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Date: Sat, 7 Mar 2026 19:38:14 +0200
From: Leon Romanovsky <leon@kernel.org>
To: Long Li <longli@microsoft.com>
Cc: Konstantin Taranov <kotaranov@microsoft.com>,
	Jakub Kicinski <kuba@kernel.org>,
	"David S . Miller" <davem@davemloft.net>,
	Paolo Abeni <pabeni@redhat.com>, Eric Dumazet <edumazet@google.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>, Jason Gunthorpe <jgg@ziepe.ca>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	"K . Y . Srinivasan" <kys@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	Simon Horman <horms@kernel.org>, netdev@vger.kernel.org,
	linux-rdma@vger.kernel.org, linux-hyperv@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH rdma-next 0/8] RDMA/mana_ib: Handle service reset for
 RDMA resources
Message-ID: <20260307173814.GN12611@unreal>
References: <20260307014723.556523-1-longli@microsoft.com>
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In-Reply-To: <20260307014723.556523-1-longli@microsoft.com>

On Fri, Mar 06, 2026 at 05:47:14PM -0800, Long Li wrote:
> When the MANA hardware undergoes a service reset, the ETH auxiliary device
> (mana.eth) used by DPDK persists across the reset cycle — it is not removed
> and re-added like RC/UD/GSI QPs. This means userspace RDMA consumers such
> as DPDK have no way of knowing that firmware handles for their PD, CQ, WQ,
> QP and MR resources have become stale.

NAK to any of this.

In case of hardware reset, mana_ib AUX device needs to be destroyed and
recreated later.

The same is applicable for mana.eth as well.

Thanks