Re: doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots)

[William Lee Irwin III]

On Thu, 20 Feb 2003, Andrew Morton wrote:
>> Fixes two deadlocks in the scheduler exit path:
>> 1: We're calling mmdrop() under spin_lock_irq(&rq->lock).  But mmdrop
>>    calls vfree(), which calls smp_call_function().  

On Thu, Feb 20, 2003 at 11:04:41PM +0100, Ingo Molnar wrote:
> this has been fixed in the -F3 scheduler patch.

Not quite. It leaks mm's because schedule_tail() isn't cleaning
up rq->prev_mm.

-- wli