From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f169.google.com (mail-qt1-f169.google.com [209.85.160.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9E86225A47 for ; Thu, 8 May 2025 12:25:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746707143; cv=none; b=KmHTKXUNciKV2ORON5oaj3Rio30dLKU+0ngGkiVavL/XnOOQkY/l6Fq01/dQi93q1rseTPrMiF5/dgzyVty9G0/zAq/I8xpfLlAR2uIdcbyrfmiFbNfU3U3myLpdcCPgPWPxFbRdNYc9SFlgMFTXE8AWvZAEHkvueLHgiePbfM8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746707143; c=relaxed/simple; bh=MPM2nuyUYlMB2FrqlYHGhR3ey1tqTnhLzD2lp+HJm2c=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dlNeYmviP5QamffCezEnO6cMESCIDEYF+91JbCH3uhVR2NvXks3nJENUSyd0sx1FwJJ6dO82Kk/eaPFswWREbNbLU7UdgIp1peNiBFc2ThLLYNhfQNy6TifmmwSbylzRNo3AHFtBMPiLvwzIrwLgrz61ezlqgg3R572MxZoxfo4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b=Q8e2ZNQ5; arc=none smtp.client-ip=209.85.160.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="Q8e2ZNQ5" Received: by mail-qt1-f169.google.com with SMTP id d75a77b69052e-4769bbc21b0so10557261cf.2 for ; Thu, 08 May 2025 05:25:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1746707140; x=1747311940; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=MPM2nuyUYlMB2FrqlYHGhR3ey1tqTnhLzD2lp+HJm2c=; b=Q8e2ZNQ5wGrzw03gpS9N86sbZtaFdq74sMp2YzmMLtp2bCxmPNTKFbz5FXx7jggjUo 8Sz/QqG/05dKNb8M1n1PsYOofwaW3R2PtSuynxo5Mc1rTTozEi/PaxJyA47htBYt1xKU 37n3sOL6jOaX3FFwGDnrtPy0rwXuoPt4I6xcNCPtTchc84PfVU0sfJgpjfKXaiYfyMJO ikawg1zbHlIM5NrfwncAPvyf5xjmmXa6Z1S4f0PwRtiUrBLKYJ/j80eVc2CwMVE4570N o/jdKJcJrDB2rgtSerL1EszvuN2N9XpLj2i7nZ4viV7rNoWdB2HFK+abuB2awuNO2mNq l12g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746707140; x=1747311940; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=MPM2nuyUYlMB2FrqlYHGhR3ey1tqTnhLzD2lp+HJm2c=; b=oxDSzxhkmWSHPJPHRlpFo7a0YdLNJaHqhQIdN5+hr1wrgEY1Z3DUwhi0D561pVPy3c xYyUIm5NXMiGYexY/eJoK36ayZYZxigCuwcK3C/1iWvGJ/ZLZhfDmZjRoyji40fAUdOT 7B8SBLt4ShKxyf4g0s4/CsEI4LuN5INyjCLSCxIYBatHvEfUadD+aq/ugi8U+6YYsX8R 20zfe8+K7dhc8ykMlD74kCAQeneOV9ucbNqcnelYEzEs2ayXBJ+560KDCcQM854GOXqQ yj11vYcbUZjmP59y5jl5AhxoVnI0gda9FgY+rGVSBAeD8D7CUha2ZdWEhlsxrmAk3Xt6 PpGQ== X-Forwarded-Encrypted: i=1; AJvYcCWO6mZKvfF1uz5vnHZ4btD3kqz6JYj/DvOqw84DZj1HKnAV0xoKyBP3tdrs4RUbdYLo2FpGa2ewqHw7@vger.kernel.org X-Gm-Message-State: AOJu0YzvcyuIDsUUGrH4B9d+d42ey6MpY94Xs/szN79Dxk7+BQoU6alp szOspQOAU0aVyKTW6hG7sHsRWCO12w68XL9v4kmZ0omcDNnxC/r22zNXrGTFVjCQHetmQ27cOIw R X-Gm-Gg: ASbGnctVwIcI1xssH++UKGDbtfpmGqKAIotzXnh50xNc4R3JmB2D3iPFK+oim0HoKbA jB2n4q47vjZzkpp0iO9SQGiaBXgFbAsQ80W3dkYhAB1q8fa1vfR+BE72iG6sfbyjXwVIt/K9LiX uNXOGFLi/lrSy5pzQgGll8T6YYzpBGPGdZZaQsWrtoqdof2FjAgJzLSSIm7fjBRpyCrvgumJZ+p cKNDq+YkNoc7jgrS+Idmit3GVVcJWmsdyzrshPuLWy8DJuFTZwrMEzbJcql3EoOMkGkCoocRfyc 53gcXQ/2xxUjaOJiLP94x7UACc5RU1mR+bhVWzAeL7TfbLWXnML8rjqv/RRpYt7k/+k9V114IRM zFGjTehGv7OkoDizV X-Google-Smtp-Source: AGHT+IGjPkkheV8apeeXL7LUq2iF5xAtFaXB1jDnzmyHtoO9fJMw0oyoMGJs/ppBBX9R4BQ+OduBOg== X-Received: by 2002:ac8:5955:0:b0:48d:7cb6:4010 with SMTP id d75a77b69052e-492264f43d0mr96133521cf.23.1746707140464; Thu, 08 May 2025 05:25:40 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-167-56-70.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.167.56.70]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4922126b6a3sm34885331cf.21.2025.05.08.05.25.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 May 2025 05:25:39 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1uD0Jn-000000001gm-10DS; Thu, 08 May 2025 09:25:39 -0300 Date: Thu, 8 May 2025 09:25:39 -0300 From: Jason Gunthorpe To: Shinichiro Kawasaki Cc: Bernard Metzler , "linux-nvme@lists.infradead.org" , "linux-rdma@vger.kernel.org" , Daniel Wagner Subject: Re: [bug report] blktests nvme/061 hang with rdma transport and siw driver Message-ID: <20250508122539.GA6371@ziepe.ca> References: Precedence: bulk X-Mailing-List: linux-rdma@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: On Thu, May 08, 2025 at 07:03:03AM +0000, Shinichiro Kawasaki wrote: > One left question is why the failure was not observed with rxe driver, but with > siw driver. My mere guess is that is because siw driver calls id->add_ref() and > cm_id->rem_ref(). Only siw uses the code in iwcm.c, rxe does not. Bernard? What do you think about this analysis? I've never really looked inside iwcm.c.. Thanks, Jason