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[PATCH] s390: cputime misaccounting

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finish_arch_switch needs to update the user cpu time as well, not just the
system cpu time.  Otherwise the partial user cpu time of a process that is
stored in the lowcore will be (mis-)accounted to the next process.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Martin Schwidefsky
2006-01-14 13:21:03 -08:00
committed by Linus Torvalds
parent bcc132651d
commit 1f1c12afe5
4 changed files with 30 additions and 8 deletions
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5
include/asm-s390/system.h
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@@ -115,13 +115,14 @@ static inline void sched_cacheflush(void)
}
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void account_user_vtime(struct task_struct *);
extern void account_vtime(struct task_struct *);
extern void account_tick_vtime(struct task_struct *);
extern void account_system_vtime(struct task_struct *);
#endif
#define finish_arch_switch(prev) do { \
set_fs(current->thread.mm_segment); \
account_system_vtime(prev); \
account_vtime(prev); \
} while (0)
#define nop() __asm__ __volatile__ ("nop")