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Date:      Wed, 19 Nov 2008 15:24:40 +0100
From:      "Jonas Lund" <whizzter@gmail.com>
To:        "Jan Sebosik" <sebosik@demax.sk>
Cc:        freebsd-hardware@freebsd.org
Subject:   Re: Frebsd 7-STABLE, atapicd, atapicam and Intel errors [SOLVED]
Message-ID:  <436c7eda0811190624o4fb3d14cw137ebd3a7718be29@mail.gmail.com>
In-Reply-To: <49241D97.7070800@demax.sk>
References:  <4923F7D5.8030409@demax.sk> <20081119115311.GA85626@icarus.home.lan> <492403A1.60209@demax.sk> <20081119122201.GA86297@icarus.home.lan> <49240600.5000407@demax.sk> <20081119124104.GA86452@icarus.home.lan> <49240D05.7010909@demax.sk> <20081119130344.GA87110@icarus.home.lan> <4924106F.4070602@demax.sk> <49241D97.7070800@demax.sk>

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(NOTICE: i'm more of a lowlevel guy close to hardware guy not knowing
much of freebsd internals)

The fact that FreeBSD is NOT using HPET for timing might be the answer
to the "mystery". The HPET hardware might be/get enabled but not
handled and firing tons of unexpected interrupts (as you said.. linux
produces tons of data into the log, what's the actual content of those
logs?).

These interrupts in turn might disturb the cd drive in some fashion?

Can you bring up some interrupt statistics in freebsd? like a counter
of the number of events?

Just my 2 cents,  Jonas

2008/11/19 Jan Sebosik <sebosik@demax.sk>:
> [snip]
>>
>> Okay now I understand.  Thank you for taking the time to explain!  :-)
>>
>> And when you disable HPET in the BIOS, what happens?
>>
>>> Maybe I should try -CURRENT sometimes with your proposed ata patches (or
>>>  are they merged in right now?).
>>
>> Sure, you're free to try CURRENT.  The ATA code on CURRENT was
>> modularised, and also a very large patch applied; I can't promise it
>> fixes your CD/DVD drive issues though.
>>
>> I had problems getting CURRENT to see my PCI SATA Promise controller (it
>> wasn't appearing in pciconf -lv, nor dmesg), but I had no problems with
>> CURRENT seeing my ICH7 controller.  I also had other problems with
>> CURRENT which caused me to go back to RELENG_7.  CURRENT is undergoing
>> lots of changes right now, so I recommend subscribing to -current if you
>> plan on running it.
>>
>> I personally haven't written any ATA patches, except for extending
>> atacontrol to support per-disk write cache enable/disable.  I think
>> you might be confusing me with Andrey V. Elsukov, who *has* written
>> lots of ATA stuff.
>
>
> Now happens almost nothing (I don`t understand), except the cd/acd
> problems (READ_BIG errors), but I don`t understand why it is happening..
> maybe guys from Intel optimized this board too much for twista OS :).
>
> Wishing all the best
> --
> Jan Sebosik, Slovakia
> sebosik@demax.sk
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