From: Nick Andrew <nick@nick-andrew.net>
To: linux-kernel@vger.kernel.org
Subject: Trivial patch to Documentation/i386/IO-APIC.txt
Date: Tue, 12 Feb 2008 12:08:43 +1100 [thread overview]
Message-ID: <20080212010843.GA13571@tull.net> (raw)
The description of the interrupt routing doesn't match the (nice) diagram.
Signed-off-by: Nick Andrew <nick@nick-andrew.net>
Nick.
--- a/Documentation/i386/IO-APIC.txt 2007-10-10 06:31:38.000000000 +1000
+++ b/Documentation/i386/IO-APIC.txt 2008-02-12 11:57:08.000000000 +1100
@@ -68,7 +68,7 @@
These INTA-D PCI IRQs are always 'local to the card', their real meaning
depends on which slot they are in. If you look at the daisy chaining diagram,
-a card in slot4, issuing INTA IRQ, it will end up as a signal on PIRQ2 of
+a card in slot4, issuing INTA IRQ, it will end up as a signal on PIRQ4 of
the PCI chipset. Most cards issue INTA, this creates optimal distribution
between the PIRQ lines. (distributing IRQ sources properly is not a
necessity, PCI IRQs can be shared at will, but it's a good for performance
reply other threads:[~2008-02-12 1:19 UTC|newest]
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