linux-kernel - Re: kernel panics with 4.14.X versions

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Message-ID: <20180419202302.vj2eu43hy77g5mv7@quack2.suse.cz>
Date:   Thu, 19 Apr 2018 22:23:02 +0200
From:   Jan Kara <jack@...e.cz>
To:     Pavlos Parissis <pavlos.parissis@...il.com>
Cc:     Jan Kara <jack@...e.cz>, Guillaume Morin <guillaume@...infr.org>,
        stable@...r.kernel.org, decui@...rosoft.com, jack@...e.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        mszeredi@...hat.com, Robert Kolchmeyer <rkolchmeyer@...gle.com>
Subject: Re: kernel panics with 4.14.X versions

On Wed 18-04-18 10:32:21, Pavlos Parissis wrote:
> On 17/04/2018 02:12 μμ, Jan Kara wrote:
> > On Tue 17-04-18 01:31:24, Pavlos Parissis wrote:
> >> On 16/04/2018 04:40 μμ, Jan Kara wrote:
> > 
> > <snip>
> > 
> >>> How easily can you hit this?
> >>
> >> Very easily, I only need to wait 1-2 days for a crash to occur.
> > 
> > I wouldn't call that very easily but opinions may differ :). Anyway it's
> > good (at least for debugging) that it's reproducible.
> > 
> 
> Unfortunately, I can't reproduce it, so waiting 1-2 days is the only
> option I have.

Good news guys, Robert has just spotted a bug which looks like what I'd
expect can cause your lockups / crashes. I've merged his patch to my tree
and will push it to Linus for -rc3 so eventually it should land in
appropriate stable trees as well. If you are too eager to test it out, it
is attached for you to try.

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR

View attachment "0001-fsnotify-Fix-fsnotify_mark_connector-race.patch" of type "text/x-patch" (2889 bytes)