Re: Bisected regression (Was Re: current -git fails to boot onnehalem-ex)

From: Jens Axboe
Date: Thu Dec 10 2009 - 13:45:19 EST

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On Thu, Dec 10 2009, Yinghai Lu wrote:
> Yinghai Lu wrote:
> > Jens Axboe wrote:
> >> On Thu, Dec 10 2009, Yinghai wrote:
> >>>
> >>>
> >>> On Dec 10, 2009, at 8:06 AM, Ingo Molnar <mingo@xxxxxxx> wrote:
> >>>
> >>>> * Jens Axboe <jens.axboe@xxxxxxxxxx> wrote:
> >>>>
> >>>>> On Thu, Dec 10 2009, Jens Axboe wrote:
> >>>>>> Hi,
> >>>>>>
> >>>>>> As written in the subject, it just hard hangs before writing
> >>>>>> anything on
> >>>>>> the console. With earlyprintk, I captured the failure, see below.
> >>>>>>
> >>>>>> I'll try and bisect this, but it takes some time (since the bios and
> >>>>>> post process takes forever). I just updated the firmware on the
> >>>>>> box as
> >>>>>> well, but it did boot 2.6.32 (and RHEL5 boots fine too). Of course
> >>>>>> that
> >>>>>> doesn't rule out a BIOS bug.
> >>>>> Results are persistent, git bisect points to:
> >>>>>
> >>>>> commit b24c2a925a9837cccf54d50aeac22ba0cbc15455
> >>>>> Author: Yinghai Lu <yinghai@xxxxxxxxxx>
> >>>>> Date: Tue Nov 24 02:48:18 2009 -0800
> >>>>>
> >>>>> x86: Move find_smp_config() earlier and avoid bootmem usage
> >>>>>
> >>>>> which appears consistent with the panic(). Reverting that does indeed
> >>>>> make current -git boot properly.
> >>>> Thanks. Yinghai, do you have any ideas, or should we revert it?
> >>>>
> >>> Let find the root cause
> >>>
> >>> Jen
> >> Jens :-)
> >>
> >>> Can you boot with earlyconsole or earlyprintk and debug?
> >> The original report already included oops output from earlyprintk, it's
> >> below as well.
> >>
> >> kernel /vmlinuz-2.6 root=/dev/sda3 ro console=ttyS0,115200 console=tty0 earlyp
> >> rintk=serial,ttyS0,115200
> >> [Linux-bzImage, setup=0x3200, size=0x298f90]
> >>
> >>
> >> [ 0.000000] Linux version 2.6.32 (axboe@nehalem) (gcc version 4.3.2 (Debian 4.3.2-1.1) ) #35 SMP Thu Dec 10 09:47:51 CET 2009 *
> >> [ 0.000000] Command line: root=/dev/sda3 ro console=ttyS0,115200 console=tty0 earlyprintk=serial,ttyS0,115200 *
> >> [ 0.000000] BIOS-provided physical RAM map: *
> >> [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009a400 (usable) *
> >> [ 0.000000] BIOS-e820: 000000000009a400 - 00000000000a0000 (reserved) *
> >> [ 0.000000] BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)***
> >> [ 0.000000] BIOS-e820: 0000000000100000 - 0000000078c75000 (usable)
> >> [ 0.000000] BIOS-e820: 0000000078c75000 - 0000000078e89000 (ACPI NVS)
> >> [ 0.000000] BIOS-e820: 0000000078e89000 - 000000007924e000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 000000007924e000 - 00000000792c2000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000792c2000 - 00000000792d2000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 00000000792d2000 - 00000000792e7000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000792e7000 - 0000000079301000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079301000 - 0000000079303000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079303000 - 0000000079305000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079305000 - 0000000079310000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079310000 - 0000000079314000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079314000 - 0000000079319000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079319000 - 0000000079336000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079336000 - 0000000079358000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079358000 - 0000000079388000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079388000 - 00000000793c9000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000793c9000 - 000000007968f000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 000000007968f000 - 00000000796bb000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000796bb000 - 00000000799d8000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 00000000799d8000 - 0000000079bd8000 (ACPI NVS)
> >> [ 0.000000] BIOS-e820: 0000000079bd8000 - 0000000079dc7000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079dc7000 - 0000000079dcb000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079dcb000 - 0000000079e1c000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 0000000079e1c000 - 0000000079e87000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000079e87000 - 000000007bd5f000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 000000007bd5f000 - 000000007be4f000 (reserved)
> >> [ 0.000000] BIOS-e820: 000000007be4f000 - 000000007bf87000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 000000007bf87000 - 000000007bfcf000 (ACPI NVS)
> >> [ 0.000000] BIOS-e820: 000000007bfcf000 - 000000007bfff000 (ACPI data)
> >> [ 0.000000] BIOS-e820: 000000007bfff000 - 0000000090000000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000fc000000 - 00000000fd000000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000fed1c000 - 00000000fed20000 (reserved)
> >> [ 0.000000] BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)
> >> [ 0.000000] BIOS-e820: 0000000100000000 - 0000001080000000 (usable)
> >> [ 0.000000] bootconsole [earlyser0] enabled
> >> [ 0.000000] NX (Execute Disable) protection: active
> >> [ 0.000000] DMI 2.5 present.
> >> [ 0.000000] last_pfn = 0x1080000 max_arch_pfn = 0x400000000
> >> [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
> >> [ 0.000000] last_pfn = 0x78c75 max_arch_pfn = 0x400000000
> >> [ 0.000000] init_memory_mapping: 0000000000000000-0000000078c75000
> >> [ 0.000000] init_memory_mapping: 0000000100000000-0000001080000000
> >> [ 0.000000] ACPI: RSDP 00000000000f0410 00024 (v02 QUANTA)
> >> [ 0.000000] ACPI: XSDT 000000007bffe120 000BC (v01 QUANTA QSSC-S4R 00000000 01000013)
> >> [ 0.000000] ACPI: FACP 000000007bffd000 000F4 (v04 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: DSDT 000000007bfe3000 19BAD (v02 QUANTA QSSC-S4R 00000003 MSFT 0100000D)
> >> [ 0.000000] ACPI: FACS 000000007bf87000 00040
> >> [ 0.000000] ACPI: APIC 000000007bfe2000 003E4 (v02 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: MSCT 000000007bfe1000 00090 (v01 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] ACPI: MCFG 000000007bfe0000 0003C (v01 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] ACPI: HPET 000000007bfdf000 00038 (v01 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] ACPI: SLIT 000000007bfde000 0003C (v01 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] ACPI: SRAT 000000007bfdd000 00930 (v02 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] ACPI: SPCR 000000007bfdc000 00050 (v01 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: WDDT 000000007bfdb000 00040 (v01 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: SSDT 000000007bf4a000 3CFA4 (v02 QUANTA QSSC-S4R 00004000 INTL 20061109)
> >> [ 0.000000] ACPI: SSDT 000000007bfda000 00174 (v02 QUANTA QSSC-S4R 00004000 INTL 20061109)
> >> [ 0.000000] ACPI: PMCT 000000007bfd9000 00064 (v01 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: MIGT 000000007bfd8000 00040 (v01 QUANTA QSSC-S4R 00000000 MSFT 0100000D)
> >> [ 0.000000] ACPI: TCPA 000000007bfd5000 00032 (v00 QUANTA QSSC-S4R 00000000 00000000)
> >> [ 0.000000] ACPI: HEST 000000007bfd4000 005D0 (v01 QUANTA QSSC-S4R 00000001 INTL 00000001)
> >> [ 0.000000] ACPI: BERT 000000007bfd3000 00030 (v01 QUANTA QSSC-S4R 00000001 INTL 00000001)
> >> [ 0.000000] ACPI: ERST 000000007bfd2000 00230 (v01 QUANTA QSSC-S4R 00000001 INTL 00000001)
> >> [ 0.000000] ACPI: EINJ 000000007bfd1000 00130 (v01 QUANTA QSSC-S4R 00000001 INTL 00000001)
> >> [ 0.000000] ACPI: DMAR 000000007bfd0000 00350 (v01 QUANTA QSSC-S4R 00000001 MSFT 0100000D)
> >> [ 0.000000] found SMP MP-table at [ffff8800000fdd80] fdd80
> >> [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 0-fff BIOS data page
> >
> > mptable mpc is [12 - f011]
> >
> > what a BIOS !
> >
> > can you check if it works with 2.6.32 + "acpi=off"?

I'll try that.

> please check if this one could workaround it.
>
> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> index d17d482..f60acec 100644
> --- a/arch/x86/kernel/e820.c
> +++ b/arch/x86/kernel/e820.c
> @@ -732,7 +732,7 @@ struct early_res {
> char overlap_ok;
> };
> static struct early_res early_res[MAX_EARLY_RES] __initdata = {
> - { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
> + { 0, PAGE_SIZE, "BIOS data page", 1 }, /* BIOS data page */
> {}
> };

And then this. Results in 10-15min.

--
Jens Axboe

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