Re: [Xen-devel] [PATCH] Blktap: Userspace file-based image support. (RFC)

[Julian Chesterfield <jac90@xxxxxxxxxxxx>]

> Another question I have is this: doesn't the dependence on libaio
> limit you to certain filesystems?  For example, the page for libaio
> doesn't mention reisferfs as supported.  Does that mean that SLES
> users won't be able to use ublkback?
Dan, I've just tested blktap with a reiserfs base filesystem. There 
were no errors opening files with O_DIRECT, and the performance is 
proportionally similar to ext3 (average block reads close to native, 
average block writes above 80% under bonnie++). I'll explore further, 
however it seems that O_DIRECT is supported.
Thanks,
Julian

> Thanks for posting your code Andrew!
>
> --
> Dan Smith
> IBM Linux Technology Center
> Open Hypervisor Team
> email: danms@xxxxxxxxxx
>
> ------ End of Forwarded Message
>
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