* Re: lockdep issues with overlayfs
[not found] <20200609150756.GA6171@miu.piliscsaba.redhat.com>
@ 2020-06-09 16:53 ` Waiman Long
0 siblings, 0 replies; only message in thread
From: Waiman Long @ 2020-06-09 16:53 UTC (permalink / raw)
To: Miklos Szeredi, Peter Zijlstra, Ingo Molnar; +Cc: linux-kernel, linux-unionfs
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
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2020-06-09 16:53 ` lockdep issues with overlayfs Waiman Long
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