Messages in this thread | | | From | Nikita Danilov <> | Date | Mon, 26 Jan 2004 14:10:44 +0300 | Subject | Re: [PATCH] Better "Losing Ticks" Error Message |
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timothy parkinson writes: > > Andrew, > > Seems like a lot of people see the below error message, but aren't quite sure > why it happens or how to fix it. I sure didn't. > > Here's my attempt at remedying that - Should apply cleanly against 2.6.1. > > Thanks, > Timothy > > diff -urN linux-2.6.1-orig/arch/i386/kernel/timers/timer_tsc.c linux-2.6.1/arch/i386/kernel/timers/timer_tsc.c > --- linux-2.6.1-orig/arch/i386/kernel/timers/timer_tsc.c 2004-01-09 01:59:46.000000000 -0500 > +++ linux-2.6.1/arch/i386/kernel/timers/timer_tsc.c 2004-01-23 21:16:24.000000000 -0500 > @@ -232,9 +232,13 @@ > /* sanity check to ensure we're not always losing ticks */ > if (lost_count++ > 100) { > printk(KERN_WARNING "Losing too many ticks!\n"); > - printk(KERN_WARNING "TSC cannot be used as a timesource." > - " (Are you running with SpeedStep?)\n"); > - printk(KERN_WARNING "Falling back to a sane timesource.\n"); > + printk(KERN_WARNING "TSC cannot be used as a timesource. "); > + printk(KERN_WARNING "Possible reasons for this are:\n"); > + printk(KERN_WARNING " You're running with Speedstep,\n"); > + printk(KERN_WARNING " You don't have DMA enabled for your hard disk (see hdparm),\n"); > + printk(KERN_WARNING " Incorrect TSC synchronization on an SMP system (see dmesg).\n");
+#ifdef CONFIG_KGDB + printk(KERN_WARNING " You're single-stepping under kgdb (see what you are doing).\n"); +#endif
Modulo that person debugging kernel with kgdb probably understands this anyway.
> + printk(KERN_WARNING "Falling back to a sane timesource now.\n"); > +
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