Re: [RFC] simple_lmk: Introduce Simple Low Memory Killer for Android

[Steven Rostedt]

On Mon, 13 May 2019 09:45:55 -0700
Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx> wrote:

> On Fri, May 10, 2019 at 05:10:25PM +0200, Oleg Nesterov wrote:
> > I am starting to think I am ;)
> > 
> > If you have task1 != task2 this code
> > 
> > 	task_lock(task1);
> > 	task_lock(task2);
> > 
> > should trigger print_deadlock_bug(), task1->alloc_lock and task2->alloc_lock are
> > the "same" lock from lockdep pov, held_lock's will have the same hlock_class().  

OK, this has gotten my attention.

This thread is quite long, do you have a git repo I can look at, and
also where is the first task_lock() taken before the
find_lock_task_mm()?

-- Steve