On Thu, Dec 07, 2017 at 11:08:49AM +0100, Daniel Vetter wrote: > Since -rc1 we're hitting a bunch of lockdep splats using the new > cross-release stuff around the 2 kthread completions. In all cases > they are because totally independent uses of kthread are mixed up by > lockdep into the same locking class, creating artificial deadlocks. > > Fix this by converting kthread code in the same way as e.g. > alloc_workqueue already works: Use macros for the public api so we can > have a callsite specific lockdep key, then pass that through the > entire callchain. Due to the many entry points this is slightly > tedious. > > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > Cc: Marta Lofstedt <marta.lofstedt@xxxxxxxxx> > Cc: Byungchul Park <byungchul.park@xxxxxxx> > Cc: Ingo Molnar <mingo@xxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: Tejun Heo <tj@xxxxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Shaohua Li <shli@xxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: Jens Axboe <axboe@xxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Cc: Jonathan Corbet <corbet@xxxxxxx> > Cc: Oleg Nesterov <oleg@xxxxxxxxxx> > References: https://bugs.freedesktop.org/show_bug.cgi?id=103950 > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
