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From: Waiman Long <longman@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org
Subject: Re: lockdep issues with overlayfs
Date: Tue, 9 Jun 2020 12:53:50 -0400	[thread overview]
Message-ID: <fff3ed1b-e470-a184-a4ef-de84f47879ab@redhat.com> (raw)
In-Reply-To: <20200609150756.GA6171@miu.piliscsaba.redhat.com>

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



           reply	other threads:[~2020-06-09 16:53 UTC|newest]

Thread overview: expand[flat|nested]  mbox.gz  Atom feed
 [parent not found: <20200609150756.GA6171@miu.piliscsaba.redhat.com>]

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