From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05C0EC433FE for ; Wed, 16 Nov 2022 06:05:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230299AbiKPGFG (ORCPT ); Wed, 16 Nov 2022 01:05:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230128AbiKPGFC (ORCPT ); Wed, 16 Nov 2022 01:05:02 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3966C21277 for ; Tue, 15 Nov 2022 22:05:02 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C5AB361A43 for ; Wed, 16 Nov 2022 06:05:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58F79C433C1; Wed, 16 Nov 2022 06:05:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668578701; bh=dUmzkPluZtQiyq2oNa5xsUNc4WZFXNBLWs3LEsw5NT4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=u+BqUzFBS6c1zo+GXWkPLS0w97BkkEIylWYnVBleWgxks+rgjBWl/34RF9tPmYQqi NQsW/uY8mF9m8N39Wxj6gmLbHw8MFPC+/GYx/Ix/7Vmf5Ir+I13rSLWTUdlqwT4mJp tnTSnaR4b5XWU2gG0MiUJ0+fTb2sJ6DT9PSJYpLj7hR6DFFJSXMyKgvLwDkq3/s+wF E+Kr8CD3/Nn+r7cRoLfW8g8jpv7nHzDQdHrkCHiKN1/uf7p0BVzNw4B0YBPz6kTiDC THzdZhV+30bmnICIpRswIhFK8vrlJEFuSzvCK/3uwlYdJmIVia9fk0vjQIKXZf3QOh oHQknlrm1ZGpw== Date: Wed, 16 Nov 2022 08:04:56 +0200 From: Leon Romanovsky To: "Samudrala, Sridhar" Cc: Michal Swiatkowski , netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, intel-wired-lan@lists.osuosl.org, jiri@nvidia.com, anthony.l.nguyen@intel.com, alexandr.lobakin@intel.com, wojciech.drewek@intel.com, lukasz.czapnik@intel.com, shiraz.saleem@intel.com, jesse.brandeburg@intel.com, mustafa.ismail@intel.com, przemyslaw.kitszel@intel.com, piotr.raczynski@intel.com, jacob.e.keller@intel.com, david.m.ertman@intel.com, leszek.kaliszczuk@intel.com Subject: Re: [PATCH net-next 00/13] resource management using devlink reload Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Nov 15, 2022 at 07:59:06PM -0600, Samudrala, Sridhar wrote: > On 11/15/2022 11:57 AM, Leon Romanovsky wrote: <...> > > > In case of ice driver lspci -vs shows: > > > Capabilities: [70] MSI-X: Enable+ Count=1024 Masked > > > > > > so all vectors that hw supports (PFs, VFs, misc, etc). Because of that > > > total number of MSI-X in the devlink example from cover letter is 1024. > > > > > > I see that mellanox shows: > > > Capabilities: [9c] MSI-X: Enable+ Count=64 Masked > > > > > > I assume that 64 is in this case MSI-X ony for this one PF (it make > > > sense). > > Yes and PF MSI-X count can be changed through FW configuration tool, as > > we need to write new value when the driver is unbound and we need it to > > be persistent. Users are expecting to see "stable" number any time they > > reboot the server. It is not the case for VFs, as they are explicitly > > created after reboots and start "fresh" after every boot. > > > > So we set large enough but not too large value as a default for PFs. > > If you find sane model of how to change it through kernel, you can count > > on our support. > > I guess one main difference is that in case of ice, PF driver manager resources > for all its associated functions, not the FW. So the MSI-X count reported for PF > shows the total vectors(PF netdev, VFs, rdma, SFs). VFs talk to PF over a mailbox > to get their MSI-X vector information. What is the output of lspci for ice VF when the driver is not bound? Thanks > > >