Hi,
During a SysRq emergency remount Btrfs mounts are not remounted. I tracked the
issue down to this line in do_emergency_remount() in fs/super.c:
if (sb->s_root && sb->s_bdev && (sb->s_flags & MS_BORN) &&
!(sb->s_flags & MS_RDONLY))
s_bdev is NULL for Btrfs super blocks and subsequently do_remount_sb() is
never called. I couldn't think of a solution, besides resorting to an ugly
strcmp(sb->s_type->name, "btrfs"), without adding a field to struct super_block
or similar changes.
Thoughts?
Flo
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