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Date: Sun, 8 Mar 2009 11:54:10 +0100 From: Ingo Molnar <mingo@...e.hu> To: Yinghai Lu <yinghai@...nel.org> Cc: Daniel Yeisley <dan.yeisley@...sys.com>, mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org, stable@...nel.org, tglx@...utronix.de, linux-pci@...r.kernel.org Subject: Re: [tip:x86/apic] x86: MSI: check for BIOS assigned addresses * Yinghai Lu <yinghai@...nel.org> wrote: > Ingo Molnar wrote: > > * Daniel Yeisley <dan.yeisley@...sys.com> wrote: > > > >> On Fri, 2009-03-06 at 19:45 +0100, Ingo Molnar wrote: > >>> * Daniel Yeisley <dan.yeisley@...sys.com> wrote: > >>> > >>>> Commit-ID: affd49d36e2e2df4cbb3e07a57db901c23823b6a > >>>> Gitweb: http://git.kernel.org/tip/affd49d36e2e2df4cbb3e07a57db901c23823b6a > >>>> Author: "Daniel Yeisley" <dan.yeisley@...sys.com> > >>>> AuthorDate: Fri, 6 Mar 2009 10:11:49 -0500 > >>>> Commit: Ingo Molnar <mingo@...e.hu> > >>>> CommitDate: Fri, 6 Mar 2009 19:32:44 +0100 > >>>> > >>>> x86: MSI: check for BIOS assigned addresses > >>>> > >>>> Impact: fix ACPI hotplug on certain systems > >>> Note, this commit means that i moved the commit over from > >>> tip:x86/urgent into tip:x86/apic - i.e. with a 2.6.30 merge > >>> date. When exactly was this regression introduced? I think this > >>> code never really accepted the MSI settings from the firmware, > >>> so changing that behavior might affect a lot of systems. > >>> > >>> So i'm uneasy about applying this fix this late in the .29 > >>> cycle, but marked it for -stable backport so it could hit > >>> 2.6.29.1 if it stays problem-free. > >>> > >>> Ingo > >> I initially noticed the problem on a 2.6.18 kernel. ACPI > >> hotplugging didn't work unless I booted with pci=nomsi. I > >> don't have a problem with waiting until 2.6.30 to make sure it > >> is thoroughly tested. > > > > Okay - so it's an ancient bug. The current track should thus be > > fine. > > > > please drop this patch. it seems it break msi-x. > at least igbe with msi-x does not work anymore. Not just that, it also causes bootup crashes - attached below. I'v dropped the patch for now. Ingo [ 4.276015] calling pcie_portdrv_init+0x0/0x4c @ 1 [ 4.280343] bus: 'pci_express': registered [ 4.284017] bus: 'pci': add driver pcieport-driver [ 4.288046] bus: 'pci': driver_probe_device: matched device 0000:00:0b.0 with driver pcieport-driver [ 4.292014] bus: 'pci': really_probe: probing driver pcieport-driver with device 0000:00:0b.0 [ 4.296148] pcieport-driver 0000:00:0b.0: setting latency timer to 64 [ 4.304157] alloc irq_desc for 16 on cpu 0 node 0 [ 4.308008] alloc kstat_irqs on cpu 0 node 0 [ 4.308124] ------------[ cut here ]------------ [ 4.312008] kernel BUG at arch/x86/kernel/apic/io_apic.c:1362! [ 4.312008] invalid opcode: 0000 [#1] SMP [ 4.312008] last sysfs file: [ 4.312008] CPU 0 [ 4.312008] Modules linked in: [ 4.312008] Pid: 7, comm: work_on_cpu/0 Not tainted 2.6.29-rc7-tip-02101-g8d7adfc-dirty #31737 SMP Sun Mar 8 11:50:18 CET 2009 System Product Name [ 4.312008] RIP: 0010:[<ffffffff80221e36>] [<ffffffff80221e36>] __clear_irq_vector+0x1d/0xd8 [ 4.312008] RSP: 0018:ffff88003f121bf0 EFLAGS: 00010046 [ 4.312008] RAX: 0000000000000246 RBX: ffff88003ea0b1a0 RCX: 0000000000000002 [ 4.312008] RDX: 8c6318c6318c6300 RSI: ffff88003ea0b1a0 RDI: 0000000000000010 [ 4.312008] RBP: ffff88003f121c10 R08: ffff88003f118998 R09: 0000000000000070 [ 4.312008] R10: 0000000000000000 R11: ffffffff80222c03 R12: 0000000000000010 [ 4.312008] R13: 0000000000000010 R14: ffff88003f2a31b0 R15: 0000000000000001 [ 4.312008] FS: 0000000000000000(0000) GS:ffff8800035b0000(0000) knlGS:0000000000000000 [ 4.312008] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 4.312008] CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0 [ 4.312008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 4.312008] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 4.312008] Process work_on_cpu/0 (pid: 7, threadinfo ffff88003f120000, task ffff88003f118000) [ 4.312008] Stack: [ 4.312008] 0000000000000246 0000000000000010 ffff88003ea0b1a0 ffff88003f2a31b0 [ 4.312008] ffff88003f121c40 ffffffff80222c11 ffff88003f121c50 ffff88003ea060a8 [ 4.312008] ffff88003f2a38b0 ffff88003f2a38b0 ffff88003f121c50 ffffffff80222c36 [ 4.312008] Call Trace: [ 4.312008] [<ffffffff80222c11>] destroy_irq+0x4f/0x66 [ 4.312008] [<ffffffff80222c36>] arch_teardown_msi_irq+0xe/0x10 [ 4.312008] [<ffffffff80471099>] arch_teardown_msi_irqs+0x2c/0xa3 [ 4.312008] [<ffffffff80471188>] msi_free_irqs+0x5d/0xff [ 4.312008] [<ffffffff80471a8f>] msi_capability_init+0x134/0x16d [ 4.312008] [<ffffffff8047202e>] pci_enable_msi+0x7c/0x82 [ 4.312008] [<ffffffff804707ff>] assign_interrupt_mode+0xda/0x10b [ 4.312008] [<ffffffff80470a0d>] pcie_port_device_register+0xb3/0x123 [ 4.312008] [<ffffffff80260f9c>] ? do_work_for_cpu+0x0/0x20 [ 4.312008] [<ffffffff807e10af>] pcie_portdrv_probe+0x8c/0xb4 [ 4.312008] [<ffffffff8046baee>] local_pci_probe+0x17/0x1b [ 4.312008] [<ffffffff80260fb4>] do_work_for_cpu+0x18/0x20 [ 4.312008] [<ffffffff80261492>] run_workqueue+0x10c/0x221 [ 4.312008] [<ffffffff80261440>] ? run_workqueue+0xba/0x221 [ 4.312008] [<ffffffff802611b5>] ? test_ti_thread_flag+0x9/0x11 [ 4.312008] [<ffffffff80262282>] worker_thread+0xd6/0xe7 [ 4.312008] [<ffffffff802658b8>] ? autoremove_wake_function+0x0/0x3d [ 4.312008] [<ffffffff802621ac>] ? worker_thread+0x0/0xe7 [ 4.312008] [<ffffffff802656d3>] kthread+0x4e/0x7b [ 4.312008] [<ffffffff80c54140>] ? early_idt_handler+0x0/0x73 [ 4.312008] [<ffffffff8020d1ca>] child_rip+0xa/0x20 [ 4.312008] [<ffffffff8020cb90>] ? restore_args+0x0/0x30 [ 4.312008] [<ffffffff80265685>] ? kthread+0x0/0x7b [ 4.312008] [<ffffffff8020d1c0>] ? child_rip+0x0/0x20 [ 4.312008] Code: ff 8b 35 2e 78 a1 00 e8 cd ff ff ff c9 c3 55 48 89 e5 41 56 41 55 41 54 53 e8 97 9f fe ff 8a 56 1c 41 89 fd 48 89 f3 84 d2 75 04 <0f> 0b eb fe 0f b6 d2 4c 8b 35 d4 b1 5f 00 48 c7 c0 20 b0 00 00 [ 4.312008] RIP [<ffffffff80221e36>] __clear_irq_vector+0x1d/0xd8 [ 4.312008] RSP <ffff88003f121bf0> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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