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
