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-embedded" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
