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    SubjectRe: [PATCH 0/4, v3] Physical PCI slot objects
    On Tue, Nov 27, 2007 at 11:11:36AM -0800, Kristen Carlson Accardi wrote:
    > On Mon, 26 Nov 2007 19:04:54 -0800
    > Gary Hade <> wrote:
    > > > Is this patchset appropriate for the -mm tree yet?
    > >
    > > I would defer to our illustrious maintainers on this one. :)
    > >
    > > > Or do you think it still needs more work?
    > >
    > > I am now much more comfortable with your changes with respect
    > > to acpiphp on the systems I worry about but others may have
    > > concerns with respect to the other hotplug drivers, or even
    > > acpiphp, on other systems.
    > I'm ok with adding it to my quilt tree (and into -mm) after Gary gets
    > back to us later this week.

    I'm getting back to you but unfortunately with not so good
    news. Sorry Alex.

    On the x3950 (configured single node) I encountered the below
    problem when attempting to hotplug a PCIe adapter when 'pci_slot'
    was loaded prior to 'acpiphp'. I did not see the problem when
    the drivers were loaded in the opposite order.

    After the messages appeared, the hotplug operation did not
    complete and I was unable to recover hotplug functionality
    without a reboot. I attempted recovery by unloading both
    drivers and then reloading only 'acpiphp' but even though
    an LED for the slot that had received the problem triggering
    adapter indicated that the slot was receiving power, the
    sysfs slot power file indicated otherwise (contained 0).
    So, I was unable to power off the slot to allow the removal
    and reinsertion of the adapter.

    FYI, the node contains 2 hotpluggable PCIe slots and 5
    non-hotpluggable PCIe slots but 'pci_slot' only exposed
    the 2 hotpluggable slots. This does not appear to be due
    to a 'pci_slot' driver problem since I looked at the DSDT
    and SSDT and found that there are currently no _SUN methods
    for the non-hotpluggable slots.


    Gary Hade
    System x Enablement
    IBM Linux Technology Center
    503-578-4503 IBM T/L: 775-4503

    invalid opcode: 0000 [1] SMP
    CPU 1
    Modules linked in: acpiphp pci_slot e1000 aic79xx scsi_transport_spi shpchp dock pci_hotplug ipt_LOG xt_limit xt_pkttype button battery ac power_supply ip6t_REJECT xt_tcpudp ipt_REJECT iptable_mangle iptable_filter ip6table_mangle ip_tables ip6table_filter ip6_tables x_tables ipv6 usbhid ff_memless ext3 jbd loop dm_mod ehci_hcd uhci_hcd usbcore ide_cd bnx2 cdrom rng_core reiserfs ata_piix ahci libata thermal processor piix sg megaraid_sas fan edd sd_mod scsi_mod ide_disk ide_core
    Pid: 121, comm: kacpi_notify Not tainted 2.6.24-rc3-gh-smp #1
    RIP: 0010:[<ffffffff882c2344>] [<ffffffff882c2344>] :pci_slot:__this_module+0x21c4/0xfffffffffffff204
    RSP: 0018:ffff81103fa43ea8 EFLAGS: 00010216
    RAX: ffff81103f944a18 RBX: ffff81103d4fe910 RCX: 000000000000000f
    RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8110400d13d0
    RBP: ffffffff8032d97b R08: ffff8110400fc7e0 R09: 0000000000000002
    R10: 0000000000000000 R11: ffffffff8021d193 R12: ffff811040105cf0
    R13: ffffffffffffffff R14: ffffffff80635820 R15: 0000000000000000
    FS: 0000000000000000(0000) GS:ffff8110400ed8c0(0000) knlGS:0000000000000000
    CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    CR2: 00002b266d876471 CR3: 000000103c825000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process kacpi_notify (pid: 121, threadinfo ffff81103fa42000, task ffff81103f9f8040)
    Stack: ffffffff8033339c ffff81103d119a00 ffffffff8032d99e ffff81103f9fc540
    ffffffff8024618d ffff81103f9fc540 ffff81103f9fc540 ffffffff8024696c
    ffffffff80246a46 0000000000000000 ffff81103f9f8040 ffffffff80249ada
    Call Trace:
    [<ffffffff8033339c>] acpi_ev_notify_dispatch+0x57/0x60
    [<ffffffff8032d99e>] acpi_os_execute_notify+0x23/0x2c
    [<ffffffff8024618d>] run_workqueue+0x7f/0x10b
    [<ffffffff8024696c>] worker_thread+0x0/0xe4
    [<ffffffff80246a46>] worker_thread+0xda/0xe4
    [<ffffffff80249ada>] autoremove_wake_function+0x0/0x2e
    [<ffffffff802499bc>] kthread+0x47/0x73
    [<ffffffff8020cc98>] child_rip+0xa/0x12
    [<ffffffff80249975>] kthread+0x0/0x73
    [<ffffffff8020cc8e>] child_rip+0x0/0x12

    Code: ff ff ff ff 40 23 2c 88 ff ff ff ff 00 c8 c6 3b 10 81 ff ff
    RIP [<ffffffff882c2344>] :pci_slot:__this_module+0x21c4/0xfffffffffffff204
    RSP <ffff81103fa43ea8>

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