linux-kernel - [2.6.24-rc8-mm1] Locking API boot-time self-tests hangs.

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Date:	Fri, 18 Jan 2008 10:20:11 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org
Subject: [2.6.24-rc8-mm1] Locking API boot-time self-tests hangs.

Hello.

I found the CONFIG_DEBUG_LOCKING_API_SELFTESTS hangs
at (A-A deadlock)-(wlock) pair.

2.6.24-rc8 doesn't hang.
So, I think the bug is in 2.6.24-rc8-mm1.bz2 .

The kernel configs are at

  http://I-love.SAKURA.ne.jp/tmp/config-2.6.24-rc8
  http://I-love.SAKURA.ne.jp/tmp/config-2.6.24-rc8-mm1

Regards.

---------- 2.6.24-rc8-mm1 ----------
Linux version 2.6.24-rc8-mm1 (root@...oyo) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #2 SMP Fri Jan 18 10:13:09 JST 2008
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
 BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved)
 BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001fef0000 (usable)
 BIOS-e820: 000000001fef0000 - 000000001feff000 (ACPI data)
 BIOS-e820: 000000001feff000 - 000000001ff00000 (ACPI NVS)
 BIOS-e820: 000000001ff00000 - 0000000020000000 (usable)
 BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
512MB LOWMEM available.
found SMP MP-table at 000f6c90
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->   131072
  HighMem    131072 ->   131072
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0:        0 ->   131072
DMI present.
Intel MultiProcessor Specification v1.4
    Virtual Wire compatibility mode.
OEM ID: INTEL    Product ID: 440BX        APIC at: 0xFEE00000
Processor #0 6:15 APIC version 17
Processor #1 6:15 APIC version 17
I/O APIC #2 Version 17 at 0xFEC00000.
Enabling APIC mode:  Flat.  Using 1 I/O APICs
Processors: 2
Allocating PCI resources starting at 30000000 (gap: 20000000:dec00000)
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: root=/dev/sda1 ro noapic nolapic console=ttyS0,115200n8
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c0523000 soft=c0521000
PID hash table entries: 2048 (order: 11, 8192 bytes)
Detected 1993.105 MHz processor.
Console: colour VGA+ 80x25
console [ttyS0] enabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:    8
... MAX_LOCK_DEPTH:          30
... MAX_LOCKDEP_KEYS:        2048
... CLASSHASH_SIZE:           1024
... MAX_LOCKDEP_ENTRIES:     8192
... MAX_LOCKDEP_CHAINS:      16384
... CHAINHASH_SIZE:          8192
 memory used by lock dependency info: 1024 kB
 per task-struct memory footprint: 1680 bytes
------------------------
| Locking API testsuite:
----------------------------------------------------------------------------
                                 | spin |wlock |rlock |mutex | wsem | rsem |
  --------------------------------------------------------------------------
                     A-A deadlock:  ok  |

---------- 2.6.24-rc8 ----------
Linux version 2.6.24-rc8 (root@...oyo) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #1 SMP Fri Jan 18 09:51:40 JST 2008
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
 BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved)
 BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001fef0000 (usable)
 BIOS-e820: 000000001fef0000 - 000000001feff000 (ACPI data)
 BIOS-e820: 000000001feff000 - 000000001ff00000 (ACPI NVS)
 BIOS-e820: 000000001ff00000 - 0000000020000000 (usable)
 BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
512MB LOWMEM available.
found SMP MP-table at 000f6c90
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->   131072
  HighMem    131072 ->   131072
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0:        0 ->   131072
DMI present.
Intel MultiProcessor Specification v1.4
    Virtual Wire compatibility mode.
OEM ID: INTEL    Product ID: 440BX        APIC at: 0xFEE00000
Processor #0 6:15 APIC version 17
Processor #1 6:15 APIC version 17
I/O APIC #2 Version 17 at 0xFEC00000.
Enabling APIC mode:  Flat.  Using 1 I/O APICs
Processors: 2
Allocating PCI resources starting at 30000000 (gap: 20000000:dec00000)
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: root=/dev/sda1 ro noapic nolapic console=ttyS0,115200n8
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c052c000 soft=c052a000
PID hash table entries: 2048 (order: 11, 8192 bytes)
Detected 1994.813 MHz processor.
Console: colour VGA+ 80x25
console [ttyS0] enabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:    8
... MAX_LOCK_DEPTH:          30
... MAX_LOCKDEP_KEYS:        2048
... CLASSHASH_SIZE:           1024
... MAX_LOCKDEP_ENTRIES:     8192
... MAX_LOCKDEP_CHAINS:      16384
... CHAINHASH_SIZE:          8192
 memory used by lock dependency info: 1024 kB
 per task-struct memory footprint: 1680 bytes
------------------------
| Locking API testsuite:
----------------------------------------------------------------------------
                                 | spin |wlock |rlock |mutex | wsem | rsem |
  --------------------------------------------------------------------------
                     A-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
--
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