From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f182.google.com (mail-oi1-f182.google.com [209.85.167.182]) (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 71F103A1C4 for ; Mon, 12 Feb 2024 16:12:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707754362; cv=none; b=rz8pQ0lzrSzT3MRai++Ex/MsEbt9Q78Il/qhh0gI7WRavpYR7ynFehgfpxV2iquh4uuMwAFzBJJzqxQdax/fHENEFFQax3C7k3aHL8eFwaSTwKC+jMV8SxQJ6LeR5jCEJ7WU306SeUaYXdTzLEMZnJtI8yS4BkzV5w1Q5lNlLVo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707754362; c=relaxed/simple; bh=hjpfnavnSyUNRxKxjGeJPa+p0ZtJoYNGtJgPcPDtYNI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EvsqrZSNtojO8xHekEHUo7ZDIMYjCLFO8x0EUxdk784q9ddEnidLvxYGfZwve66DZD8f1MC8BK05qOdu60hOjmt/82ayev56lWadGPcvXdqjoIMl9WMQfR76nw5CX8jGxIMoVhRQqBL1IecuGmZsu5uAd3FUE5QaFOC+7trysgs= 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=NTtswX6g; arc=none smtp.client-ip=209.85.167.182 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="NTtswX6g" Received: by mail-oi1-f182.google.com with SMTP id 5614622812f47-3c02b993a5aso1722747b6e.1 for ; Mon, 12 Feb 2024 08:12:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1707754359; x=1708359159; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=l89c1zdEClk9OzxFzVxI8SxYroKTpciFHiIYh7jXU9w=; b=NTtswX6gLDdwuRa+03pKWJV6o991eKFarIGvQRJzK8dxZ8fzAUARl+Dzw1x0kdAB2k SQTaijMUuFhj24F9MOv03hfv7azCxcOOlDHFKBNa4rDqvtVX0p0ewA/rx4e+obgsnxBU a3ULDDfm+5YSPtw6BIDJxQ/xGjSa2K4xk6bu3zA/U3jQpMq8gz4OT4Sd/gxyzA4FtWdw EMg83FzpJH29HwuWPmqqI5V6TlVNxnkLMt9nsMZWH5T0UCmv3Kqba5iNU0ElFr2WSnK+ u2sdjc2gZhUSH6sPLefbpR4jq5WMFDmVTs3lWG2WwS7EjKrrl8STl1QSuXjwKN+2gALB xCRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707754359; x=1708359159; h=in-reply-to:content-transfer-encoding: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=l89c1zdEClk9OzxFzVxI8SxYroKTpciFHiIYh7jXU9w=; b=TxckNr7apUp5s/jIy3pXog8pU9zvgIjj+tZNh43hm3FwW6282VHcHEhf8/ZuL14Pc4 Lvcc2dF4mpwLbyAQqltGgoUS1oleLTEaC4sa8H8NHTTRE2N1nvPweyZF4uHMTBRyXpF1 Z/C4loqEnZXRF5PzhhO+rGa+gWHmetyQZHx015ZImPA8xk59f2t+bYchQok9IMDgnLNj FtjIRIbuY0z9tDGNKg4mXBbcdUL3rmTZqUdFY15omxucy7tue5iuKIj/Mdl3hQ9Fami/ sDpqMouMf3IHwHcuZZWaTFeEcrVFSw8YmSSVn5wnlJueIM1HiPeVCzO4dScWzqJoZvfp CEyg== X-Gm-Message-State: AOJu0YycHheXwtrDYEK8qDtnRXfMu83RZkicW5w/gF3EdqzwqARZYb7Y svmddxItkkv4K0Fc0PPS0gPbnl3B6ybC6ibhqPypvN6kVtiAqRz9S5Jt6I0eoIk= X-Google-Smtp-Source: AGHT+IF57eEOnINfW3KU5hYwfAhCdQ0AsN2DgPLmd8pty1mdduoHCqJn179e7MOt/vFeheAsxTGZNQ== X-Received: by 2002:a05:6808:11cd:b0:3c0:a25:bb4e with SMTP id p13-20020a05680811cd00b003c00a25bb4emr8710566oiv.35.1707754359439; Mon, 12 Feb 2024 08:12:39 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCX3+yo2FW8j57g3Z/LynP/cK/oMWLVlRxtnwHh5L52w2YgNa9PANyCgGx9omWLEbDFku1AJOYRy+c3XvSN5KK1NLtQyFt/atoAApgA3Es1ZM596tQ8dmYfKN3ug76+vjqSkZkph7OeS5ZJ+/0KtO8zUyrP4IlT0RNhfouM2E+xNX+U/bx+Itt9l2Vms9y33ARY7ZPyFFTgQaXbmydCk Received: from ziepe.ca (hlfxns017vw-142-68-80-239.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.68.80.239]) by smtp.gmail.com with ESMTPSA id by8-20020a056808340800b003c035a3b3c3sm103312oib.54.2024.02.12.08.12.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Feb 2024 08:12:39 -0800 (PST) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1rZYv8-00HT8V-8U; Mon, 12 Feb 2024 12:12:38 -0400 Date: Mon, 12 Feb 2024 12:12:38 -0400 From: Jason Gunthorpe To: Kevan Rehm Cc: Mark Zhang , Leon Romanovsky , "linux-rdma@vger.kernel.org" , Yishai Hadas , kevan.rehm@hpe.com, chien.tin.tung@intel.com Subject: Re: Segfault in mlx5 driver on infiniband after application fork Message-ID: <20240212161238.GF765010@ziepe.ca> References: <3CAF66C4-32E1-4258-9656-D886843D7771@gmail.com> <20240212133303.GA765010@ziepe.ca> <8BB93F6F-14EC-4B43-B1F0-5FE185A64073@gmail.com> <20240212144013.GD765010@ziepe.ca> <53992378-7BB2-4E8C-BD3F-8A2B1FC837BD@gmail.com> 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=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <53992378-7BB2-4E8C-BD3F-8A2B1FC837BD@gmail.com> On Mon, Feb 12, 2024 at 11:04:36AM -0500, Kevan Rehm wrote: > Those routines call ibv_dontfork_range on the page after it’s been > allocated via posix_memalign(). _add_page() then adds the new page > to the mlx5_context field dbr_available_pages. Oh, if this is your trouble then upgrade your kernel. This part is fixed on kernels that have working fork support. Jason