On Thu, 30 Nov 2017 06:20:35 -0800 Christoph Hellwig <hch@xxxxxx> wrote: > Hi all, > > this series adds a strategic lockdep_assert_held to __wake_up_common > to ensure callers really do hold the wait_queue_head lock when calling > the unlocked wake_up variants. It turns out epoll did not do this > for a fairly common path (hit all the time by systemd during bootup), > so the second patch fixed this instance as well. What are the runtime effects of the epoll bug?
