Re: linux-next: Tree for Apr 9 (x86 boot problem)

[Randy Dunlap]

On 4/12/21 11:06 PM, Mike Rapoport wrote:
> Hi Randy,
> 
> On Mon, Apr 12, 2021 at 01:53:34PM -0700, Randy Dunlap wrote:
>> On 4/12/21 10:01 AM, Mike Rapoport wrote:
>>> On Mon, Apr 12, 2021 at 08:49:49AM -0700, Randy Dunlap wrote:
>>>  
>>> I thought about adding some prints to see what's causing the hang, the
>>> reservations or their absence. Can you replace the debug patch with this
>>> one:
>>>
>>> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
>>> index 776fc9b3fafe..a10ac252dbcc 100644
>>> --- a/arch/x86/kernel/setup.c
>>> +++ b/arch/x86/kernel/setup.c
>>> @@ -600,10 +600,13 @@ static bool __init snb_gfx_workaround_needed(void)
>>>  		return false;
>>>  
>>>  	vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
>>> +	devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
>>> +
>>> +	pr_info("%s: vendor: %x, device: %x\n", __func__, vendor, device);
>>
>> s/device)/devid)/
>  
> Oh, sorry.
> 
>>> +
>>>  	if (vendor != 0x8086)
>>>  		return false;
>>>  
>>> -	devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
>>>  	for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
>>>  		if (devid == snb_ids[i])
>>>  			return true;
>>
>> That prints:
>>
>> [    0.000000] snb_gfx_workaround_needed: vendor: 8086, device: 126
>> [    0.000000] early_reserve_memory: snb_gfx: 1
>> ...
>> [    0.014061] snb_gfx_workaround_needed: vendor: 8086, device: 126
>> [    0.014064] reserving inaccessible SNB gfx pages
>>
>>
>> The full boot log is attached.
>  
> Can you please send the log with memblock=debug added to the kernel command
> line?
> 
> Probably should have started from this...
> 

It's attached.

-- 
~Randy
{bedtime}

Attachment: boot0409-memblk-debug.log.gz
Description: application/gzip