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

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 for posting your code Andrew!

Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms@xxxxxxxxxx

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