Re: [PATCH 00/14] Pramfs: Persistent and protected ram filesystem

Jamie Lokier
2009-06-13T16:00:12Z

Marco wrote:
> Linux traditionally had no support for a persistent, non-volatile
> RAM-based filesystem, persistent meaning the filesystem survives a
> system reboot or power cycle intact. The RAM-based filesystems such as
> tmpfs and ramfs have no actual backing store but exist entirely in the
> page and buffer caches, hence the filesystem disappears after a system
> reboot or power cycle.

Why is a ramdisk not sufficient for this?

Why is an entire filesystem needed, instead of simply a block driver
if the ramdisk driver cannot be used?

It just struck me as a lot of code which might be completely
unnecessary for the desired functionality.

-- Jamie