gibbs wrote:

> At Spectra Logic, we are using FreeBSD amd64 under Xen to serve storage
> to other Xen domains.  Over the past 9 months, we've made several changes
> to FreeBSD's Xen support.  These include:
> 
> o Support for backend devices (e.g. blkback)
> o Extensions to the Xen para-virtualized block API to allow for larger
>   and more outstanding I/Os.
> o A completely rewritten block back driver with support for fronting
>   I/O to both raw devices and files.
> o General cleanup and documentation of the XenBus and XenStore support code.
> o Robustness and performance updates for the block front driver.
> o Fixes to the netfront driver.
> 
> Some of these changes have already been pushed back into FreeBSD, but the
> bulk of them need additional testing, especially under i386 PV, before
> they can be committed.  If you work in the Xen area, I'd appreciate your
> review and/or testing of these changes.
> 
> http://people.freebsd.org/~gibbs/FreeBSD-head-xen-diffs_2010_09_16.txt

Justin, this is quite a big diff (16k lines). I wonder if you can create separate diffs (xenstore, blkback, xenbus, etc.) for easier review and commenting.


Regards,
--
Rui Paulo