Messages in this thread | | | Date | Thu, 24 May 2007 14:09:56 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 4/6] RTC: Ratelimit "lost interrupts" message |
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On Thu, 24 May 2007 16:56:52 -0400 Ben Collins <ben.collins@ubuntu.com> wrote:
> On Thu, 2007-05-24 at 13:48 -0700, Andrew Morton wrote: > > On Wed, 23 May 2007 18:23:06 -0400 > > Ben Collins <bcollins@ubuntu.com> wrote: > > > > > Signed-off-by: Ben Collins <bcollins@ubuntu.com> > > > --- > > > drivers/char/rtc.c | 3 ++- > > > 1 files changed, 2 insertions(+), 1 deletions(-) > > > > > > diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c > > > index 20380a2..22cf7aa 100644 > > > --- a/drivers/char/rtc.c > > > +++ b/drivers/char/rtc.c > > > @@ -1159,7 +1159,8 @@ static void rtc_dropped_irq(unsigned long data) > > > > > > spin_unlock_irq(&rtc_lock); > > > > > > - printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq); > > > + if (printk_ratelimit()) > > > + printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq); > > > > > > > Presumably someone is getting a lot of these messages. > > > > Do we know why? Is there something which needs fixing here? > > I got it a lot when using any sort of virtualization on my Core2Duo > (kvm, vmware, qemu). Just a big spew. Honestly, I was getting this with > 2.6.20, and haven't tested again with latest kernel.
OK, a bit of googling finds things like this: http://chxo.com/be2/20060821_3333.html, so I assume that it's some sort of generic problem with the hypervisor's emulation of the RTC.
Zach, do you know what the score is here?
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