A kernel profile might help.
Here's the profiles comparing the two versions. I don't understand why no "do_page_fault" shows up under 2.4.20 or why "gunzip" does.
Kirk
-------------------------------------------------
2.6.3:
# readprofile -r;./mem01;readprofile -m /boot/System.map-2.6.3 \
>> captured_profile2.6.3 1446 poll_idle 24.9310
4 delay_tsc 0.1667
71 do_page_fault 0.0536
41 schedule 0.0238
13 __might_sleep 0.0637
1 prepare_to_wait 0.0068
1 put_files_struct 0.0042
3229 do_softirq 16.3081
1 run_timer_softirq 0.0022
4807 total 0.02622.4.20:
# readprofile -r;./mem01;readprofile -m /boot/System.map-2.4.20 \
>> captured_profile2.4.20 347 gunzip 0.1559
8 acpi_restore_state_mem 0.0021
2 proc_dostring 0.0033
3 access_process_vm 0.0054
2 __mod_timer 0.0038
1 del_timer 0.0065
1 update_one_process 0.0036
1 notifier_chain_unregister 0.0052
365 total 0.0020
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