On 20.03.23 16:31, Dave Hansen wrote:
> On 3/20/23 06:49, Juergen Gross wrote:
>>>>
>>>> @@ -750,6 +750,7 @@ static int __init mtrr_init_finialize(void)
>>>>         * TBD: is there any system with such CPU which supports
>>>>         * suspend/resume? If no, we should remove the code.
>>>>         */
>>>> +    mtrr_value = kcalloc(num_var_ranges, sizeof(*mtrr_value),
>>>> GFP_KERNEL);
>>>
>>> Theoretically dynamic allocation can fail, although it should not
>>> happen as this
>>> happens during kernel boot and the size is small.  Maybe a WARN()?
>>
>> Fine with me.
> 
> What *actually* happens if the system is running out of memory and this
> is the _first_ failure?  Does a WARN_ON() here help someone debug what
> is going on?

Good question. Especially as we don't set __GFP_NOWARN here.


Juergen