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
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