um: UBD Improvements

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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>

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Anton Ivanov 2016-11-09 20:43:25 +00:00 • committed by Richard Weinberger

parent 69973b8308

commit f88f0bdfc3

3 changed files with 167 additions and 27 deletions

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5

arch/um/drivers/ubd.h

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168

arch/um/drivers/ubd_kern.c

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21

arch/um/drivers/ubd_user.c

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