On Tue, 2005-10-18 at 08:42 +0200, Ingo Molnar wrote:
> * Daniel Walker <[email protected]> wrote:
>
> > I found this latency ~5 minutes after boot up, no load . It looks like
> > vgacon_scroll() has a memset like operation which can grow.
>
> do you have PRINTK_IGNORE_LOGLEVEL enabled? If yes then much of the
> printk code will run with interrupts disabled - hence non-preemptable.
> PRINTK_IGNORE_LOGLEVEL is a debugging feature for developers. I have
> added an extra explanation to the Kconfig, see below.
I was just running a "make defconfig" and I enabled latency tracing .
PRINTK_IGNORE_LOGLEVEL defaults to off (doesn't it?), and I didn't make
any changes to it . Unless it get switched on by something else ..
It looks like the logic might be reversed in release_console_sem() .
Daniel
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
