Hi, On Tue, Mar 29 2011, Ben Dooks wrote: > On Wed, Mar 30, 2011 at 08:33:12AM +0900, NamJae Jeon wrote: >> Hi. Chris. >> >> I found some problem in mmc driver. As you know, in nand trend, emmc >> nand is used booting device in embededd product. > > yeah, a really nasty trend if you ask me. > >> It means that kernel, rootfs image is stored in emmc nand device. and >> when rescaning mmc, mmc driver is working by delay work queue. >> >> It can be cause "can not mount rootfs". If kernel mounting is faster >> than mmc rescan, this problem would occur.. >> >> I changed to schedule_work instead of mmc_schedule_delayed_work. I can >> make patch & test. >> >> could you tell me your opinion ? > > Use root_wait on the commandline and it will wait for the root device > to become reayd. Ben's right that you should use "rootwait" (I don't think it works with the underscore in the middle), rootdelay=5 if you want the boot to fail if the partition isn't mounted after a little extra time, or an initrd if you want full control over rootfs mounting. These parameters are documented in Documentation/kernel-parameters.txt. Thanks, - Chris. -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
