linux-kernel - Re: [PATCH v3 3/3] PCI: Introduce the disable_acs

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Message-ID: <aa50bbcf-73ad-271f-c926-09d9e0369665@deltatee.com>
Date:   Mon, 18 Jun 2018 16:25:31 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-doc@...r.kernel.org, Stephen Bates <sbates@...thlin.com>,
        Christoph Hellwig <hch@....de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH v3 3/3] PCI: Introduce the disable_acs_redir parameter



On 18/06/18 04:21 PM, Alex Williamson wrote:
> Seems that too much is taken from the dynamic resource alignment that
> doesn't necessarily apply to a read-only, commandline-only, device
> discovery-only option.  I don't think we need locking, I don't think we
> need a massive static buffer, ideally perhaps even no buffer, just a
> pointer to commandline.  Thanks,

Yeah, fair points. I'll take another look and see what I can strip out.

Thanks,

Logan