Calibrating delay loop... crashes

Calibrating delay loop... crashes

[Nguyen Thanh Binh]

Hello all,

When booting Monta Vista Linux on Memec board
(Virtex-4 FX12 LC), it crashed after printing the
following message:

    "Calibrating delay loop..."

By looking at the source code, I found that in the
init/main.c the problem came from the calibrate_delay
function: jiffies was not incremented (jiffies was
always equal to 0).

Have anyone get the similar problem or any experience
to fix it?

Thank you.

Binh Nguyen



		
___________________________________________________________ 
To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com

Re: Calibrating delay loop... crashes

[Kevin D. Kissell]

Nguyen Thanh Binh wrote:
> When booting Monta Vista Linux on Memec board
> (Virtex-4 FX12 LC), it crashed after printing the
> following message:
> 
>     "Calibrating delay loop..."
> 
> By looking at the source code, I found that in the
> init/main.c the problem came from the calibrate_delay
> function: jiffies was not incremented (jiffies was
> always equal to 0).
> 
> Have anyone get the similar problem or any experience
> to fix it?

I take it that by "crashed", you mean it hung?  If so,
it sounds like you aren't getting any timer interrupts.

		Regards,

		Kevin K.

Re: Calibrating delay loop... crashes

[Nguyen Thanh Binh]

Hi Kevin,

> > When booting Monta Vista Linux on Memec board
> > (Virtex-4 FX12 LC), it crashed after printing the
> > following message:
> > 
> >     "Calibrating delay loop..."
> > 
> > By looking at the source code, I found that in the
> > init/main.c the problem came from the
> calibrate_delay
> > function: jiffies was not incremented (jiffies was
> > always equal to 0).
> > 
> > Have anyone get the similar problem or any
> experience
> > to fix it?
> 
> I take it that by "crashed", you mean it hung?  If
> so,
> it sounds like you aren't getting any timer
> interrupts.

You are right. Because jiffies was not incremented so
the below code segment in function calibrate_delay in
file init/mian.c hung:

   ticks = jiffies;
   while (ticks == jiffies) ;

As I am a newbie, I did not find how to fix it.

Thank you for any help.

Binh Nguyen

Nguyễn Thanh Bình


		
___________________________________________________________ 
How much free photo storage do you get? Store your holiday 
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com

Re: Calibrating delay loop... crashes

[Manish Lachwani]

Hi !

There is a porting guide at:

http://linux.junsun.net/porting-howto/

which is quite useful. Read the "System time and
timer" section. It describes to some extent
implementing timer services.

Thanks
Manish Lachwani



--- Nguyen Thanh Binh <n_tbinh@yahoo.com> wrote:

> Hi Kevin,
> 
> > > When booting Monta Vista Linux on Memec board
> > > (Virtex-4 FX12 LC), it crashed after printing
> the
> > > following message:
> > > 
> > >     "Calibrating delay loop..."
> > > 
> > > By looking at the source code, I found that in
> the
> > > init/main.c the problem came from the
> > calibrate_delay
> > > function: jiffies was not incremented (jiffies
> was
> > > always equal to 0).
> > > 
> > > Have anyone get the similar problem or any
> > experience
> > > to fix it?
> > 
> > I take it that by "crashed", you mean it hung?  If
> > so,
> > it sounds like you aren't getting any timer
> > interrupts.
> 
> You are right. Because jiffies was not incremented
> so
> the below code segment in function calibrate_delay
> in
> file init/mian.c hung:
> 
>    ticks = jiffies;
>    while (ticks == jiffies) ;
> 
> As I am a newbie, I did not find how to fix it.
> 
> Thank you for any help.
> 
> Binh Nguyen
> 
> Nguy&#7877;n Thanh Bình
> 
> 
> 		
>
___________________________________________________________
> 
> How much free photo storage do you get? Store your
> holiday 
> snaps for FREE with Yahoo! Photos
> http://uk.photos.yahoo.com
> 
> 

Re: Calibrating delay loop... crashes

[Ralf Baechle]

On Tue, Nov 15, 2005 at 06:24:39PM -0800, Manish Lachwani wrote:

> There is a porting guide at:
> 
> http://linux.junsun.net/porting-howto/
> 
> which is quite useful. Read the "System time and
> timer" section. It describes to some extent
> implementing timer services.

Except it being outdated, totally 2.4 centric and having been superseeded
by the version that's now in the www.linux-mips.org wiki since almost a
year.

  Ralf

Re: Calibrating delay loop... crashes

[Manish Lachwani]

Its probably hung at that point since the timer
interrupt never came.

Thanks
Manish Lachwani

--- Nguyen Thanh Binh <n_tbinh@yahoo.com> wrote:

> Hello all,
> 
> When booting Monta Vista Linux on Memec board
> (Virtex-4 FX12 LC), it crashed after printing the
> following message:
> 
>     "Calibrating delay loop..."
> 
> By looking at the source code, I found that in the
> init/main.c the problem came from the
> calibrate_delay
> function: jiffies was not incremented (jiffies was
> always equal to 0).
> 
> Have anyone get the similar problem or any
> experience
> to fix it?
> 
> Thank you.
> 
> Binh Nguyen
> 
> 
> 
> 		
>
___________________________________________________________
> 
> To help you stay safe and secure online, we've
> developed the all new Yahoo! Security Centre.
> http://uk.security.yahoo.com
> 
>