On Mon, Dec 23, 2024 at 12:47:50PM +0100, Edgar Fu? wrote: > Suppose I have a (FFS) fs mounted with atime (e.g., without -o noatime) > and I null-mount that fs somewhere else with -o noatime. > Will that do what I expect, e.g. will operations on the null-mounted fs > leave the on-disc atimes alone?
That's an excellent question. I would say that it should, but whether it _does_ is anyone's guess. If you try it, let us know :-) > The use case I have in mind is restoring from a backup; updating the atimes > of the directories would be a waste of time since the backup program will > restore them afterwards anyway. Or is there an easier way for this? Enabling wapbl for the undump (if you otherwise don't) will probably get you 95% of the win (over traditional) without taking any real work. You might also undump with -oasync on the grounds that if the cat pulls out the power while you're doing it you can just newfs and start over. Although that depends on what/how much you're restoring. -- David A. Holland dholl...@netbsd.org