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Date: Tue, 25 Oct 2016 14:59:52 +0100
From: Bruce Richardson <bruce.richardson@intel.com>
To: Declan Doherty <declan.doherty@intel.com>
Cc: Ilya Maximets <i.maximets@samsung.com>, dev@dpdk.org,
 Heetae Ahn <heetae82.ahn@samsung.com>,
 Yuanhan Liu <yuanhan.liu@linux.intel.com>,
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Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] Revert "bonding: use existing
 enslaved device queues"
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On Wed, Oct 19, 2016 at 10:55:25AM +0100, Bruce Richardson wrote:
> On Thu, Oct 06, 2016 at 03:32:36PM +0100, Declan Doherty wrote:
> > On 07/09/16 13:28, Ilya Maximets wrote:
> > > This reverts commit 5b7bb2bda5519b7800f814df64d4e015282140e5.
> > > 
> > > It is necessary to reconfigure all queues every time because configuration
> > > can be changed.
> > > 
> > 
> > Hey Ilya, this makes sense. I guess this was my original intention but I
> > missed this case in my review of the change.
> > 
> > > For example, if we're reconfiguring bonding device with new memory pool,
> > > already configured queues will still use the old one. And if the old
> > > mempool be freed, application likely will panic in attempt to use
> > > freed mempool.
> > > 
> > > This happens when we use the bonding device with OVS 2.6 while MTU
> > > reconfiguration:
> > > 
> > > PANIC in rte_mempool_get_ops():
> > > assert "(ops_index >= 0) && (ops_index < RTE_MEMPOOL_MAX_OPS_IDX)" failed
> > > 
> > > Cc: <stable@dpdk.org>
> > > Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
> > > ---
> > 
> > Acked-by: Declan Doherty <declan.doherty@intel.com>
> 
> Applied to dpdk-next-net/rel_16_11
> 
Patch taken out of branch due to on-going discussion in this thread. It
can be re-applied later if consensus is reached that it is ok.

Apologies for any confusion caused by this, but after discussion with
the driver maintainer, we feel this is the safest course for now.

/Bruce