[gentoo-user] New kernel 2.6.20-r6

[gentoo-user] New kernel 2.6.20-r6

[Mick]

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Hi All,

I see these two messages in dmesg and I am not sure what they're about:

intel_rng: FWH not detected

hda: 39070080 sectors (20003 MB) w/1740KiB Cache, CHS=16383/255/63<6>hda: 
hw_config=600d, UDMA(100)

What's the hw_config part?
-- 
Regards,
Mick

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Re: [gentoo-user] New kernel 2.6.20-r6

[Benno Schulenberg]

Mick wrote:
> hda: 39070080 sectors (20003 MB) w/1740KiB Cache,
> CHS=16383/255/63<6>hda: hw_config=600d, UDMA(100)
>
> What's the hw_config part?

It just means that the "hardware configuration is good".

Sorry, couldn't resist.  :)

Benno

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Re: [gentoo-user] New kernel 2.6.20-r6

[Dan Cowsill]

Lol

On 4/18/07, Benno Schulenberg <benno.schulenberg@gmail.com> wrote:
> Mick wrote:
> > hda: 39070080 sectors (20003 MB) w/1740KiB Cache,
> > CHS=16383/255/63<6>hda: hw_config=600d, UDMA(100)
> >
> > What's the hw_config part?
>
> It just means that the "hardware configuration is good".
>
> Sorry, couldn't resist.  :)
>
> Benno
>
> --
> Cetere mi opinias ke ne ĉio tradukenda estas.
> --
> gentoo-user@gentoo.org mailing list
>
>


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Re: [gentoo-user] New kernel 2.6.20-r6

[Arturo 'Buanzo' Busleiman]

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Dan Cowsill wrote:
> Lol

ROFL!

Why did I choose THIS moment (1) to understand the joke?

Sincerely,
Buanzo

(1): After a good stout beer. Sorry, after TWO good stout beers.

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Re: [gentoo-user] New kernel 2.6.20-r6

[Guillermo A. Amaral]

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On Wednesday 18 April 2007, Benno Schulenberg wrote:
> Mick wrote:
> > hda: 39070080 sectors (20003 MB) w/1740KiB Cache,
> > CHS=16383/255/63<6>hda: hw_config=600d, UDMA(100)
> >
> > What's the hw_config part?
>
> It just means that the "hardware configuration is good".
>
> Sorry, couldn't resist.  :)
>
> Benno
>
> --
> Cetere mi opinias ke ne ĉio tradukenda estas.

LOL nice, 600d

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& nick: guillermoamaral
@ blog: http://blog.guillermoamaral.com/
@ site: http://www.guillermoamaral.com/
$ irc: guillermoamaral@freenode
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[gentoo-user] Re: New kernel 2.6.20-r6

[Mick]

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On Wednesday 18 April 2007 19:37, Mick wrote:
> Hi All,
>
> I see these two messages in dmesg and I am not sure what they're about:
>
> intel_rng: FWH not detected

I think this has to do with:

CONFIG_HW_RANDOM_INTEL=y

Evidently my laptop does not have a firmware hub (FWH) for generating random 
numbers.

> hda: 39070080 sectors (20003 MB) w/1740KiB Cache, CHS=16383/255/63<6>hda:
> hw_config=600d, UDMA(100)
>
> What's the hw_config part?

Any more (useful) ideas on this?
-- 
Regards,
Mick

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Re: [gentoo-user] Re: New kernel 2.6.20-r6

[Iain Buchanan]

On Wed, 2007-04-18 at 22:58 +0100, Mick wrote:
> On Wednesday 18 April 2007 19:37, Mick wrote:
> > Hi All,
> >
> > I see these two messages in dmesg and I am not sure what they're about:
> >
> > intel_rng: FWH not detected
> 
> I think this has to do with:
> 
> CONFIG_HW_RANDOM_INTEL=y
> 
> Evidently my laptop does not have a firmware hub (FWH) for generating random 
> numbers.

Or that your laptop can't generate random hardware.

> > hda: 39070080 sectors (20003 MB) w/1740KiB Cache, CHS=16383/255/63<6>hda:
> > hw_config=600d, UDMA(100)
> >
> > What's the hw_config part?
> 
> Any more (useful) ideas on this?

I admit I had to read the joke 4 times before I got it, but that only
makes it funnier.

um, I think it's a register (ie. a number where each bit has some
meaning) about the capability of your HD.  What exactly 0x6000, 0x8,
0x4, and 0x1 are, I don't know.  Something to do with cable types, and
so on, I think.

someone more into the kernel could probably help more here I think :)

HTH,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

linux: the choice of a GNU generation
(ksh@cis.ufl.edu put this on Tshirts in '93)

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Re: [gentoo-user] Re: New kernel 2.6.20-r6

[Etaoin Shrdlu]

On Thursday 19 April 2007 03:53, Iain Buchanan wrote:

> > > hda: 39070080 sectors (20003 MB) w/1740KiB Cache,
> > > CHS=16383/255/63<6>hda: hw_config=600d, UDMA(100)
> > >
> > > What's the hw_config part?
> >
> > Any more (useful) ideas on this?

Seems a kind of hardware config register (part of a struct hd_driveid 
object), whose value is used by the ide drivers to adjust the drive 
speed, depending on the type of cable used. The function that checks its 
value (and prints the "hda: hw_config=600d" message you are seeing) 
seems to be in drivers/ide/ide-iops.c, and is defined as follows:

/*
 *  All hosts that use the 80c ribbon must use!
 *  The name is derived from upper byte of word 93 and the 80c ribbon.
 */
u8 eighty_ninty_three (ide_drive_t *drive)

That function is called from various pci ide drivers code (for example 
drivers/ide/pci/it821x.c, drivers/ide/pci/siimage.c, 
drivers/ide/pci/piix.c, drivers/ide/pci/sis5513.c), from a function 
whose name is composed appending "_ratemask" to the driver name (eg, 
piix_ratemask, sis5513_ratemask, etc.) in a way similar to this:

 if (!eighty_ninty_three(drive))
                mode = min(mode, (u8)1);

So, if eighty_ninty_three returns 0, "mode" (which I suppose indicates 
the DMA/UDMA mode) is set to 1 if it wasn't already.

This value is then used as an argument to the ide_rate_filter function 
(along with the xferspeed). The comments in the code for ide_rate_filter 
are as follows (drivers/ide/ide-lib.c):

/**
 *      ide_rate_filter         -       return best speed for mode
 *      @mode: modes available
 *      @speed: desired speed
 *
 *      Given the available DMA/UDMA mode this function returns
 *      the best available speed at or below the speed requested.
 */

Bottom line: the message you see is an informational message printed 
during ide initialization, and the value of hw_config is used by the 
kernel to set drive speed.

Keep in mind that I'm definitely no kernel guru, and did my searches by 
simply grepping through the code, so something might be wrong in what I 
said. Anyway, I think the general idea is correct.

But don't worry, because your value for hw_config is "600d"!  :)
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Re: [gentoo-user] Re: New kernel 2.6.20-r6

[Etaoin Shrdlu]

On Thursday 19 April 2007 11:00, Etaoin Shrdlu wrote:

> On Thursday 19 April 2007 03:53, Iain Buchanan wrote:

Sorry, this was intended to be a reply to the OP (Mick IIRC), my fault.
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Re: [gentoo-user] Re: New kernel 2.6.20-r6

[Mick]

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On Thursday 19 April 2007 10:03, Etaoin Shrdlu wrote:
> On Thursday 19 April 2007 11:00, Etaoin Shrdlu wrote:
> > On Thursday 19 April 2007 03:53, Iain Buchanan wrote:
>
> Sorry, this was intended to be a reply to the OP (Mick IIRC), my fault.

Cool, thanks for your very informative explanation.  Every new kernel is a bit 
of an education for me.  ;-)

I can now rest assured that my hda on this laptop is 600d.  Phew!
-- 
Regards,
Mick

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[gentoo-user] Re: New kernel 2.6.20-r6

[James]

Mick <michaelkintzios <at> gmail.com> writes:

> 

> I can now rest assured that my hda on this laptop is 600d.  Phew!


Mathematically, firmware engineers suffer from limited
mathematical/logical constructs:
For example
They cannot tell the difference between Christmas and Halloween....

Why ?

because    31oct == 25dec


James
~


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