On 8 Jan 2023 14:25:48 -0800 PM Munehisa Kamata <kamatam@xxxxxxxxxx> wrote: > > That patch survived the repro in my original post, however, the waker > (rmdir) was getting stuck until a file descriptor of the epoll instance or > the pressure file got closed. So, if the following modified repro runs > with the patch, the waker never returns (unless the sleeper gets killed) > while holding cgroup_mutex. This doesn't seem to be what you expected to > see with the patch, does it? Even wake_up_all() does not appear to empty > the queue, but wake_up_pollfree() does. Thanks for your testing. And the debugging completes. Mind sending a patch with wake_up_pollfree() folded? Hillf
