On 18 Oct 2023, at 11:18, Charles Hedrick wrote: > Ubuntu added fasc, but it's a kernel parameter. It can be changed without > a reboot, so we were able to fix the problem. It appears that this has > become the default upstream. I looked at Ubuntu's kernel code for their > next LTS, and it looks like they've accepted the upstream code, so the > problem shouldn't occur in the next LTS. Meanwhile we've taken precautions > to set the option on all our systems. I'm surprised - I haven't seen any "fasc" mount option go upstream. Where did you see the upstream work? I'll probably hack up a patch to dump the access cache via sysfs file and send that sometime this week, I can copy you if you have interest. I'm thinking usage would look something like: echo <uid> > /sys/fs/nfs/0\:57/drop_access_cache Ben
