Rawly and recursively list files on device.
I noticed plain ls -lR was taking very long to finish when used on big filesystems. And worse it caused kernel to start caching all that stuff - even to point using swap.
Rawls fixes this. First is it blazing fast and processes ~4MiB of linux_dirent's at time. Second it issues hint to kernel to not cache any of the files we queried.
Rawls output is also easily machine parseable since each line of output has full pathname.
To compile it just invoke gcc: gcc -O2 -o rawls rawls.c
Example output of time ./rawls / >/tmp/rootdevfiles:
skipping: /proc
skipping: /media/DataTwo
skipping: /media/Data
skipping: /tmp
skipping: /dev
skipping: /sys
skipping: /boot
skipping: /run
sudo ./rawls / > /tmp/fsdump.list 3,54s user 18,83s system 55% cpu 40,465 total
less /tmp/fsdump.list
5000252;regular;64;32;1640145586009151860;'/root/.nft.history'
4980755;regular;141;32;1680386620938939456;'/root/.bashrc'
...
We see from above output that rawls also stays on its start device and won't recurse into mounts.
As for comparison here is same filesystem listed with ls -filR
sudo ls -filR /mnt > /tmp/rootdevfiles 13,31s user 36,43s system 71% cpu 1:09,14 total
ls was whole 17 seconds slower!!