On Fri, Jul 01, 2016 at 12:00:50PM +0200, Jan Kara wrote:
> Hello,
> 
> On Thu 30-06-16 14:18:14, Nikolay Borisov wrote:
> > In light of the discussion in https://patchwork.kernel.org/patch/9187411/ 
> > and 
> > the discussion at 
> > https://groups.google.com/forum/#!topic/syzkaller/XvxH3cBQ134
> 
> Well, it looks it is also some bdi_writeback lifetime issue but I don't see
> how it would be related to I_DIRTY_TIME issues. There were couple of fixes
> related to bdi_writeback issues from Tejun since 4.4. Maybe Tejun can tell
> you whether he's seen this or not...

Yeah, this could be the same problem from the blkdev detach path.
Nikolay, was there any block device hot unplugging going on?  If not,
do you have a reproducer?

Thanks.

-- 
tejun
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