On Mon, Dec 11, 2017 at 10:19:28AM +0100, Daniel Vetter wrote: > On Fri, Dec 08, 2017 at 11:54:19AM +0100, Peter Zijlstra wrote: > > 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> > > Who's going to pick this up? Ingo, Andrew? This didn't seem to have made it into -rc4. Anything needed to get it going? Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
