On Thu, Sep 09, 2021 at 02:00:04PM +0300, Amir Goldstein wrote:

On Tue, Sep 7, 2021 at 9:33 AM Murphy Zhou [off-list ref] wrote:

quoted

Hi,

Since this commit:

commit ec44610fe2b86daef70f3f53f47d2a2542d7094f
Author: Amir Goldstein [off-list ref]
Date:   Tue Aug 10 18:12:19 2021 +0300

    fsnotify: count all objects with attached connectors




Kernel fsnotify can't finish a stress testcase that used to pass quickly.

Kernel hung at umount. Can not be killed but restarting the server.

Reproducer text is attached.

Hi Murphy,

Thank you for the detailed report.
I was able to reproduce the hang and the attached patch fixes it for me.
Cloud you please verify the fix yourself as well?

That's quick. You rock Amir. Testing.

This is a good regression test.
Did you consider contributing it to LTP?
I think the LTP team could also help converting your reproducer to
an LTP test (CC: Petr).

Ya, this is part of a stress test I maintained. Post to LTP is on
my todo list, for a long time.. I'll work on this.

Thanks,
Amir.

-- 
Murphy