From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sinan Kaya <okaya@codeaurora.org>
Subject: Re: [PATCH] PCI: Add pci=safemode option
Date: Wed, 30 May 2018 11:28:42 -0400
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To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>, Gabriele Paoloni <gabriele.paoloni@huawei.com>, "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>, linux-pci@vger.kernel.org, Keith Busch <keith.busch@intel.com>, Kai-Heng Feng <kai.heng.feng@canonical.com>, Ingo Molnar <mingo@kernel.org>, Christoffer Dall <cdall@linaro.org>, Jonathan Corbet <corbet@lwn.net>, timur@codeaurora.org, "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>, Dongdong Liu <liudongdong3@huawei.com>, David Rientjes <rientjes@google.com>, Thymo van Beers <thymovanbeers@gmail.com>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Frederick Lawler <fred@fredlawl.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Marc Zyngier <marc.zyngier@arm.com>, linux-arm-msm@vger.kernel.orgFrederic
List-Id: linux-arm-msm@vger.kernel.org

On 5/30/2018 10:56 AM, Bjorn Helgaas wrote:
> This *was* my idea, but I'm starting to think it was a bad idea.
> 
> I don't want people to use pci= parameters as the normal way to get a
> system to boot.  That would be a huge support hassle (putting things
> in release notes, diagnosing problems when people forget it, etc).
> 
> But the parameters *are* useful for debugging.  If we had a
> "pci=safemode" and it avoided some problem, the next step would be to
> narrow it down by using the more specific flags (pci=nomsi, pci=noari,
> pci=no_ext_tags, etc).  So I think 95% of the value is in the specific
> flags, and a "pci=safemode" might add a little bit of value but at the
> cost of a small but nagging maintenance concern and code clutter.

OK. Let's try noXYZ feature. Can you enumerate the XYZ features that you
want to see?

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.