Re: [PATCH v2 3/5] selftests/arm64: Treat KSM merge_across_nodes as optional

[Muhammad Usama Anjum <usama.anjum@arm.com>]

On 21/08/2026 4:43 pm, Mark Brown wrote:
> On Fri, Aug 21, 2026 at 03:15:51PM +0100, Muhammad Usama Anjum wrote:
> 
>> +static bool merge_across_nodes_available(void)
>> +{
>> +	const char *path = PATH_KSM "merge_across_nodes";
>> +
>> +	if (!access(path, R_OK | W_OK))
>> +		return true;
>> +	if (errno == ENOENT)
>> +		return false;
>> +
>> +	ksft_exit_fail_msg("Unable to read and write %s: %s\n", path,
>> +			   strerror(errno));
>> +}
> 
> If prerequistites for the test aren't available I'd expect this to be a
> skip rather than a fail.

You're right. Access to the attribute is a prerequisite rather than the
behavior under test, so I'll report access failures as KSFT_SKIP.

-- 
Thanks,
Usama

-- 
Thanks,
Usama