Hi, One small addendum: On Mon, 2 Apr 2018, at 15:17, Nikolaus Rath wrote: > $ uname -a > Linux rescue 4.16.0 #2 SMP Mon Apr 2 13:20:45 BST 2018 x86_64 GNU/Linux This is the kernel I used for debugging, in regular operation the system was running the Debian stretch stable kernel (4.9.0, corresponding to upstream 4.9.82). Best, -Nikolaus -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html