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Thu, 16 Oct 2025 11:01:10 -0700 (PDT) Received: from ziepe.ca ([130.41.10.202]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7992d0e275csm22976026b3a.61.2025.10.16.11.01.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Oct 2025 11:01:10 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1v9SHk-00000000xL7-1iof; Thu, 16 Oct 2025 15:01:08 -0300 Date: Thu, 16 Oct 2025 15:01:08 -0300 From: Jason Gunthorpe To: Haakon Bugge Cc: Sean Hefty , Jacob Moroni , Leon Romanovsky , Vlad Dumitrescu , Or Har-Toov , Manjunath Patil , OFED mailing list , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH for-next] RDMA/cm: Rate limit destroy CM ID timeout error message Message-ID: <20251016180108.GO3938986@ziepe.ca> References: <07DE3BC6-827E-4311-B68B-695074000CA3@oracle.com> <20251015164928.GJ3938986@ziepe.ca> <20251015184516.GK3938986@ziepe.ca> <49A8CE60-DC8E-43F7-9620-D4D5F8EB2A08@oracle.com> <20251016161229.GM3938986@ziepe.ca> <6244F8C9-2067-4A8A-8DCD-02A4A2D117F6@oracle.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6244F8C9-2067-4A8A-8DCD-02A4A2D117F6@oracle.com> On Thu, Oct 16, 2025 at 04:43:16PM +0000, Haakon Bugge wrote: > Well, I started off this thread thinking a cm_deref_id() was missing > somewhere, but now I am more inclined to think as you do, this is an > unrecoverable situation, and I should work with NVIDIA to fix it. If the VF is just stuck and not progressing QPs for whatever reason then yes absolutely. At best all we can do is detect stuck QPs and try to recover them as I described. How hard/costly would it be to have a tx timer watchdog on the mad layer send q? At the very least we could log a stuck MAD QP.. Jason