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SubjectRe: boot_delay broken ?
On Tue, Feb 26, 2008 at 1:48 PM, Dave Young <hidave.darkstar@gmail.com> wrote:
> On Tue, Feb 26, 2008 at 1:22 PM, Randy Dunlap <randy.dunlap@oracle.com> wrote:
> > On Mon, 25 Feb 2008 10:14:36 +0800 Dave Young wrote:
> >
> > > On Sun, Feb 24, 2008 at 8:46 AM, Dave Jones <davej@codemonkey.org.uk> wrote:
> > > > The boot_delay switch seems to be behaving strangely in the
> > > > current -git. Setting it to =10 makes the output 'bursty'
> > > > it becomes slow for some printk's whilst others scroll by
> > > > at regular speed.
> > > > Setting it any higher than that seems to make it pause for
> > > > a really long time before it outputs any text at all.
> > >
> > > On my side there's this issue for a long time
> > > http://lkml.org/lkml/2007/8/8/79
> >
> > [http://marc.info/?l=linux-kernel&m=118655896515049&w=2]
> >
> > You asked questions and they were answered. Perhaps you didn't like
> > the answers.
>
> No, I like it. Thanks.
>
> But I still want to know why mdelay can not be used.
> is it not available for all archs or something else?
>
>
> >
> > Here's a question for you. What kernel boot options did you use?
> > Specifically, for lpj= and boot_delay= ?
>
> I tried boot_delay=100 and boot_delay=200 without lpj set, The result
> was really slow. It was better with lpj copied from dmesg, but was
> still slower then mdelay.

Especially at the very beginning after the message "Booting the kernel",
I need to wait several minutes to see the afterwards messages

>
> I think we can firstly use preset lpj, after delay calibrating just
> use the system lpj
>
>
>
> >
> > > >
> > > > x86 timer changes perhaps ?
> >
> >
> > ---
> > ~Randy
> >
>


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