Re: [CFT][RFC] HT scheduler

[Nick Piggin]

William Lee Irwin III wrote:

> William Lee Irwin III wrote:
>
> > > Volano is all one process address space so it could be ->page_table_lock;
> > > any chance you could find which spin_lock() call the pounded chunk of the
> > > lock section jumps back to?
>
> On Fri, Dec 12, 2003 at 02:30:27AM +1100, Nick Piggin wrote:
>
> > OK its in futex_wait, up_read(&current->mm->mmap_sem) right after
> > out_release_sem (line 517).
> > So you get half points. Looks like its waiting on the bus rather than
> > spinning on a lock. Or am I'm wrong?
>
> There is a spinloop in __up_read(), which is probably it.

Oh I see - in rwsem_wake?


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