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From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Sarthak Sharma <sarthak.sharma@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Lorenzo Stoakes <ljs@kernel.org>,
	"Liam R . Howlett" <liam@infradead.org>,
	Vlastimil Babka <vbabka@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>, Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Jason Gunthorpe <jgg@ziepe.ca>,
	John Hubbard <jhubbard@nvidia.com>, Peter Xu <peterx@redhat.com>,
	Leon Romanovsky <leon@kernel.org>, Zi Yan <ziy@nvidia.com>,
	Baolin Wang <baolin.wang@linux.alibaba.com>,
	Nico Pache <npache@redhat.com>,
	Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
	Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
	Jonathan Corbet <corbet@lwn.net>,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 1/5] selftests/mm: make file helpers return errors
Date: Tue, 21 Jul 2026 16:54:54 +0200	[thread overview]
Message-ID: <cefe62b7-0167-46c1-9fe3-fe7efee90a7e@kernel.org> (raw)
In-Reply-To: <004e11f5-ab21-479d-80a3-64ab89465b85@sirena.org.uk>

On 7/21/26 15:48, Mark Brown wrote:
> On Tue, Jul 21, 2026 at 03:39:09PM +0200, David Hildenbrand (Arm) wrote:
>> On 7/16/26 14:32, Sarthak Sharma wrote:
> 
>>>  	fd = open(path, O_RDONLY);
>>> -	if (fd == -1)
>>> -		return 0;
>>> +	if (fd == -1) {
>>> +		int err = errno;
>>> +
>>> +		printf("# %s: %s (%d)\n", path, strerror(err), err);
> 
>> Shouldn't we be using
> 
>> ksft_print_msg()
> 
>> That does the magic "# " for us.
> 
> Or ksft_perror().


Right, and if we want to move this to tools/lib/mm later, maybe we can just not
print anything and instead only return expressive errnos.

-- 
Cheers,

David

  reply	other threads:[~2026-07-21 14:55 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-16 12:32 [PATCH v5 0/5] selftests/mm: separate GUP microbenchmarking from functional testing Sarthak Sharma
2026-07-16 12:32 ` [PATCH v5 1/5] selftests/mm: make file helpers return errors Sarthak Sharma
2026-07-21 13:39   ` David Hildenbrand (Arm)
2026-07-21 13:48     ` Mark Brown
2026-07-21 14:54       ` David Hildenbrand (Arm) [this message]
2026-07-22  5:24         ` Sarthak Sharma
2026-07-16 12:32 ` [PATCH v5 2/5] tools/lib/mm: add shared file helpers Sarthak Sharma
2026-07-16 12:32 ` [PATCH v5 3/5] tools/lib/mm: move hugepage_settings out of selftests Sarthak Sharma
2026-07-16 12:32 ` [PATCH v5 4/5] tools/mm: add a standalone GUP microbenchmark Sarthak Sharma
2026-07-21 13:52   ` David Hildenbrand (Arm)
2026-07-22  4:38     ` Sarthak Sharma
2026-07-16 12:32 ` [PATCH v5 5/5] selftests/mm: rewrite gup_test as a standalone harness-based selftest Sarthak Sharma
2026-07-20 12:01 ` [PATCH v5 0/5] selftests/mm: separate GUP microbenchmarking from functional testing Sarthak Sharma

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