The patch titled
round_jiffies() for i386 and x86-64 non-critical/corrected MCE polling
has been added to the -mm tree. Its filename is
round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: round_jiffies() for i386 and x86-64 non-critical/corrected MCE polling
From: Venki Pallipadi <venkatesh.pallipadi@xxxxxxxxx>
This helps to reduce the frequency at which the CPU must be taken out of a
lower-power state.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>
Acked-by: Tim Hockin <thockin@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/kernel/cpu/mcheck/non-fatal.c | 4 ++--
arch/x86_64/kernel/mce.c | 9 ++++++---
2 files changed, 8 insertions(+), 5 deletions(-)
diff -puN arch/i386/kernel/cpu/mcheck/non-fatal.c~round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling arch/i386/kernel/cpu/mcheck/non-fatal.c
--- a/arch/i386/kernel/cpu/mcheck/non-fatal.c~round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling
+++ a/arch/i386/kernel/cpu/mcheck/non-fatal.c
@@ -57,7 +57,7 @@ static DECLARE_DELAYED_WORK(mce_work, mc
static void mce_work_fn(struct work_struct *work)
{
on_each_cpu(mce_checkregs, NULL, 1, 1);
- schedule_delayed_work(&mce_work, MCE_RATE);
+ schedule_delayed_work(&mce_work, round_jiffies_relative(MCE_RATE));
}
static int __init init_nonfatal_mce_checker(void)
@@ -82,7 +82,7 @@ static int __init init_nonfatal_mce_chec
/*
* Check for non-fatal errors every MCE_RATE s
*/
- schedule_delayed_work(&mce_work, MCE_RATE);
+ schedule_delayed_work(&mce_work, round_jiffies_relative(MCE_RATE));
printk(KERN_INFO "Machine check exception polling timer started.\n");
return 0;
}
diff -puN arch/x86_64/kernel/mce.c~round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling arch/x86_64/kernel/mce.c
--- a/arch/x86_64/kernel/mce.c~round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling
+++ a/arch/x86_64/kernel/mce.c
@@ -375,7 +375,8 @@ static void mcheck_timer(struct work_str
if (mce_notify_user()) {
next_interval = max(next_interval/2, HZ/100);
} else {
- next_interval = min(next_interval*2, check_interval*HZ);
+ next_interval = min(next_interval*2,
+ (int)round_jiffies_relative(check_interval*HZ));
}
schedule_delayed_work(&mcheck_work, next_interval);
@@ -441,7 +442,8 @@ static __init int periodic_mcheck_init(v
{
next_interval = check_interval * HZ;
if (next_interval)
- schedule_delayed_work(&mcheck_work, next_interval);
+ schedule_delayed_work(&mcheck_work,
+ round_jiffies_relative(next_interval));
idle_notifier_register(&mce_idle_notifier);
return 0;
}
@@ -731,7 +733,8 @@ static void mce_restart(void)
on_each_cpu(mce_init, NULL, 1, 1);
next_interval = check_interval * HZ;
if (next_interval)
- schedule_delayed_work(&mcheck_work, next_interval);
+ schedule_delayed_work(&mcheck_work,
+ round_jiffies_relative(next_interval));
}
static struct sysdev_class mce_sysclass = {
_
Patches currently in -mm which might be from venkatesh.pallipadi@xxxxxxxxx are
git-cpufreq.patch
make-usb-autosuspend-timer-1-sec-jiffy-aligned.patch
round_jiffies-for-i386-and-x86-64-non-critical-corrected-mce-polling.patch
-
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