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Date: Mon, 19 Apr 2010 18:53:37 +0530
Message-ID: <o2p9bde694e1004190623n24a4308le84451cc076d4a46@mail.gmail.com>
Subject: Kmemcheck issue
From: naveen yadav <yad.naveen@gmail.com>
To: linux-arm-kernel-request@lists.arm.linux.org.uk,
       linux newbie <linux.newbie79@gmail.com>, linux-kernel@vger.kernel.org
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Hi,

? ? ? I ?am ?trying to ? run ?Kmemcheck on ? a ?Cortex ( ARM-v7)
board ?running ?Linux 2.6.30.9

At boot-up time, ?as ?soon ?as ?Timer-device is ?enabled, ? I ?find
that ? timer ?gets ?disabled ?because ?system
gets spurious ?interrupts ?on ?that ?irq ?line.


PID hash table entries: 1024 (order: 10, 4096 bytes)
Linux System timer initialize
irq 23: nobody cared (try booting with the "irqpoll" option)
[<c002e148>] (unwind_backtrace+0x0/0xe8) from [<c002c4b8>]
(dump_stack+0x18/0x1c)
[<c002c4b8>] (dump_stack+0x18/0x1c) from [<c006ad74>]
(__report_bad_irq+0x80/0xb0)
[<c006ad74>] (__report_bad_irq+0x80/0xb0) from [<c006af28>]
(note_interrupt+0x184/0x1f0)
[<c006af28>] (note_interrupt+0x184/0x1f0) from [<c006ba38>]
(handle_edge_irq+0xe8/0x160)
[<c006ba38>] (handle_edge_irq+0xe8/0x160) from [<c0027060>]
(asm_do_IRQ+0x60/0x74)
[<c0027060>] (asm_do_IRQ+0x60/0x74) from [<c0027a30>] (__irq_svc+0x30/0x80)
Exception stack(0xc0373ec0 to 0xc0373f08)
3ec0: 00000017 c0372000 00000002 00000000 00000002 c038e8f4 00000000 0aa00000
3ee0: c0372000 c03bfc40 0000001f c0373f44 00000100 c0373f08 c0047ffc c0047c98
3f00: 20000153 ffffffff
[<c0027a30>] (__irq_svc+0x30/0x80) from [<c0047ffc>] (irq_exit+0x44/0x4c)
[<c0047ffc>] (irq_exit+0x44/0x4c) from [<c0047ffc>] (irq_exit+0x44/0x4c)
[<c0047ffc>] (irq_exit+0x44/0x4c) from [<c0027064>] (asm_do_IRQ+0x64/0x74)
[<c0027064>] (asm_do_IRQ+0x64/0x74) from [<c0027a30>] (__irq_svc+0x30/0x80)
Exception stack(0xc0373f78 to 0xc0373fc0)
3f60: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 00000000 c037c15c
3f80: 00000001 600001d3 955fffff c00242ec c0399f80 0aa00000 c0023000 412fc082
3fa0: 0000001f c0373ff4 c0373fc0 c0373fc0 c0008974 c0019798 20000153 ffffffff
[<c0027a30>] (__irq_svc+0x30/0x80) from [<c0008974>] (start_kernel+0x168/0x3e4)
[<c0008974>] (start_kernel+0x168/0x3e4) from [<60008034>] (0x60008034)
handlers:
[<c003a604>] (sdp_timer_interrupt+0x0/0x38)
Disabling IRQ #23
Console: colour dummy device 80x30
console [ttyS1] enabled
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)


Later, ?when ?calibrating delay ?loop, ?the system is hung ?as timer
is not working.

The problem happens ?even if ?I ?set kmemcheck_enabled = 0 at ?boot.
( I also commented out ? ? pagetable_init(&meminfo) ?).

?If ?you have seen this before, ?please let me know.

( I know that ?your patch was written for ? ARM v6. ? ? My cpu is
Cortex . ? ?I am aware that ?I may have to make some change in the
?instruction simulation handling. )

Thanks
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