On Sat, Nov 17, 2007 at 11:29:54AM -0700, Alex Chiang wrote:
> Hi all,
>
> This is v3 of the pci_slot patch series.
>
> The major change is making the ACPI-PCI slot driver a Kconfig
> option, as per the recommendations of others (Gary, Kenji-san).
Alex, What I was trying to suggest is a boot-time kernel option,
not a kernel configuration option. The basic idea is to give
the user (with a single binary kernel) the ability to include
your ACPI-PCI slot driver feature changes only when they are
really needed. In addition to reducing the number of
system/PCI hotplug driver combinations where your changes
would need to be validated, I believe would also help
alleviate other worries (e.g. Andi Kleen's memory consumption
concern). I believe this goal could also be achieved with the
kernel config option by making the pci_slot module runtime
loadable with the PCI hotplug drivers only visiting your new
code when the pci_slot driver is loaded, although I think this
would be more difficult to implement.
Also, I notice that even with your current CONFIG_ACPI_PCI_SLOT
implementation your numerous PCI hotplug driver changes (except
for only two places in pci_hotplug_core.c where there is
`#ifndef CONFIG_ACPI_PCI_SLOT` and `#ifdef CONFIG_ACPI_PCI_SLOT`)
are _always_ exposed. So, even with CONFIG_ACPI_PCI_SLOT disabled
there is IMO a need for testing of the affected PCI hotplug drivers
on more than a small number of isolated systems.
The good news is that I was able to test your v3 changes
(w/2.6.24-rc3 source) on our x3850 today with 'acpiphp'
and, except for the above mentioned inability to run-time
include/exclude them, they seemed to work fine. The previous
boot-time ACPI error messages are gone and I was able to
successfully hot-remove and hot-add both PCI-X and PCIe
adapters.
Thanks,
Gary
--
Gary Hade
System x Enablement
IBM Linux Technology Center
503-578-4503 IBM T/L: 775-4503
[email protected]
http://www.ibm.com/linux/ltc
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
