Re: kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373!

Path	csiph.com!aioe.org!bofh.it!news.nic.it!robomod
From	"J. Bruce Fields" <bfields@fieldses.org>
Newsgroups	linux.kernel
Subject	Re: kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373!
Date	Fri, 03 Jun 2016 15:20:01 +0200
Message-ID	<rFXb3-3BY-1@gated-at.bofh.it> (permalink)
References	<rFvRw-3oj-27@gated-at.bofh.it> <rFH6h-2bE-15@gated-at.bofh.it> <rFTqO-1hO-21@gated-at.bofh.it>
MIME-Version	1.0
Content-Type	text/plain; charset=us-ascii
Content-Disposition	inline
User-Agent	Mutt/1.5.21 (2010-09-15)
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	41
Organization	linux.* mail to news gateway
X-Original-Cc	linux-fsdevel@vger.kernel.org, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
X-Original-Date	Fri, 3 Jun 2016 09:14:21 -0400
X-Original-Message-ID	<20160603131421.GA24548@fieldses.org>
X-Original-References	<574FE57F.7080209@univention.de> <20160602200201.GA15429@fieldses.org> <57514B1C.3080506@univention.de>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	csiph.com linux.kernel:1413226

Show key headers only | View raw

On Fri, Jun 03, 2016 at 11:17:16AM +0200, Philipp Hahn wrote:
> Hello,
> 
> Am 02.06.2016 um 22:02 schrieb J. Bruce Fields:
> > On Thu, Jun 02, 2016 at 09:51:27AM +0200, Philipp Hahn wrote:
> >> probably during heavy IO our file server crashed on a BUG_ON in dache.c,
> >> probably triggered by NFS:
> >>
> >>> ------------[ cut here ]------------
> >>> kernel BUG at /var/build/temp/tmp.BPql4ErveJ/pbuilder/linux-3.16.7-ckt25/fs/dcache.c:2373!
> ...
> >> Our kernel is 3.16.7-ckt25 from Debian + ckt26 and ckt27 on top.
> > 
> > So this is the BUG_ON(!d_unhashed(..)) at the top of __d_rehash?  I
> > don't know the -ckt kernels, and I don't have a BUG at line 2373 of
> > dcache.c, or something else?
> 
> Yes, exactly that first line.

Oh, from googling... it looks like that's what they're calling the
Ubuntu kernels these days?  It'd be best to have them triage this first.

> > There have been a lot of changes in the area since 3.16.7.
> 
> Too bad.
> Any concrete hint or should I better spent my time convincing management
> to install a newer Linux kernel?

I don't know if a newer kernel's better, but if you were able to
reproduce this frequently then experimenting with different kernel
versions might be one way to work this out.

I suppose 75a2352d0110960aeee1a28ddc09a55f97c99100 might in theory be a
fix?  Not a tall sure of that, though.

--b.

> 
> Anyway, thank you for the response.
> 
> Philipp

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373! Philipp Hahn <hahn@univention.de> - 2016-06-02 10:10 +0200
  Re: kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373! bfields@fieldses.org (J. Bruce Fields) - 2016-06-02 22:10 +0200
    Re: kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373! Philipp Hahn <hahn@univention.de> - 2016-06-03 11:20 +0200
      Re: kernel BUG at linux-3.16.7-ckt25/fs/dcache.c:2373! "J. Bruce Fields" <bfields@fieldses.org> - 2016-06-03 15:20 +0200

csiph-web