linux-kernel - Re: [PATCH 4/6] RTC: Ratelimit "lost interrupts" message

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 24 May 2007 16:56:52 -0400
From:	Ben Collins <ben.collins@...ntu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] RTC: Ratelimit "lost interrupts" message

On Thu, 2007-05-24 at 13:48 -0700, Andrew Morton wrote:
> On Wed, 23 May 2007 18:23:06 -0400
> Ben Collins <bcollins@...ntu.com> wrote:
> 
> > Signed-off-by: Ben Collins <bcollins@...ntu.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.

-- 
Ubuntu   : http://www.ubuntu.com/
Linux1394: http://wiki.linux1394.org/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/