From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Dingwall Subject: Re: netback oops in Linux 3.14 / 3.15 Date: Tue, 10 Jun 2014 20:51:33 +0100 Message-ID: <20140610195133.GA13676@dingwall.me.uk> References: <20140610182055.GA7348@dingwall.me.uk> <539751B1.2040602@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <539751B1.2040602@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Zoltan Kiss Cc: James Dingwall , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Tue, Jun 10, 2014 at 07:42:57PM +0100, Zoltan Kiss wrote: > It is very likely to be a recent issue, please apply this fix onto your > kernel: > > http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/drivers/net/xen-netback?id=59ae9fc67007da8b5aea7b0a31c3607745cfbfee > > Zoli Thanks for the pointer. I have tested with 3.15 and it seems to have solved the issue I was experiencing. James > > On 10/06/14 19:20, James Dingwall wrote: > > Hi, > > > > Under Linux 3.14.6 and 3.15 I am getting a BUG_ON() from netback in xenvif_rx_action(). Under 3.15 it is the line at > > 629 which is triggering: > > > > BUG_ON(ring_slots_used > max_slots_needed); > > > > The conditions are a 3.15.0 dom0 with Xen 4.4.0, a guest domain running the same 3.15.0 kernel, an rsync in the guest > > where the source filesystem is NFS mounted from the dom0. > > > > I have added a printk to log the values which is seen as the first line in the attached trace. Is there an off-by-one > > error in the calculation for max_slots_needed or is it worth adding some more printks to find out how the value was > > calculated? > > > > Please let me know if any other information about my configuration is required. > > > > Thanks, > > James > > > > > > > > _______________________________________________ > > Xen-devel mailing list > > Xen-devel@lists.xen.org > > http://lists.xen.org/xen-devel > > > -- ------------------------------------------------------------------------ James Dingwall e: james@dingwall.me.uk w: http://www.dingwall.me.uk/ ------------------------------------------------------------------------