quoted

That is because of the lock it takes. Locks are always slow.

xtime_lock?

I guess so, after looked at do_gettimeofday

quoted

Possibilities:

- Ignore the problem and switch back to gettimeoffset again

Is it safe to call gettimeoffset without the lock?

What's the possible danger to ignore the lock? Can I read the xtime
directly?

quoted

- Switch to gettimeoffset but add some correction step for the unlikely
case that someone wants the timestamp from user space
(would be my prefered solution)
- Implement lockless gettimeofday like x86-64 or sparc
(good one too, but likely slower than last)

ia64 seems to also have the lock.

cheers,
jamal