Re: [CFT][RFC] HT scheduler

Nick Piggin
2003-12-11T15:51:39Z

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?