config files and how to have persistent Linux kernel Driver/File System configuration info saved

Theodore Y. Ts'o tytso at
Thu Jun 28 22:58:57 UTC 2018

On Thu, Jun 28, 2018 at 05:37:15PM -0500, Steve French wrote:
> Ronnie brought up an interesting point about the problems consistently
> configuring file systems (or any Linux module for that matter) so that
> reboot doesn't wipe away security or performance tuning changes.

In general it's considered best practice to make the file system
auto-tune itself as much as possible, because the sad fact is that
99.9999% of the customers aren't going to bother to add any tuning
parameters.  So there hasn't been a push to try to create something
more complex, because it's generally not needed.

Settings via /sys/fs/ext4 are generally for developers as they try to
understand how things work, so they can improve the file systems
defaults / auto-tuning algorithms.

						- Ted

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