======  add_watch: cannot watch ======

<code bash>
Exception: Unable to update the server configuration with local parameters: Traceback (most recent call last):
...
pyinotify.WatchManagerError: add_watch: cannot watch /home/user/yocto/build/conf WD=-1, Errno=No space left on device (ENOSPC)
</code>

Reason:
System already has increased ''max_user_watches'' to 32k, but running remote VSCode which ''watch'' changes in huge Yocto directory consumes it.

Solution is to increase ''max_user_watches''
<code bash>echo fs.inotify.max_user_watches=65536 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p</code>
or even higher values.

How to monitor used watches:
<code bash>
find /proc/*/fd -lname anon_inode:inotify |
   cut -d/ -f3 |
   xargs -I '{}' -- ps --no-headers -o '%p %U %c' -p '{}' |
   uniq -c |
   sort -nr
</code>
from [[https://unix.stackexchange.com/questions/444998/how-to-set-and-understand-fs-notify-max-user-watches|How to set and understand fs.notify.max_user_watches]]