The patch titled
sched-improve-migration-accuracy fix
has been added to the -mm tree. Its filename is
sched-improve-migration-accuracy-fix.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: sched-improve-migration-accuracy fix
From: Mike Galbraith <efault@xxxxxx>
Fix sleep_avg breakage induced by sched-improve-migration-accuracy.path
Use p->last_ran to fix sched_time buglet instead of p->timestamp.
Signed-off-by: Mike Galbraith <efault@xxxxxx>
Acked-by: Don Mullis <dwm@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sched.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff -puN kernel/sched.c~sched-improve-migration-accuracy-fix kernel/sched.c
--- a/kernel/sched.c~sched-improve-migration-accuracy-fix
+++ a/kernel/sched.c
@@ -2972,8 +2972,8 @@ EXPORT_PER_CPU_SYMBOL(kstat);
static inline void
update_cpu_clock(struct task_struct *p, struct rq *rq, unsigned long long now)
{
- p->sched_time += now - p->timestamp;
- p->timestamp = rq->most_recent_timestamp = now;
+ p->sched_time += now - p->last_ran;
+ p->last_ran = rq->most_recent_timestamp = now;
}
/*
@@ -2986,7 +2986,7 @@ unsigned long long current_sched_time(co
unsigned long flags;
local_irq_save(flags);
- ns = p->sched_time + sched_clock() - p->timestamp;
+ ns = p->sched_time + sched_clock() - p->last_ran;
local_irq_restore(flags);
return ns;
@@ -3497,10 +3497,11 @@ switch_tasks:
prev->sleep_avg -= run_time;
if ((long)prev->sleep_avg <= 0)
prev->sleep_avg = 0;
+ prev->timestamp = prev->last_ran = now;
sched_info_switch(prev, next);
if (likely(prev != next)) {
- next->timestamp = prev->last_ran = now;
+ next->timestamp = now;
rq->nr_switches++;
rq->curr = next;
++*switch_count;
_
Patches currently in -mm which might be from efault@xxxxxx are
remove-the-syslog-interface-when-printk-is-disabled.patch
sched-improve-migration-accuracy.patch
sched-improve-migration-accuracy-tidy.patch
sched-improve-migration-accuracy-fix.patch
readahead-call-scheme.patch
-
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