Date:	Sat, 26 Mar 2011 12:27:25 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Lameter <cl@...ux.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	tj@...nel.org, npiggin@...nel.dk, rientjes@...gle.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [boot crash #2] Re: [GIT PULL] SLAB changes for v2.6.39-rc1


ok, bad news - the bootcrash has come back - see the crashlog attached below. 
Config attached as well.

I reproduced this on upstream 16c29dafcc86 - i.e. all the latest Slab fixes 
applied.

Thanks,

	Ingo

------------------->
Linux version 2.6.38-08569-g16c29da (mingo@...ius) (gcc version 4.6.0 20110304 (Red Hat 4.6.0-0.12) (GCC) ) #110593 Sat Mar 26 13:46:21 CET 2011
Command line: root=/dev/sda6 earlyprintk=ttyS0,115200 console=ttyS0,115200 debug initcall_debug sysrq_always_enabled ignore_loglevel selinux=0 nmi_watchdog=1 panic=1 3
KERNEL supported cpus:
  Intel GenuineIntel
  AMD AuthenticAMD
  Centaur CentaurHauls
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
 BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000003fff0000 (usable)
 BIOS-e820: 000000003fff0000 - 000000003fff3000 (ACPI NVS)
 BIOS-e820: 000000003fff3000 - 0000000040000000 (ACPI data)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
bootconsole [earlyser0] enabled
debug: ignoring loglevel setting.
NX (Execute Disable) protection: active
DMI 2.3 present.
DMI: System manufacturer System Product Name/A8N-E, BIOS ASUS A8N-E ACPI BIOS Revision 1008 08/22/2005
e820 update range: 0000000000000000 - 0000000000010000 (usable) ==> (reserved)
e820 remove range: 00000000000a0000 - 0000000000100000 (usable)
last_pfn = 0x3fff0 max_arch_pfn = 0x400000000
MTRR default type: uncachable
MTRR fixed ranges enabled:
  00000-9FFFF write-back
  A0000-BFFFF uncachable
  C0000-C7FFF write-protect
  C8000-FFFFF uncachable
MTRR variable ranges enabled:
  0 base 0000000000 mask FFC0000000 write-back
  1 disabled
  2 disabled
  3 disabled
  4 disabled
  5 disabled
  6 disabled
  7 disabled
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
found SMP MP-table at [ffff8800000f5680] f5680
initial memory mapped : 0 - 20000000
Base memory trampoline at [ffff88000009d000] 9d000 size 8192
init_memory_mapping: 0000000000000000-000000003fff0000
 0000000000 - 003fe00000 page 2M
 003fe00000 - 003fff0000 page 4k
kernel direct mapping tables up to 3fff0000 @ 3ffed000-3fff0000
 [ffffea0000000000-ffffea0000dfffff] PMD -> [ffff88003e600000-ffff88003f3fffff] on node 0
Zone PFN ranges:
  DMA      0x00000010 -> 0x00001000
  DMA32    0x00001000 -> 0x00100000
  Normal   empty
Movable zone start PFN for each node
early_node_map[2] active PFN ranges
    0: 0x00000010 -> 0x0000009f
    0: 0x00000100 -> 0x0003fff0
On node 0 totalpages: 262015
  DMA zone: 56 pages used for memmap
  DMA zone: 2 pages reserved
  DMA zone: 3925 pages, LIFO batch:0
  DMA32 zone: 3528 pages used for memmap
  DMA32 zone: 254504 pages, LIFO batch:31
SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
Intel MultiProcessor Specification v1.4
MPTABLE: OEM ID: OEM00000
MPTABLE: Product ID: PROD00000000
MPTABLE: APIC at: 0xFEE00000
Processor #0 (Bootup-CPU)
Processor #1
ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 1/0x1 ignored.
IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
Processors: 1
nr_irqs_gsi: 40
Allocating PCI resources starting at 40000000 (gap: 40000000:a0000000)
Booting paravirtualized kernel on bare hardware
pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
pcpu-alloc: [0] 0 
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 258429
Kernel command line: root=/dev/sda6 earlyprintk=ttyS0,115200 console=ttyS0,115200 debug initcall_debug sysrq_always_enabled ignore_loglevel selinux=0 nmi_watchdog=1 panic=1 3
sysrq: sysrq always enabled.
PID hash table entries: 4096 (order: 3, 32768 bytes)
Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
Memory: 1011352k/1048512k available (11595k kernel code, 452k absent, 36708k reserved, 6343k data, 1024k init)
BUG: unable to handle kernel paging request at ffff87ffc1fdd020
IP: [<ffffffff812b50c2>] this_cpu_cmpxchg16b_emu+0x2/0x1c
PGD 0 
Oops: 0000 [#1] 
last sysfs file: 
CPU 0 
Pid: 0, comm: swapper Not tainted 2.6.38-08569-g16c29da #110593 System manufacturer System Product Name/A8N-E
RIP: 0010:[<ffffffff812b50c2>]  [<ffffffff812b50c2>] this_cpu_cmpxchg16b_emu+0x2/0x1c
RSP: 0000:ffffffff82003e78  EFLAGS: 00010086
RAX: ffff88003f8020c0 RBX: ffff88003f802180 RCX: 0000000000000002
RDX: 0000000000000001 RSI: ffff88003ffc2020 RDI: ffffffff8219be43
RBP: ffffffff82003ed8 R08: 0000000000000000 R09: ffffea0000de40d0
R10: ffffffff821666b0 R11: ffffffff821666b0 R12: ffff88003f8020c0
R13: ffff88003f802000 R14: ffffffffffffffff R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffffffff8201b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff87ffc1fdd020 CR3: 000000000200b000 CR4: 00000000000006b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffffffff82002000, task ffffffff82015300)
Stack:
 0000000000000086 ffffffff810dcd03 ffffffffffffffff 0000000000093e30
 ffffffff82003ef8 0000000000000000 00000000000000c0 0000000000000000
 ffff88003f800000 ffff88003f8000c0 ffffffffffffffff 0000000000093e30
Call Trace:
 [<ffffffff810dcd03>] ? kmem_cache_alloc+0x53/0x130
 [<ffffffff8219be43>] kmem_cache_init+0xeb/0x2b0
 [<ffffffff821869eb>] start_kernel+0x1cb/0x322
 [<ffffffff82186338>] x86_64_start_reservations+0xfe/0x102
 [<ffffffff82186140>] ? early_idt_handlers+0x140/0x140
 [<ffffffff82186409>] x86_64_start_kernel+0xcd/0xdc
Code: 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 90 90 90 90 90 90 90 9c fa 
 48 3b 06 75 14 65 48 3b 56 08 75 0d 65 48 89 1e 65 48 89 4e 
RIP  [<ffffffff812b50c2>] this_cpu_cmpxchg16b_emu+0x2/0x1c
 RSP <ffffffff82003e78>
CR2: ffff87ffc1fdd020
---[ end trace a7919e7f17c0a725 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
Pid: 0, comm: swapper Tainted: G      D     2.6.38-08569-g16c29da #110593
Call Trace:
 [<ffffffff81b23b97>] panic+0x91/0x18c
 [<ffffffff81042ce3>] do_exit+0x323/0x340
 [<ffffffff81005786>] oops_end+0x96/0xe0
 [<ffffffff81b233a5>] no_context+0x141/0x14e
 [<ffffffff81b2353d>] __bad_area_nosemaphore+0x18b/0x1ae
 [<ffffffff81b23573>] bad_area_nosemaphore+0x13/0x15
 [<ffffffff8101f561>] do_page_fault+0x2a1/0x4b0
 [<ffffffff810b1703>] ? get_page_from_freelist+0x1a3/0x3d0
 [<ffffffff810c3089>] ? pcpu_chunk_slot+0x9/0x50
 [<ffffffff81b4f6a5>] page_fault+0x25/0x30
 [<ffffffff8219be43>] ? kmem_cache_init+0xeb/0x2b0
 [<ffffffff812b50c2>] ? this_cpu_cmpxchg16b_emu+0x2/0x1c
 [<ffffffff810dcd03>] ? kmem_cache_alloc+0x53/0x130
 [<ffffffff8219be43>] kmem_cache_init+0xeb/0x2b0
 [<ffffffff821869eb>] start_kernel+0x1cb/0x322
 [<ffffffff82186338>] x86_64_start_reservations+0xfe/0x102
 [<ffffffff82186140>] ? early_idt_handlers+0x140/0x140
 [<ffffffff82186409>] x86_64_start_kernel+0xcd/0xdc
Rebooting in 1 seconds..

View attachment "config" of type "text/plain" (69621 bytes)

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