Subject: RE: [U-Boot] Does uboot EBS(erase block summary) to reduce JFFS2 scaning time? To: leon.he@msn.com CC: u-boot@lists.denx.de From: joakim.tjernlund@transmode.se Date: Tue, 3 Nov 2009 10:52:06 +0100
HeLei leon.he@msn.com wrote on 03/11/2009 10:39:48:
Subject: RE: [U-Boot] Does uboot EBS(erase block summary) to reduce JFFS2
scaning time?
To: leon.he@msn.com CC: u-boot@lists.denx.de From: joakim.tjernlund@transmode.se Date: Tue, 3 Nov 2009 10:29:47 +0100
HeLei leon.he@msn.com wrote on 03/11/2009 10:21:13:
Ok, thank you, jocke. Can you tell me how much time can be saved according to your idea, by your
experience?
Can't remember any figures, but is was lots by not scanning empty space. It all depends on how full your fs is.
Thanks, I got it! I think the problem of JFFS2 is it never store the index of file system in flash. However 1~2GiB flash is quite popular, how JFFS2 face such situation :(
JFFS2 isn't really suited for such big FS:es and works best on NOR flash. You should consider some other FS(YAFFS, LogFS, UBIFS etc.). I can't say which tough as I haven't used any of them.
I got it, thanks
Jocke
_________________________________________________________________ 上Windows Live 中国首页，下载Messenger2009安全版！ http://www.windowslive.cn