Re: read-only fs, kernel 4.9.0, fs/btrfs/delayed-inode.c:1170 __btrfs_run_delayed_items,

[Chris Murphy <lists@colorremedies.com>]

On Wed, Jan 11, 2017 at 4:13 PM, Chris Murphy <lists@colorremedies.com> wrote:
> Looks like there's some sort of xattr and Btrfs interaction happening
> here; but as it only happens with some subvolumes/snapshots not all
> (but 100% consistent) maybe the kernel version at the time the
> snapshot was taken is a factor?

The kernel version at the time the snapshot is taken is not a factor.
I've taken a snapshot of a working subvolume, and booting the snapshot
fails during startup with the fs forced readonly with kernel 4.9 and
higher; the problem doesn't happen with kernel 4.8.17 and lower.

As a further test I tried:


git checkout tags/v4.9
git revert 6c6ef9f26e598fb977f60935e109cd5b266c941a

But I get a failure during compile:

scripts/Makefile.build:293: recipe for target 'fs/xattr.o' failed
make[1]: *** [fs/xattr.o] Error 1
Makefile:988: recipe for target 'fs' failed
make: *** [fs] Error 2

Anyway, the inability to boot snapshots means bootable rollbacks are
broken. I think this is a serious regression, what's the next step in
figuring out what's going on?


-- 
Chris Murphy