linux-kernel - Re: [PATCH 0/7] PCI: Improvements for native PCIe hotplug

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Message-ID: <20171009084739.GK2761@lahna.fi.intel.com>
Date:   Mon, 9 Oct 2017 11:47:39 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Ashok Raj <ashok.raj@...el.com>,
        Keith Busch <keith.busch@...el.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Lukas Wunner <lukas@...ner.de>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <yehezkel.bernat@...el.com>,
        Mario.Limonciello@...l.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] PCI: Improvements for native PCIe hotplug

On Tue, Sep 26, 2017 at 05:17:13PM +0300, Mika Westerberg wrote:
> Hi,
> 
> Currently when plugging PCIe device using native PCIe hotplug Linux PCI
> core tries to allocate bus space and resources so that the newly enumerated
> topology barely fits there. Now, if the PCIe topology that was just plugged
> in has more PCIe hotplug ports we will run out of bus space and resources
> pretty quickly. There is a workaround for this by passing pci=hpbussize=N
> in the kernel command line but it runs to the same situation after next
> hotplug.

Hi Bjorn,

Do you have any comments regarding this series? I think I need to respin
this on top of Andy's for_each_pci_bridge() patch but if there are other
comments I can address them at the same time.

Thanks!