Date: Sat, 18 Jun 2005 22:40:15 GMT From: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua> To: freebsd-i386@FreeBSD.org Subject: Re: i386/78929: atapicam prevents boot, system hangs Message-ID: <200506182240.j5IMeFG4080118@freefall.freebsd.org>
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The following reply was made to PR i386/78929; it has been noted by GNATS.
From: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
To: bug-followup@FreeBSD.org, harrycoin@quietfountain.com, sos@FreeBSD.org,
thomas@FreeBSD.org
Cc:
Subject: Re: i386/78929: atapicam prevents boot, system hangs
Date: Sun, 19 Jun 2005 01:39:42 +0300
Hello!
I've just verified that problem exists even under newest 6-CURRENT.
Both my ATAPI drives behave in the similar way: on ICH4 they work with
ATAPICAM, but on Promise Ultra 100 TX2
they cause interrupt storm. E.g. I boot GENERIC kernel, verbose boot
messages are in
ftp://external.atlantis.dp.ua/FreeBSD/PR/78929/dmesg-6
and then I kldload atapicam. It doesn't output anything at this point
(/dev/cd0 doesn't
appear), but minute (!) later kernel outputs "ata2: reiniting channel"
and then almost
hanges. If I press <ALT><CTRL><ESC>, it slowly, letter-by-letter, enters
KDB prompt. Then
I can issue "show int" command, and it shows me millions interrupts
through IRQ22, which
is being used by Promise Ultra only. Removing "device atapicd" from
kernel doesn't cure
this problem. What can I do to help hunting on this bug? ATA+ATAPICAM is
quite complex
creature, so I don't know where to start from...
Sincerely, Dmitry
--
Atlantis ISP, System Administrator
nic-hdl: LYNX-RIPE
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