[systemd-devel] [PATCH] readahead: add option to create pack in directory other than root

[Colin Walters]

On Tue, Jul 8, 2014, at 05:12 AM, Lennart Poettering wrote:
> 
> b) readahead-collect would check if /var/lib/systemd is on the same
>    mount point as /. If so, it would store the file in
>    /var/lib/systemd/readahead. Otherwise it would store the file in
>    /.readahead, as before.

If this logic was extended so that systemd also checked whether / was
writable, and fell back to writing to /var regardless, it would work for
OSTree at least.  (/ is immutable on ostree since
https://bugzilla.gnome.org/show_bug.cgi?id=728006 )