On Thu, Jul 13, 2017 at 12:29:05PM +0200, Peter Zijlstra wrote: > On Thu, Jul 13, 2017 at 07:09:53PM +0900, Byungchul Park wrote: > > On Thu, Jul 13, 2017 at 11:50:52AM +0200, Peter Zijlstra wrote: > > > wait_for_completion(&C); > > > atomic_inc_return(); > > > > > > mutex_lock(A1); > > > mutex_unlock(A1); > > > > > > > > > <IRQ> > > > spin_lock(B1); > > > spin_unlock(B1); > > > > > > ... > > > > > > spin_lock(B64); > > > spin_unlock(B64); > > > </IRQ> > > > > > > Also consider the alternative: <IRQ> spin_lock(D); spin_unlock(D); complete(&C); </IRQ> in which case the context test will also not work. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
