tree 7eed7ad5a2f795f8b45187db4955eff9c5ef049a
parent 69973b830859bc6529a7a0468ba0d80ee5117826
author Anton Ivanov <aivanov@kot-begemot.co.uk> 1478724205 +0000
committer Richard Weinberger <richard@nod.at> 1481752015 +0100

um: UBD Improvements

UBD at present is extremely slow because it handles only
one request at a time in the IO thread and IRQ handler.

The single request at a time is replaced by handling multiple
requests as well as necessary workarounds for short reads/writes.

Resulting performance improvement in disk IO - 30%

Signed-off-by: Anton Ivanov <aivanov@kot-begemot.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>