[uml-devel] I/O Performance

[uml-devel] I/O Performance

[Nicolas Boullis]

Hi,

Sorry for insisting, but I think it would be nice if things could be
improved before linux 2.6.28.

When COW is not used, the performance is very bad because multiples I/O
are performed when one would be enough. Steve VanDeBogart's "ubd does
multiple io's when one will suffice" patch look clean and solves the
problem.

Performing parallel I/O also much improves the performance (at least
with ubd=sync), but my patch is certainly not clean enough for
inclusion. Jeff, you told me you had such a patch; would you like me tou
give it a try?


Cheers,

Nicolas Boullis

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