On Tue, Jul 22, 2014 at 10:53 AM, Chris Mason <c...@fb.com> wrote:
>
> Thanks for the help in tracking this down everyone.  We'll get there!
> Are you all running multi-disk systems (from a btrfs POV, more than one
> device?)  I don't care how many physical drives this maps to, just does
> btrfs think there's more than one drive.

I've been away on vacation so I haven't been able to try your latest
patch, but I can try whatever is out there starting this weekend.

I was getting fairly consistent hangs during heavy IO (especially
rsync) on 3.15 with lzo enabled.  This is on raid1 across 5 drives,
directly against the partitions themselves (no dmcrypt, mdadm, lvm,
etc).  I disabled lzo and haven't had problems since.  I'm now running
on mainline without issue, but I think I did see the hang on mainline
when I tried enabling lzo again briefly.

Rich
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