Re: [PATCH 01/16 v5] pramfs: documentation

[Pavel Machek]

Hi!

> +But the disk-based fs over non-volatile RAM block driver approach has
> +some drawbacks:
> +
> +1. Complexity of disk-based fs: disk-based filesystems such as ext2/ext3/ext4
> +   were designed for optimum performance on spinning disk media, so they
> +   implement features such as block groups, which attempts to group inode data
> +   into a contiguous set of data blocks to minimize disk seeking when accessing
> +   files. For RAM there is no such concern; a file's data blocks can be

Yes, and they are also used on 99% of machines out there -> well
debugged.

Is there fsck for pramfs available, for example?

> +   This increases the efficient use of space on the media, i.e. more
> +   space is dedicated to actual file data storage and less to meta-data
> +   needed to maintain that file data.

So... how big is overhead of pramfs compared to ext2?

Can pramfs handle powerdown at arbitrary time?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/