From: Mikael Pettersson <mikpe@csd.uu.se>
To: nicolas.baradakis@prologin.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: Incompatibility between 'Local APIC' and '8139too'
Date: Tue, 11 Feb 2003 02:45:33 +0100 (MET) [thread overview]
Message-ID: <200302110145.CAA15207@kim.it.uu.se> (raw)
On Tue, 11 Feb 2003 00:47:12 +0100, Nicolas Baradakis wrote:
>Activating the option 'Local APIC support on uniprocessors' prevents
>the network device '8139too' from transmitting any packet.
>...
>The workaround is to boot the kernel with the option 'noapic' or
>recompile it without the option 'Local APIC', and then the network
>device works perfectly.
...
>>From the debian package 'kernel-source-2.4.20_2.4.20-5_all.deb'
I strongly believe your problems are related to the I/O APIC,
not the local APIC:
- the local APIC has minimal impact on system-level IRQ handling,
whereas the impact from the I/O APIC by definition is major
- the 'noapic' option disables the I/O APIC, NOT the local APIC
(at least in all standard kernels, Debian may have broken this)
- disabling the local APIC kernel option also disables I/O
APIC on uniprocessor support
next reply other threads:[~2003-02-11 1:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-11 1:45 Mikael Pettersson [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-02-10 23:47 Incompatibility between 'Local APIC' and '8139too' Nicolas Baradakis
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