CFT - Xen infrastructure and block I/O improvements

[Rui Paulo]

On 17 Sep 2010, at 07:55, Rui Paulo wrote:

> 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.

'... and comment'.

Regards,
--
Rui Paulo