[<prev] [next>] [day] [month] [year] [list]
Message-ID: <fff3ed1b-e470-a184-a4ef-de84f47879ab@redhat.com>
Date: Tue, 9 Jun 2020 12:53:50 -0400
From: Waiman Long <longman@...hat.com>
To: Miklos Szeredi <miklos@...redi.hu>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org
Subject: Re: lockdep issues with overlayfs
On 6/9/20 11:07 AM, Miklos Szeredi wrote:
> While running xfstests[1] on overlayfs I get the following:
>
> BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
> turning off the locking correctness validator.
> [...]
>
> Then when doing cat /proc/lockdep_chains I get this Oops:
>
> BUG: unable to handle page fault for address: ffffffff83b36da8
> #PF: supervisor read access in kernel mode
> #PF: error_code(0x0000) - not-present page
> PGD 2262067 P4D 2262067 PUD 2263063 PMD 0
Thanks for the information. There are some corruption in the lock chain
data some garbage shows up in your lockdep_chains. I will try to
reproduce the error to in order to figure out where the bug is.
Thanks,
Longman
Powered by blists - more mailing lists