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Date: Wed, 30 Jul 2014 20:47:50 +0800
From: Fengguang Wu <fengguang.wu@intel.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>, Jet Chen <jet.chen@intel.com>,
        Su Tao <tao.su@intel.com>, Yuanhan Liu <yuanhan.liu@intel.com>,
        LKP <lkp@01.org>, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [delayed_fput] BUG: unable to handle kernel paging request at
 ffff8800122a0ad0
Message-ID: <20140730124750.GB7717@localhost>
References: <20140730035541.GD16537@localhost>
 <20140730111521.GB759@infradead.org>
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On Wed, Jul 30, 2014 at 04:15:21AM -0700, Christoph Hellwig wrote:
> On Wed, Jul 30, 2014 at 11:55:41AM +0800, Fengguang Wu wrote:
> > Greetings,
> > 
> > 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> How does this manage to trip over a 2 year old commit now?

The bug is first discovered in linux-next, then the older kernel
releases (v3.15, v3.14, ...) are tested step by step, until it's found
to be introduced between v3.5 and v3.6. Then bisect can be started:

git bisect start v3.6 v3.5 --

Thanks,
Fengguang