Re: kernel 4.14.x crash around fsnotify_mark_connector

[Jan Kara]

On Tue 17-04-18 16:15:07, Pavlos Parissis wrote:
> On 17/04/2018 04:02 ÎÎ, Jan Kara wrote:
> > On Tue 17-04-18 12:39:32, Pavlos Parissis wrote:
> >> In one of our production servers where we run kernel version 4.14.32, I noticed
> >> the following:
> > 
> > OK, I was looking into this for some time and couldn't find a problem in
> > 4.14.32 code. Can you try running a kernel with CONFIG_DEBUG_SLAB and
> > CONFIG_DEBUG_PAGEALLOC enabled to hopefully catch the problem earlier?
> > Thanks!
> > 
> 
> I can certainly do that, but I can't reproduce that specific crash. So,
> it may take days before we get a similar crash. Having said that, the
> soft lockup issue, which I mentioned in another thread, happens once per
> day, so I hope running a kernel with those debug settings will help you.

Yes, the hope is debug checks will trigger faster than the actual data
corruption (or softlockup) you've hit.

								Honza
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR