Messages in this thread Patch in this message | | | Date | Fri, 21 Nov 2008 16:34:26 +0100 | From | Folkert van Heusden <> | Subject | Re: [2.6.28-rc5] RCU detected CPU 0 stall (t=4294893165/750 jiffies) |
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> > I'm afraid there's no script for that: it happens during boot. > > This is a HZ=250 machine, correct? If so, please try the following > patch (already in -tip), which helps suppress boot-time false positives.
That's correct, 250Hz.
> diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h > index 5f89b62..301dda8 100644 > --- a/include/linux/rcuclassic.h > +++ b/include/linux/rcuclassic.h > @@ -41,7 +41,7 @@ > #include <linux/seqlock.h> > > #ifdef CONFIG_RCU_CPU_STALL_DETECTOR > -#define RCU_SECONDS_TILL_STALL_CHECK ( 3 * HZ) /* for rcp->jiffies_stall */ > +#define RCU_SECONDS_TILL_STALL_CHECK (10 * HZ) /* for rcp->jiffies_stall */
Isn't it better to let the define depend on the value of CONFIG_HZ? E.g.
Signed-off-by: Folkert van Heusden <folkert@vanheusden.com>
diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h index 5f89b62..301dda8 100644 --- a/include/linux/rcuclassic.h +++ b/include/linux/rcuclassic.h @@ -41,7 +41,7 @@ #include <linux/seqlock.h> #ifdef CONFIG_RCU_CPU_STALL_DETECTOR -#define RCU_SECONDS_TILL_STALL_CHECK ( 3 * HZ) /* for rcp->jiffies_stall */ +#define RCU_SECONDS_TILL_STALL_CHECK ( (CONFIG_HZ / 100) * 3 * HZ) /* for rcp->jiffies_stall */ #define RCU_SECONDS_TILL_STALL_RECHECK (30 * HZ) /* for rcp->jiffies_stall */ #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
Folkert van Heusden
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