linux-kernel - Re: [PATCH 00/47] PCI, x86: pci root bus hotplug support

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Message-ID: <CAE9FiQVmwRFP+KM6rCSEia+FvayxHP-VL_9sVX5r9AgDzGRGuQ@mail.gmail.com>
Date:	Tue, 20 Mar 2012 10:20:32 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, x86 <x86@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/47] PCI, x86: pci root bus hotplug support

On Mon, Mar 19, 2012 at 2:37 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> On Sun, Mar 18, 2012 at 11:45 PM, Yinghai Lu <yinghai@...nel.org> wrote:
>> will add pci_stop_and_remove_bus() to support remove bus in
>> /sys/devices/pci.../pci_bus/...
>>
>> To rescan root, need to
>> echo 1 > /sys/bus/pci/rescan_root
>>
>> It supports acpi path root bus and legacy root bus.
>
> I tried to start discussions about some interesting issues such as
> acpi_pci_root_rescan() and /sys/bus/pci/rescan_root.
>
> I don't think it's a good use of my time to re-review all these
> patches until after we make some progress on those conversations.

Actually I reordered that patch applying sequence.

 PCI, ACPI: Add acpi_pci_root_rescan()
 x86, PCI: Add arch version pci_root_rescan()
 PCI: Add /sys/bus/pci/rescan_root

will be applied at last. So Jesse could skip those 3 or so patches,
and upstream will only support really physical root-bus hotplug that
user need to press attention button.

     Yinghai
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