On Sun, Nov 20, 2005 at 09:22:41AM -0500, Greg Stark wrote:
> I don't think that's true. If the syscall was preemptable then it wouldn't
> show up under "iowait", but rather "idle". The time spent in iowait is time in
> uninterruptable sleeps where no other process can be scheduled.
You are confusing userspace with kernel space. When a process is stuck in
uninterruptable sleep, it means _that process_ can't be interrupted (say,
by a signal). The kernel can preempt it without problems.
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