On Sat, 13 Sep 2014 19:55:25 +0200 Johannes Hirte <johannes.hi...@datenkhaos.de> wrote:
> On Sat, 13 Sep 2014 13:36:37 +0800 > Anand Jain <anand.j...@oracle.com> wrote: > > > Xavier, Johannes, > > > > The quickest workaround for you will be to try to match > > the device path as in the btrfs fi show -m </mnt> output to > > your probably fstab/mnttab entry. > > Doesn't work here. I don't even get a path with the affected kernels. > I'll get: > > Label: none uuid: 02edbd6b-f044-4800-b21e-ca8982c2c2e5 > Total devices 1 FS bytes used 270.10GiB > *** Some devices missing > > Btrfs v3.16 > > with a working kernel: > > Label: none uuid: 02edbd6b-f044-4800-b21e-ca8982c2c2e5 > Total devices 1 FS bytes used 270.10GiB > devid 1 size 293.89GiB used 289.06GiB path /dev/sda1 > > Btrfs v3.16 > > Filesystem layout is: > > subvolid 0 contains only the different subvolumes > > ID 257 gen 414674 top level 5 path rootfs > ID 269 gen 414615 top level 5 path home-USER1 > ID 317 gen 411498 top level 5 path home-USER2 > ID 363 gen 410939 top level 5 path home-USER3 > ID 382 gen 315844 top level 5 path home-USER4 > ID 933 gen 410514 top level 5 path home-USER5 > ID 995 gen 315756 top level 5 path homefs-USER6 > > subvol rootfs (ID 257) is set to the default subvolume, mounted at > start. Grub commandline is like following: > > root=/dev/sda1 ro rootflags=subvol=rootfs,inode_cache,autodefrag > > It doesn't matter, if the subvol parameter is set. I've tried with, > without and with subvolid=0 parameter. Everytime the same result. > > > And now I was able to reproduce on a second machine. The main > difference between the affected and the unaffected systems is > initramfs. On the affected systems, I don't use one. On the working > systems, the rootfs is mounted via initramfs before. I'll test, if an > initramfs will solve the issue. Seems likely, cause if I put the disk > of an affected system into a working system and mount it there, > everything works. Of course, with the initramfs it works. Content of the init-script: #!/bin/sh mount -t devtmpfs devtmpfs /dev mount -t proc proc /proc mount -t sysfs sysfs /sys mount -t tmpfs tmpfs /run sleep 3 # wait for kernel msgs to quiet echo "loading initrd" btrfs dev scan sleep 5 mount -o ro,subvol=rootfs,inode_cache,autodefrag /dev/sda1 /newroot if [[ -x /newroot/sbin/init ]]; then umount /sys /proc exec switch_root /newroot /sbin/init fi #rescue shell exec sh -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html