Date: Mon, 11 Apr 2005 20:31:24 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@FreeBSD.org Cc: Antoine Brodin <antoine.brodin@laposte.net> Subject: Re: Interrupt storm Message-ID: <200504112031.26979.jhb@FreeBSD.org> In-Reply-To: <20050409115745.31a0059c.antoine.brodin@laposte.net> References: <b37cb09705032911295ce15f84@mail.gmail.com> <200504081529.33026.jhb@FreeBSD.org> <20050409115745.31a0059c.antoine.brodin@laposte.net>
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On Saturday 09 April 2005 05:57 am, Antoine Brodin wrote: > John Baldwin <jhb@FreeBSD.org> wrote: > > I think your other link devices are meant to be used in APIC mode (note > > their names start with 'A') and thus I think they are aliases for the > > other link devices. So when I turn off the alias, I turn off the > > non-APIC mode one as well. Working BIOSen handle this by having the same > > link device change its behavior (different _PRS return values) depending > > on the PIC mode. It's not easy to determine if a link is just not used > > (for example, if no card is plugged into a slot with a dedicated link) or > > if it's an alias. I think having two ACPI devices alias to the same > > hardware is a bug in the BIOS though. Perhaps your BIOS vendor can be > > convinced to fix this. Can you see if Linux has the same problem btw? > > I've just sent a technical support request to ASUS. I'll let you know > when they reply. > Linux doesn't have the same problem: I tested with a knoppix live cd > yesterday. > dmesg: http://bsd.miki.eu.org/~antoine/knoppix36.dmesg , but it doesn't > look very helpful. Actually, it is. What Linux is doing is probing all the link devices before it probes any PCI devices, so all the _DIS calls happen before any interrupts are routed. I believe Nate knows how to get FreeBSD to do something similar via a hack. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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