The patch titled
fix jiffies clocksource inittime
has been added to the -mm tree. Its filename is
fix-jiffies-clocksource-inittime.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
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------------------------------------------------------
Subject: fix jiffies clocksource inittime
From: john stultz <johnstul@xxxxxxxxxx>
In debugging a problem w/ the -rt tree, I noticed that on systems that mark
the tsc as unstable before it is registered, the TSC would still be
selected and used for a short period of time. Digging in it looks to be a
result of the mix of the clocksource list changes and my clocksource
initialization changes.
With the -rt tree, using a bad TSC, even for a short period of time can
results in a hang at boot. I was not able to reproduce this hang w/
mainline, but I'm not completely certain that someone won't trip on it.
This patch resolves the issue by initializing the jiffies clocksource
earlier so a bad TSC won't get selected just because nothing else is yet
registered.
Signed-off-by: John Stultz <johnstul@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/time/jiffies.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/time/jiffies.c~fix-jiffies-clocksource-inittime kernel/time/jiffies.c
--- a/kernel/time/jiffies.c~fix-jiffies-clocksource-inittime
+++ a/kernel/time/jiffies.c
@@ -69,4 +69,4 @@ static int __init init_jiffies_clocksour
return clocksource_register(&clocksource_jiffies);
}
-module_init(init_jiffies_clocksource);
+core_initcall(init_jiffies_clocksource);
_
Patches currently in -mm which might be from johnstul@xxxxxxxxxx are
origin.patch
fix-jiffies-clocksource-inittime.patch
convert-h8-300-to-generic-timekeeping.patch
v850-generic-timekeeping-conversion.patch
optimize-timespec_trunc.patch
time-smp-friendly-alignment-of-struct-clocksource.patch
move-timekeeping-code-to-timekeepingc.patch
move-timekeeping-code-to-timekeepingc-fix.patch
ignore-stolen-time-in-the-softlockup-watchdog.patch
declare-struct-ktime.patch
clocksource-arm-initialize-list-value.patch
clocksource-parisc-initialize-list-value.patch
clocksource-avr32-initialize-list-value.patch
clocksource-mips-initialize-list-value.patch
clocksource-i386-initialize-list-value.patch
clocksource-x86_64-initialize-list-value.patch
clocksource-s390-initialize-list-value.patch
clocksource-driver-initialize-list-value.patch
clocksource-refactor-duplicate-registration-checking.patch
-
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