My apologies if I do not have the bug report protocol correct in posting here. I've noticed an issue with the CIFS client in kernel 6.5.0/6.5.1 that does not exist in 6.4.12 or other previous kernels (I have not tested 6.4.13). Almost immediately after mounting a CIFS share, the reported load average on my system goes up by 2. At the time this occurs I see two [cifsd-cfid-laundromat] kernel threads running the "D" state, where they remain for the entire time the CIFS share is mounted. The load will remain stable at 2 (otherwise idle) until the share is unmounted, at which point the [cifsd-cfid-laundromat] threads disappear and load drops back down to 0. This is easily reproducible on my system, but I am not sure what to do to retrieve more useful debugging information. If I mount two shares from this server, I get four laundromat threads in "D" state and a sustained load average of 4. The client is running Gentoo Linux, the server is a Seagate Personal Cloud NAS running Samba 4.6.5. Mount options used are "noperm,guest,vers=3.02". The CPUs do not actually appear to be spinning, the reported load average appears incorrect as far as actual CPU use is concerned. I am happy to follow any instructions provided to gather more details if I can help to track this down. Nothing that appears relevant appears in syslog or dmesg output. Thank you.
