[PATCH AUTOSEL 6.15 6/8] PM: Restrict swap use to later in the suspend sequence

[Mario Limonciello]

On 7/9/2025 1:39 AM, Pavel Machek wrote:
> 
>> In this instance I honestly haven't read the LLM explanation. I agree
>> with you that the explanation is flawed, but the patch clearly fixes a
>> problem:
>>
>> 	"On AMD dGPUs this can lead to failed suspends under memory
>> 	pressure situations as all VRAM must be evicted to system memory
>> 	or swap."
>>
>> So it was included in the AUTOSEL patchset.
> 
> Is "may fix a problem" the only criteria for -stable inclusion? You
> have been acting as if so. Please update the rules, if so.

I would say that it most definitely does fix a problem.  There are 
multiple testers who have confirmed it.

But as it's rightfully pointed out the environment that drivers have 
during the initial pmops callbacks is different (swap is still available).

I don't expect regressions from this; but wider testing is the only way 
that we will find out.  Either we find out in 6.15.y or we find out in 
6.16.y.  Either way if there are regressions we either revert or fix them.

> 
>>> I assume going forward that AUTOSEL will not consider any patches
>>> involving the core kernel and the user/kernel ABI going forward.  The
>>> areas I have been involved with over the years, and for which my review
>>> might be interesting.
>>
>> The filter is based on authorship and SoBs. Individual maintainers of a
>> subsystem can elect to have their entire subsystem added to the ignore
>> list.
> 
> Then the filter is misdesigned.
> 
> BR,
> 								Pavel
> 
>