Re: [PATCH] selftests: mm: fix and speedup "droppable" test

["David Hildenbrand (Arm)" <david@kernel.org>]

>> +		/*
>> +		 * Speculative reference can temporarily prevent some
>> +		 * pages from getting dropped. So sleep and retry.
>> +		 *
>> +		 * If a page is not droppable for 10s, something
>> +		 * is seriously messed up and we want to fail.
>> +		 */
>> +		if (dropped)
>> +			break;
>> +		sleep(1);
>>  	}
>> -	kill(child, SIGTERM);
>>  
>> -	ksft_test_result_pass("MAP_DROPPABLE: PASS\n");
>> -	exit(KSFT_PASS);
>> +	ksft_test_result(dropped, "madvise(MADV_PAGEOUT) behavior\n");
> 
> You meant "MAP_DROPPABLE" behaviour? Perhaps that can be folded in.

No, I did mean "madvise(MADV_PAGEOUT)" behaves as expected with droppable pages.

Reasoning being that we might want to add some other tests in the future that
trigger reclaim differently.

Thanks!

-- 
Cheers,

David