libblock performance question

[strauman at slac.stanford.edu (Till Straumann)]

Hi.

I am thinking about using libblock for implementing an NFS client.
However, I am a little bit concerned about libblock using task
preemption disabling. Code that is executed with preemption
disabled is not trivially short - therefore, I am a bit concerned that
using libblock might degrade dispatching latency for high priority tasks
(who possibly are not using a FS or libblock whatsoever).

Can anybody resolve my doubts?

Cheers,
--Till.