missed JFFS2's Erase Block Summary (EBS) feature ?

Posted Feb 26, 2013 6:02 UTC (Tue) by vapier (guest, #15768)
Parent article: JFFS2, UBIFS, and the growth of flash storage

JFFS2 has had Erase Block Summary (EBS) support for quite a long time which drastically speeds up mount time:
http://www.linux-mtd.infradead.org/doc/jffs2.html

some actual performance numbers shows this can easily be a 6x speed increase:
http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel...

covering yaffs would also have been cool :).

i wonder if the changes you made to block2mtd result in numbers that are really comparable. by faking out the erase steps (which in a real flash is not free -- erasing tends to be the slowest operation), ubifs is no longer resilient to power losses right ? unlike the others which would be able to recover. so you've given a nice speed increase to ubifs w/out any such grant to the others. or am i missing something obvious ?