On 2019-05-09 14:33:20 [-0500], miny...@acm.org wrote: > From: Corey Minyard <cminy...@mvista.com> > > The function call do_wait_for_common() has a race condition that > can result in lockups waiting for completions. Adding the thread > to (and removing the thread from) the wait queue for the completion > is done outside the do loop in that function. However, if the thread > is woken up, the swake_up_locked() function will delete the entry > from the wait queue. If that happens and another thread sneaks > in and decrements the done count in the completion to zero, the > loop will go around again, but the thread will no longer be in the > wait queue, so there is no way to wake it up.
applied, thank you. Sebastian
