[haiku-bugs] Re: [Haiku] #8684: Unhandled page fault panic at boot with rtl81xx driver
- From: "mmlr" <trac@xxxxxxxxxxxx>
- Date: Tue, 13 Nov 2012 18:59:03 -0000
#8684: Unhandled page fault panic at boot with rtl81xx driver
-----------------------------+----------------------------
Reporter: xyzzy | Owner: axeld
Type: bug | Status: new
Priority: critical | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking: 9139, 9153
Has a Patch: 0 | Platform: x86
-----------------------------+----------------------------
Changes (by mmlr):
* owner: nobody => axeld
* priority: normal => critical
* component: Drivers/Network/rtl81xx => System/Kernel
Comment:
Just to clarify: This happens only when MSIs are supported by the driver
in general, the driver tries to use them for the given hardware and MSIs
are enabled. For MSIs to be enabled, the local APIC is required, so
disabling it in the safemode settings works around the problem (as has
been mentioned earlier). Since the local APIC is required for inter
processor interrupts, disabling them also disables SMP. It also obviously
isn't triggered if the system doesn't have a local APIC at all. Hence it
is possible that it cannot be reproduced on some systems. Pretty much
every modern system does have local APICs (as needed for APIC timers, IO-
APICs and SMP) and most cuerrent network hardware supports MSIs and many
of the drivers for the most common hardware do too. Overall this makes it
pretty severe.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8684#comment:14>
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