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SubjectRe: [GIT PULL v2] Early boot SLAB for 2.6.31

* Ingo Molnar <mingo@elte.hu> wrote:

> * Ingo Molnar <mingo@elte.hu> wrote:
>
> > Hm, with this pulled on a testbox i'm still getting:
> >
> > [ 0.000000] Experimental hierarchical RCU init done.
> > [ 0.000000] NR_IRQS:4352 nr_irqs:256
> > [ 0.000000] ------------[ cut here ]------------
> > [ 0.000000] WARNING: at mm/bootmem.c:537 alloc_arch_preferred_bootmem+0x40/0x7e()
>
> Another testbox crashed on bootup. I'm collecting a serial log
> from it - config attached meanwhile.

We have a hard crash in the WP-protect code:

[ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...BUG: Int 14: CR2 ffcff000
[ 0.000000] EDI 00000188 ESI 00000ac7 EBP c17eaf9c ESP c17eaf8c
[ 0.000000] EBX 000014e0 EDX 0000000e ECX 01856067 EAX 00000001
[ 0.000000] err 00000003 EIP c10135b1 CS 00000060 flg 00010002
[ 0.000000] Stack: c17eafa8 c17fd410 c16747bc c17eafc4 c17fd7e5 000011fd f8616000 c18237cc
[ 0.000000] 00099800 c17bb000 c17eafec c17f1668 000001c5 c17f1322 c166e039 c1822bf0
[ 0.000000] c166e033 c153a014 c18237cc 00020800 c17eaff8 c17f106a 00020800 01ba5003
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip-02161-g7a74539-dirty #52203
[ 0.000000] Call Trace:
[ 0.000000] [<c15357c2>] ? printk+0x14/0x16
[ 0.000000] [<c10135b1>] ? do_test_wp_bit+0x19/0x23
[ 0.000000] [<c17fd410>] ? test_wp_bit+0x26/0x64
[ 0.000000] [<c17fd7e5>] ? mem_init+0x1ba/0x1d8
[ 0.000000] [<c17f1668>] ? start_kernel+0x164/0x2f7
[ 0.000000] [<c17f1322>] ? unknown_bootoption+0x0/0x19c
[ 0.000000] [<c17f106a>] ? __init_begin+0x6a/0x6f
(full bootlog attached)

Just a quick analysis from the place we crash (without looking into
any details): the WP test is the first time we really make use of
the MMU during bootup - crashes there are often a sign of messed up
pagetables, which is easy if the bootmem allocator is changed.

These patches needs more work.

Ingo

[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.30-tip-02161-g7a74539-dirty (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #52203 SMP Thu Jun 11 13:37:22 CEST 2009
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] NSC Geode by NSC
[ 0.000000] Cyrix CyrixInstead
[ 0.000000] Centaur CentaurHauls
[ 0.000000] Transmeta GenuineTMx86
[ 0.000000] Transmeta TransmetaCPU
[ 0.000000] UMC UMC UMC UMC
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
[ 0.000000] BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
[ 0.000000] BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
[ 0.000000] BIOS-e820: 0000000000100000 - 000000003fff0000 (usable)
[ 0.000000] BIOS-e820: 000000003fff0000 - 000000003fff3000 (ACPI NVS)
[ 0.000000] BIOS-e820: 000000003fff3000 - 0000000040000000 (ACPI data)
[ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
[ 0.000000] BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
[ 0.000000] console [earlyser0] enabled
[ 0.000000] debug: ignoring loglevel setting.
[ 0.000000] DMI 2.3 present.
[ 0.000000] last_pfn = 0x3fff0 max_arch_pfn = 0x100000
[ 0.000000] Warning only 894MB will be used.
[ 0.000000] Use a HIGHMEM enabled kernel.
[ 0.000000] initial memory mapped : 0 - 01c00000
[ 0.000000] init_memory_mapping: 0000000000000000-0000000037e16000
[ 0.000000] 0000000000 - 0000400000 page 4k
[ 0.000000] 0000400000 - 0037c00000 page 2M
[ 0.000000] 0037c00000 - 0037e16000 page 4k
[ 0.000000] kernel direct mapping tables up to 37e16000 @ 7000-c000
[ 0.000000] ACPI: RSDP 000f76f0 00014 (v00 Nvidia)
[ 0.000000] ACPI: RSDT 3fff3040 00034 (v01 Nvidia AWRDACPI 42302E31 AWRD 00000000)
[ 0.000000] ACPI: FACP 3fff30c0 00074 (v01 Nvidia AWRDACPI 42302E31 AWRD 00000000)
[ 0.000000] ACPI: DSDT 3fff3180 06264 (v01 NVIDIA AWRDACPI 00001000 MSFT 0100000E)
[ 0.000000] ACPI: FACS 3fff0000 00040
[ 0.000000] ACPI: SRAT 3fff9500 000A0 (v01 AMD HAMMER 00000001 AMD 00000001)
[ 0.000000] ACPI: MCFG 3fff9600 0003C (v01 Nvidia AWRDACPI 42302E31 AWRD 00000000)
[ 0.000000] ACPI: APIC 3fff9440 0007C (v01 Nvidia AWRDACPI 42302E31 AWRD 00000000)
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] 894MB LOWMEM available.
[ 0.000000] mapped low ram: 0 - 37e16000
[ 0.000000] low ram: 0 - 37e16000
[ 0.000000] node 0 low ram: 00000000 - 37e16000
[ 0.000000] node 0 bootmap 00008000 - 0000efc4
[ 0.000000] (8 early reservations) ==> bootmem [0000000000 - 0037e16000]
[ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]
[ 0.000000] #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000]
[ 0.000000] #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000]
[ 0.000000] #3 [0001000000 - 0001a04b14] TEXT DATA BSS ==> [0001000000 - 0001a04b14]
[ 0.000000] #4 [000009f800 - 0000100000] BIOS reserved ==> [000009f800 - 0000100000]
[ 0.000000] #5 [0001a05000 - 0001a0c149] BRK ==> [0001a05000 - 0001a0c149]
[ 0.000000] #6 [0000007000 - 0000008000] PGTABLE ==> [0000007000 - 0000008000]
[ 0.000000] #7 [0000008000 - 000000f000] BOOTMAP ==> [0000008000 - 000000f000]
[ 0.000000] Zone PFN ranges:
[ 0.000000] DMA 0x00000000 -> 0x00001000
[ 0.000000] Normal 0x00001000 -> 0x00037e16
[ 0.000000] Movable zone start PFN for each node
[ 0.000000] early_node_map[2] active PFN ranges
[ 0.000000] 0: 0x00000000 -> 0x0000009f
[ 0.000000] 0: 0x00000100 -> 0x00037e16
[ 0.000000] On node 0 totalpages: 228789
[ 0.000000] free_area_init_node: node 0, pgdat c17b2340, node_mem_map c1a0d000
[ 0.000000] DMA zone: 32 pages used for memmap
[ 0.000000] DMA zone: 0 pages reserved
[ 0.000000] DMA zone: 3967 pages, LIFO batch:0
[ 0.000000] Normal zone: 1757 pages used for memmap
[ 0.000000] Normal zone: 223033 pages, LIFO batch:31
[ 0.000000] Using APIC driver default
[ 0.000000] Nvidia board detected. Ignoring ACPI timer override.
[ 0.000000] If you got timer trouble try acpi_use_timer_override
[ 0.000000] ACPI: PM-Timer IO Port: 0x4008
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: BIOS IRQ0 pin2 override ignored.
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 14 global_irq 14 high edge)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 15 global_irq 15 high edge)
[ 0.000000] ACPI: IRQ9 used by override.
[ 0.000000] ACPI: IRQ14 used by override.
[ 0.000000] ACPI: IRQ15 used by override.
[ 0.000000] Enabling APIC mode: Flat. Using 1 I/O APICs
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs
[ 0.000000] mapped APIC to ffffb000 (fee00000)
[ 0.000000] mapped IOAPIC to ffffa000 (fec00000)
[ 0.000000] nr_irqs_gsi: 24
[ 0.000000] PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
[ 0.000000] PM: Registered nosave memory: 00000000000a0000 - 00000000000f0000
[ 0.000000] PM: Registered nosave memory: 00000000000f0000 - 0000000000100000
[ 0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:a0000000)
[ 0.000000] NR_CPUS:32 nr_cpumask_bits:32 nr_cpu_ids:2 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 16 pages at c2111000, static data 41948 bytes
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 227000
[ 0.000000] Kernel command line: root=/dev/sda1 earlyprintk=serial,ttyS0,115200,keep console=tty debug initcall_debug enforcing=0 apic=verbose ignore_loglevel sysrq_always_enabled selinux=0 nmi_watchdog=0 3 panic=1
[ 0.000000] debug: sysrq always enabled.
[ 0.000000] PID hash table entries: 4096 (order: 12, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Memory: 896604k/915544k available (5344k kernel code, 18420k reserved, 2759k data, 392k init, 0k highmem)
[ 0.000000] virtual kernel memory layout:
[ 0.000000] fixmap : 0xffe18000 - 0xfffff000 (1948 kB)
[ 0.000000] vmalloc : 0xf8616000 - 0xffe16000 ( 120 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xf7e16000 ( 894 MB)
[ 0.000000] .init : 0xc17f1000 - 0xc1853000 ( 392 kB)
[ 0.000000] .data : 0xc1538001 - 0xc17e9c20 (2759 kB)
[ 0.000000] .text : 0xc1000000 - 0xc1538001 (5344 kB)
[ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...BUG: Int 14: CR2 ffcff000
[ 0.000000] EDI 00000188 ESI 00000ac7 EBP c17eaf9c ESP c17eaf8c
[ 0.000000] EBX 000014e0 EDX 0000000e ECX 01856067 EAX 00000001
[ 0.000000] err 00000003 EIP c10135b1 CS 00000060 flg 00010002
[ 0.000000] Stack: c17eafa8 c17fd410 c16747bc c17eafc4 c17fd7e5 000011fd f8616000 c18237cc
[ 0.000000] 00099800 c17bb000 c17eafec c17f1668 000001c5 c17f1322 c166e039 c1822bf0
[ 0.000000] c166e033 c153a014 c18237cc 00020800 c17eaff8 c17f106a 00020800 01ba5003
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip-02161-g7a74539-dirty #52203
[ 0.000000] Call Trace:
[ 0.000000] [<c15357c2>] ? printk+0x14/0x16
[ 0.000000] [<c10135b1>] ? do_test_wp_bit+0x19/0x23
[ 0.000000] [<c17fd410>] ? test_wp_bit+0x26/0x64
[ 0.000000] [<c17fd7e5>] ? mem_init+0x1ba/0x1d8
[ 0.000000] [<c17f1668>] ? start_kernel+0x164/0x2f7
[ 0.000000] [<c17f1322>] ? unknown_bootoption+0x0/0x19c
[ 0.000000] [<c17f106a>] ? __init_begin+0x6a/0x6f
[ 0.000000] BUG: Int 14: CR2 (null)
[ 0.000000] EDI 00000188 ESI 00000ac7 EBP c17eaf9c ESP c17eaf50
[ 0.000000] EBX 000014e0 EDX 0000000e ECX c17eaf58 EAX (null)
[ 0.000000] err 00000002 EIP c100033a CS 00000060 flg 00010046
[ 0.000000] Stack: c1766036 0000000e ffcff000 00000188 00000ac7 c17eaf9c c17eaf8c 000014e0
[ 0.000000] 0000000e 01856067 00000001 00000003 c10135b1 00000060 00010002 c17eafa8
[ 0.000000] c17fd410 c16747bc c17eafc4 c17fd7e5 000011fd f8616000 c18237cc 00099800
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip-02161-g7a74539-dirty #52203
[ 0.000000] Call Trace:
[ 0.000000] [<c15357c2>] ? printk+0x14/0x16
[ 0.000000] [<c10135b1>] ? do_test_wp_bit+0x19/0x23
[ 0.000000] [<c17fd410>] ? test_wp_bit+0x26/0x64
[ 0.000000] [<c17fd7e5>] ? mem_init+0x1ba/0x1d8
[ 0.000000] [<c17f1668>] ? start_kernel+0x164/0x2f7
[ 0.000000] [<c17f1322>] ? unknown_bootoption+0x0/0x19c
[ 0.000000] [<c17f106a>] ? __init_begin+0x6a/0x6f



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