linux-kernel - Re: xfs: Deadlock between fs_reclaim and sb

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Message-Id: <1635784.85vFEPy9OU@localhost.localdomain>
Date:   Sun, 01 Jul 2018 15:00:01 +0530
From:   Chandan Rajendra <chandan@...ux.vnet.ibm.com>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     darrick.wong@...cle.com, lkml <linux-kernel@...r.kernel.org>,
        allison.henderson@...cle.com, hch@....de,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-xfs@...r.kernel.org
Subject: Re: xfs: Deadlock between fs_reclaim and sb_internal

On Friday, June 29, 2018 11:48:39 AM IST Chandan Rajendra wrote:
> On Thursday, June 28, 2018 9:31:32 AM IST Ravi Bangoria wrote:
> > Hello Darrick,
> > 
> > Lockdep is reporting a deadlock with following trace. Saw this on my
> > powerpc vm with 4GB of ram, running Linus/master kernel. Though, I
> > don't have exact testcase to reproduce it. Is this something known?
> 
> I am able to recreate this issue on a ppc64le guest. I will debug this
> and provide updates.
> 

Ravi,

The issue has already been reported earlier. See 
https://www.spinics.net/lists/linux-xfs/msg20036.html.
I am not familiar with Lockdep code and hence won't be able to help here.

-- 
chandan