> From: Michal Hocko <mhocko@xxxxxxxx> > Sent: Thursday, May 2, 2019 5:55 AM > > ... > > So far I only hit the BUG once and I don't know how to reproduce it again, so > this is just a FYI. > > ... > Do you think it would be possible to setup a crash dump > or apply the following debugging patch in case it reproduces? > Michal Hocko Now I applied the "dump_page(page);" and let's see if I'll hit the BUG again. BTW, I'm developing some code to support hibernation for Linux VM running on Hyper-V. I don't think my own change causes the BUG, as my change does not touch the mm system or any file system code at all. Thanks, -- Dexuan