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Subjectkernel panic with anticipatory i/o scheduler 2.5.59-mm8
Date
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Hash: SHA1

Tried to run contest on 2.5.59-mm8 with the anticipatory i/o scheduler out of
the experimental directory patched in and got this:

Unable to handle kernel NULL pointer dereference at virtual address 00000016
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0060:[<c0263ea0>] Not tainted
EFLAGS: 00010046
EIP is at ide_multwrite+0xa0/0x100
eax: 00000000 ebx: 00000001 ecx: ce5fb000 edx: 00000000
esi: c12a2da4 edi: 00000008 ebp: 00000008 esp: cd167c1c
ds: 007b es: 007b ss: 0068
Process contest (pid: 2171, threadinfo=cd166000 task=cec90d00)
Stack: 00000001 c1328c70 c12a2e2c c040b56c 00000008 c02645db c040b56c 00000010
c040b56c c0263f00 00002710 00000000 c040b56c 010829d5 c1328be8 c040b6b0
c12a2d60 c1328be8 0040b6b0 408854e8 c025a58b cd167c94 c040b56c c025a5e8
Call Trace:
[<c02645db>] do_rw_disk+0x5cf/0x6d4
[<c0263f00>] multwrite_intr+0x0/0xc0
[<c025a58b>] start_request+0x97/0x150
[<c025a5e8>] start_request+0xf4/0x150
[<c025a960>] ide_do_request+0x2dc/0x33c
[<c025a9d2>] do_ide_request+0x12/0x18
[<c0248695>] generic_unplug_device+0x49/0x68
[<c0248818>] blk_run_queues+0x88/0xb8
[<c013b77f>] __wait_on_buffer+0x73/0x94
[<c0113f44>] autoremove_wake_function+0x0/0x38
[<c0113f44>] autoremove_wake_function+0x0/0x38
[<c013d185>] __block_prepare_write+0x2c9/0x3d8
[<c0178777>] __jbd_kmalloc+0x1b/0x6c
[<c013d9cd>] block_prepare_write+0x21/0x38
[<c016880c>] ext3_get_block+0x0/0x68
[<c0168ddd>] ext3_prepare_write+0xdd/0x1ec
[<c016880c>] ext3_get_block+0x0/0x68
[<c0125fda>] generic_file_aio_write_nolock+0x5be/0x974
[<c0112b6e>] do_schedule+0x26a/0x2f4
[<c0126483>] generic_file_aio_write+0x67/0x7c
[<c0166862>] ext3_file_write+0x4e/0x5c
[<c013a7b9>] do_sync_write+0x81/0xb4
[<c0111390>] do_page_fault+0x0/0x404
[<c011baa6>] update_wall_time+0x12/0x3c
[<c011bd5f>] do_timer+0x4b/0xcc
[<c010d611>] timer_interrupt+0x55/0x140
[<c013a895>] vfs_write+0xa9/0x13c
[<c013a98e>] sys_write+0x2a/0x3c
[<c0108a43>] syscall_call+0x7/0xb

Code: 0f b7 42 16 89 c3 43 66 89 5a 16 66 40 66 3b 42 14 72 09 66
<4>hda: lost interrupt
Unable to handle kernel NULL pointer dereference at virtual address 00000016
printing eip:
c0263ea0
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0060:[<c0263ea0>] Not tainted
EFLAGS: 00010046
EIP is at ide_multwrite+0xa0/0x100
eax: 00000000 ebx: c12a2da4 ecx: ce5fb000 edx: 00000000
esi: c12a2da4 edi: 00000000 ebp: 00000010 esp: c03b1ef4
ds: 007b es: 007b ss: 0068
Process swapper (pid: 0, threadinfo=c03b0000 task=c02f4e80)
Stack: c12a2da4 c040b56c c12a2d60 c040b4c0 00000000 c0263f4b c040b56c 00000010
c03b0000 c040b56c c12a2d60 c025abb7 c040b56c c02e5671 c040b56c c12a2d84
c03b0000 c02f7b00 c12a2d60 00000282 c0263f00 c011bcbf c12a2d60 00000001
Call Trace:
[<c0263f4b>] multwrite_intr+0x4b/0xc0
[<c025abb7>] ide_timer_expiry+0x153/0x204
[<c0263f00>] multwrite_intr+0x0/0xc0
[<c011bcbf>] run_timer_softirq+0xeb/0x134
[<c025aa64>] ide_timer_expiry+0x0/0x204
[<c011870a>] do_softirq+0x5a/0xac
[<c0109f90>] do_IRQ+0xfc/0x118
[<c0106c90>] default_idle+0x0/0x28
[<c0106c90>] default_idle+0x0/0x28
[<c0108bb0>] common_interrupt+0x18/0x20
[<c0106c90>] default_idle+0x0/0x28
[<c0106c90>] default_idle+0x0/0x28
[<c0106cb3>] default_idle+0x23/0x28
[<c0106d33>] cpu_idle+0x37/0x48
[<c0105000>] rest_init+0x0/0x5c
[<c0105057>] rest_init+0x57/0x5c

Code: 0f b7 42 16 89 c3 43 66 89 5a 16 66 40 66 3b 42 14 72 09 66
<0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing
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