Re: keventd takes 99% of CPU when laptop lid is closed

From: Antille Julien
Date: Fri May 14 2004 - 02:30:55 EST



Here is the ouput I get from the command you requested me to do:

c02064a8 acpi_ut_update_object_reference 5 0,0095
c0137e10 kmalloc 6 0,0163
c01f48d7 acpi_ds_result_pop 6 0,0769
c01f9ab3 acpi_ex_name_segment 6 0,0455
c01fec80 acpi_ns_search_and_enter 6 0,0234
c01ff4b4 acpi_ns_walk_namespace 6 0,0246
c0207994 acpi_ut_create_update_state_and_push 6 0,1200
c01f3d7d acpi_ds_exec_end_op 7 0,0113
c0200855 acpi_ps_next_parse_state 7 0,0355
c02013eb acpi_ps_pop_scope 8 0,0800
c01f3c6d acpi_ds_exec_begin_op 9 0,0331
c01f4b86 acpi_ds_create_walk_state 9 0,0818
c0201857 acpi_ps_delete_parse_tree 9 0,0621
c0207542 acpi_ut_valid_acpi_name 9 0,1915
c01fdb18 acpi_ns_lookup 10 0,0134
c02006f0 acpi_ps_complete_this_op 10 0,0280
c02014b7 acpi_ps_append_arg 10 0,0787
c01fbac2 acpi_ex_resolve_operands 11 0,0139
c020173c acpi_ps_get_next_walk_op 11 0,0417
c0200500 acpi_ps_get_next_arg 14 0,0368
c01f2884 acpi_ds_method_data_init 15 0,1402
c020067c acpi_ps_get_opcode_info 17 0,2576
c01febe0 acpi_ns_search_node 18 0,2727
c01f1a97 acpi_os_get_thread_id 21 0,6000
c01ff439 acpi_ns_get_parent_node 22 0,7586
c020091a acpi_ps_parse_loop 44 0,0205
c01ff456 acpi_ns_get_next_valid_node 48 2,6667
c0207928 acpi_ut_release_mutex 53 0,4907
c010ac60 handle_IRQ_event 72 0,4091
c01f153e acpi_os_write_port 72 1,0909
c020585a acpi_ut_acquire_from_cache 75 0,4601
c02057d0 acpi_ut_release_to_cache 76 0,5507
c02078b6 acpi_ut_acquire_mutex 95 0,8333
c01ff468 acpi_ns_get_next_node 108 1,4211
c01fe00e acpi_ns_delete_namespace_by_owner 127 0,8038
c01f14ef acpi_os_read_port 167 2,1139
c01f1985 acpi_os_wait_semaphore 202 0,9395
c01f1a5c acpi_os_signal_semaphore 254 5,7727
c020c4d3 acpi_processor_idle 1205 2,5262
00000000 total 3042 0,0014

I hope that helps.

Julien Antille

On Friday 14 May 2004 04.08, Andrew Morton wrote:
> Antille Julien <julien.antille@xxxxxxx> wrote:
> > On 2.4.26, 2.6.5 and 2.6.6, the kernel process keventd takes 99% of CPU
> > when my laptop's lid is closed. It comes back to normal when I open it
> > again. Laptop is a DELL Inspirion 2650.
> >
> > This problem did not occure with <=2.4.25 or <= 2.6.4
>
> Can you please generate a kernel profile?
>
> Boot with the "profile=1" kernel command line option.
>
> sudo readprofile -r
> <close lid>
> <wait 30 seconds>
> <open lid>
> sudo readprofile -n -v -m /wherever/System.map | sort -n +2 | tail -40 >
> foo
>
> And send us foo?
>
> Make sure that you use the System.map which corresponds to the
> currently-running kernel.
>
> Thanks.
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