In the last episode (Mar 27), Andrew said:
>
> On Tue, 26 Mar 2002, Terry Lambert wrote:
>
> > > Sure it can, if the idprio process has locked a vnode trying to update
Careful; I wrote the above line, not Terry.
> But if system calls aren't preempted under what circumstances can a
> process hold a vnode lock and then be usurped for processor?
System calls aren't preempted, but if while processing a syscall, the
kernel decides to tsleep(), say because of disk I/O (a very common
thing when dealing with vnodes :), then another process is free to
start running.
--
Dan Nelson
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