Re: [PATCH 1/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting)

From: Simon Horman <>
Date: 2007-11-19 15:34:43
On Tue, Oct 16, 2007 at 10:33:59PM +0900, Hidetoshi Seto wrote:
> > [1/9] ia64_add_config_virt_cpu_accounting.patch
> The VIRT_CPU_ACCOUNTING option is already implemented s390
> and powerpc archs.
> By enabling this option, the arch can hook a function named
> account_system_vtime() to irq_enter(), irq_exit(), and
> head and tail of do_softirq().
> This patch just add the Kconfig option to ia64, and enable
> to hook ia64 specific account_system_vtime() function,
> currently nop as generic one.


When I apply this patch and enable VIRT_CPU_ACCOUNTING I get
the following build error. Perhaps the fragment that creates
account_process_tick in arch/ia64/kernel/time.c is missing?

kernel/built-in.o: In function `update_process_times': undefined
reference to `account_process_tick'


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Received on Mon Nov 19 15:34:59 2007

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