On 07/09/2015 06:44 AM, John Crispin wrote: >> I have the below change to add rudimentary support for sysupgrade on the >> Raspberry Pi. I looked at the way platform_copy_config() is implemented >> for x86 and tried to do the same, but I get the following error on mount: >> >> mount: mounting /dev/mmcblk0p2 on /mnt failed: Device or resource busy > > in that case its either still flushing the cache or has not been > properly unmounted i think. you could try adding the "partprobe" tool to > force a rescan of the table but i am not sure this is the problem here
You are right. I tried 'partprobe -s /dev/mmcblk0' and it shows the partitions correctly but mount still fails. I also tried 'sync' before trying to mount to flush the cache with no effect. So the suspect is that it has not been properly unmounted. So I tried to 'unmount -f /dev/mmcblk0p2' but that fails with "umount: can't forcibly umount /dev/mmcblk0p2: Invalid argument" Here are the mounts at that time: rootfs on / type rootfs (rw) proc on /proc type proc (rw,noatime) sysfs on /sys type sysfs (rw,noatime) tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime) tmpfs on /dev type tmpfs (rw,relatime,size=512k,mode=755) devpts on /dev/pts type devpts (rw,relatime,mode=600) debugfs on /sys/kernel/debug type debugfs (rw,noatime) tmpfs on / type tmpfs (rw,nosuid,nodev,noatime) "rootfs on / type rootfs (rw)" should be the RAM rootfs, no? How and were to unmount / correctly? bruno _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
