Re: [PATCH] improve OProfile on many-way systems

[John Levon]

On Sun, Aug 22, 2004 at 02:34:00PM +1000, Anton Blanchard wrote:

> > That must be profile_rwsem in kernel/profile.c since the rest of the
> > code won't be doing anything. I imagine it needs RCUing.
> 
> Also profile_hook is called in the interrupt handler and has a global
> spinlock (profile_lock). If the notifier hooks used RCU then we wouldnt
> need this lock.

If that were the problem he'd see it with profile=2 though, since it
uses the same mechanism... should still be fixed of course.

john
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