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
next prev parent 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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