On Thu, Dec 05, 2013 at 02:52:34PM -0800, Kent Overstreet wrote: > On Thu, Dec 05, 2013 at 10:29:13PM +0100, Matthias Ferdinand wrote: > Erk. I thought I was done with these bugs. Nick, do you think you could try and > track this down? > > Looking at this: > http://dl.mfedv.net/md5raid_on_bcache_panic/mdraid5_on_bcache_panic_3.12.2.txt > > that's a null pointer deref; if Matthias could get the exact line number it I have no idea how to do that - can you help me out on that? > Matthias - I'm running bcache on top of a raid6 at home and I've never seen I only get panics when I use md-raid on top of bcaches: LVM | md-raid5 / | \ bcache0 bcache1 bcache2 | | | sdb6 sdc6 sdd6 (probably an unusual setup; just playing around...) To reproduce, just writing anything to an LV on top of this should do (linear writes). If some r/w random i/o is then added (start of VM in my setup), it breaks. Regards Matthias -- 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
