linux-kernel - Re: kernel 4.14.x crash around fsnotify_mark

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Message-ID: <3016af7f-97f0-e28d-96cd-e49fada3e88d@gmail.com>
Date:   Tue, 17 Apr 2018 16:15:07 +0200
From:   Pavlos Parissis <pavlos.parissis@...il.com>
To:     Jan Kara <jack@...e.cz>
Cc:     mszeredi@...hat.com, amir73il@...il.com,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: kernel 4.14.x crash around fsnotify_mark_connector

On 17/04/2018 04:02 μμ, 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.

Cheers,
Pavlos



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