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ru.linux
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From : Denis Zaitsev 2:5010/70 09 Aug 2003 17:50:43
To : Denis Revin
Subject : Re: What does it mean?
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Denis Revin <Denis.Revin@p24.f14.n5069.z2.fidonet.org> writes:
> BOM zzz@anda.ru!
>
> 08 Aug 03 09:50, you wrote to Alexey Deriyenko:
>
> >> DR> Хех, у меня тоже самое, вылазает один раз и обычно когда только
> >> DR> Linux загрузился. Hи к чему плохому вроде не приводит... А из-за
> >> DR> чего это, хз :-(
> >> Присоединяюсь к вопросу. У меня тоже самое, причем на всех ядрах
> z> 2.4.18-2.4.21.
> >> Я уже задавал его давно, но никто не ответил :(
> z> Где-то в linux-kernel это обсуждалось (давно). Hичего толком не
> z> помню, кроме того что это, типа, нормально.
> Уф, ну хоть одно успокаивает :-)
> Эта штука и не только на моей машине вылазила. Хм, интересно что-же это такое
> всетаки? :-)
Залезь в архивы linux-kernel... Большие они, правда :). Или не
лезь. Я вот нашёл, например, пару вразумительных писем (из треда про
ойёйёй...):
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References: <3E2C8EFF.6020707@tin.it>
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Date: Mon, 20 Jan 2003 18:36:51 -0600
Subject: Re: Spurious 8259A interrupt: IRQ7 ????
From: "David D. Hagood" <wowbagger@sktc.net>
To: AnonimoVeneziano <voloterreno@tin.it>
Status: RO
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AnonimoVeneziano wrote:
> What does it mean this message?
>
> Of what problem is the signal?
It is most likely a hardware problem.
When a device signals an interrupt, it asserts its interrupt pin. When
the CPU asks the interrupt controller what device generated the
interrupt, the interrupt controller tells the CPU.
But if the interrupt line "goes away" before the CPU fetches the vector,
then the interrupt controller doesn't "know" what IRQ caused the
interrupt. So the interrupt controller sends an IRQ #7 to the CPU, along
with setting a bit in the interrupt controller's status register that
says in effect "this isn't really an IRQ 7, but I have no idea what it
was. Sorry."
If you have ISA cards in your system, remove them from the system and
re-insert them (with the power off, of course) - they may have developed
some oxidization on the card edge connector. You can also try scrubbing
the card edge with some plain paper (a US dollar bill works even better,
but you might not have access to dead presidents in Italy.)
Ditto with PCI cards - remove them, polish the connector, then re-insert
them.
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Date: 21 Jan 2003 03:20:02 +0000
Subject: Re: Spurious 8259A interrupt: IRQ7 ????
From: Alan <alan@lxorguk.ukuu.org.uk>
To: "David D. Hagood" <wowbagger@sktc.net>
Cc: AnonimoVeneziano <voloterreno@tin.it>, LKML <linux-kernel@vger.kernel.org>
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On Tue, 2003-01-21 at 00:36, David D. Hagood wrote:
> AnonimoVeneziano wrote:
> > What does it mean this message?
> >
> > Of what problem is the signal?
>
> It is most likely a hardware problem.
It can occur for lots of harmless software reasons too. If you disable
the IRQ on a device just as the PIC sees it you may see this result
for example.
Really for 7/15 on a PC we shouldnt be bugging people
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Re: What does it mean?