Hi. I recently upgraded to kernel series 5.10 from 4.19 and I now get warnings like this in dmesg: page:00000000e966ec4e refcount:1 mapcount:0 mapping:0000000000000000 index:0xd3414 pfn:0x14914a flags: 0x8000000000000077(locked|referenced|uptodate|lru|active|workingset) raw: 8000000000000077 ffffdc7f4d312b48 ffffdc7f452452c8 0000000000000000 raw: 00000000000d3414 0000000000000000 00000001ffffffff ffff8fd080123000 page dumped because: fuse: trying to steal weird page The warning in fuse_check_page() doesn't check for PG_workingset which seems to be what trips the warning. I'm not entirely sure this is a bogus warning but there used to be similar bogus warnings caused by a missing PG_waiters check. The PG_workingset page flag was introduced in 4.20 which explains why I get the warning now. I only get the new warning if I do writes to a fuse fs (mergerfs) and at the same time put the system under memory pressure by running many qemu VMs. /Thomas Lindroth
