Re: linux-next: Tree for Nov 14

From: Guenter Roeck
Date: Sun Nov 16 2014 - 10:42:39 EST

On 11/16/2014 12:37 AM, Jiang Liu wrote:

On 2014/11/16 16:24, Jiang Liu wrote:
On 2014/11/16 14:56, Guenter Roeck wrote:
On 11/15/2014 08:20 PM, Jiang Liu wrote:

I took the configuration file I had for the SMP case (located in the same
directory in the git repository), disabled SMP, and ran "make
"old" is relative in this context; I don't usually create new configuration
files for each new kernel release, so, yes, you could say that the file
I used is "old".

CONFIG_X86_LOCAL_APIC is enabled. Keep in mind this is a configuration file
created with "make savedefconfig", so default settings are not included.
Correct, CONFIG_X86_IO_APIC is not enabled, but that is not really
since its dependencies are not met as far as I can see.

Overall, I am not sure I understand what you are trying to say. X86_IO_APIC
depends on X86_64 (not set) or SMP (not set) or X86_32_NON_STANDARD (not
or X86_UP_IOAPIC (not set because it depends on X86_UP_APIC which
depends on

Does that mean that I'll have to disable PCI_MSI to get x86 uniprocessor
support to work after your patch ?
Hi Guenter,
Previously, X86_IO_APIC will be enabled if PCI_MSI is enabled.
With my patch, x86_IO_APIC may be disabled even if PCI_MSI is enabled.
If X86_LOCAL_APIC/PCI_MSI are enabled and X86_IO_APIC is disabled, it
should work theoretically. I remember it works on my HP laptop.
Could you please help to check whether it solve the issue by manually
turning on X86_IO_APIC?
Or could you please help to apply this patch?

That patch does not help, unfortunately. The problem is exactly the same
after applying it.


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