WSL2-Linux-Kernel/arch/s390
Paul Mackerras fa13a5a1f2 sched: restore deterministic CPU accounting on powerpc
Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the
deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been
broken on powerpc, because we end up counting user time twice: once in
timer_interrupt() and once in update_process_times().

This fixes the problem by pulling the code in update_process_times
that updates utime and stime into a separate function called
account_process_tick.  If CONFIG_VIRT_CPU_ACCOUNTING is not defined,
there is a version of account_process_tick in kernel/timer.c that
simply accounts a whole tick to either utime or stime as before.  If
CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to
implement account_process_tick.

This also lets us simplify the s390 code a bit; it means that the s390
timer interrupt can now call update_process_times even when
CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a
suitable account_process_tick().

account_process_tick() now takes the task_struct * as an argument.
Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-11-09 22:39:38 +01:00
..
appldata [S390] appldata_base: Remove module_exit function and modular stuff 2007-10-12 16:13:05 +02:00
boot [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
crypto [CRYPTO] sha: Add header file for SHA definitions 2007-10-10 16:55:50 -07:00
hypfs [S390] hypfs: inode corruption due to missing locking 2007-08-22 13:51:49 +02:00
kernel sched: restore deterministic CPU accounting on powerpc 2007-11-09 22:39:38 +01:00
lib [S390] 4level-fixup cleanup 2007-10-22 12:52:49 +02:00
math-emu [S390] Calibrate delay and bogomips. 2007-02-05 21:18:31 +01:00
mm [S390] 4level-fixup cleanup 2007-10-22 12:52:49 +02:00
oprofile Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
Kconfig Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00
Kconfig.debug [PATCH] lockdep: irqtrace subsystem, s390 support 2006-07-03 15:27:03 -07:00
Makefile kbuild: enable 'make AFLAGS=...' to add additional options to AS 2007-10-15 21:59:31 +02:00
defconfig [S390] Update default configuration. 2007-10-22 12:52:46 +02:00