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Message-ID: <9edbf5f2-efce-40f1-ae7c-34607d9700ce@arm.com>
Date: Thu, 2 Nov 2023 12:04:40 +0000
From: Ryan Roberts <ryan.roberts@....com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>,
Peter Xu <peterx@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Michał Mirosław <emmir@...gle.com>,
Andrei Vagin <avagin@...il.com>,
Danylo Mocherniuk <mdanylo@...gle.com>,
Paul Gofman <pgofman@...eweavers.com>
Cc: Alexander Viro <viro@...iv.linux.org.uk>,
Shuah Khan <shuah@...nel.org>,
Christian Brauner <brauner@...nel.org>,
Yang Shi <shy828301@...il.com>,
Vlastimil Babka <vbabka@...e.cz>,
"Liam R . Howlett" <Liam.Howlett@...cle.com>,
Yun Zhou <yun.zhou@...driver.com>,
Suren Baghdasaryan <surenb@...gle.com>,
Alex Sierra <alex.sierra@....com>,
Matthew Wilcox <willy@...radead.org>,
Pasha Tatashin <pasha.tatashin@...een.com>,
Axel Rasmussen <axelrasmussen@...gle.com>,
"Gustavo A . R . Silva" <gustavoars@...nel.org>,
Dan Williams <dan.j.williams@...el.com>,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
Greg KH <gregkh@...uxfoundation.org>, kernel@...labora.com,
Cyrill Gorcunov <gorcunov@...il.com>,
Mike Rapoport <rppt@...nel.org>, Nadav Amit <namit@...are.com>,
David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v33 6/6] selftests: mm: add pagemap ioctl tests
On 02/11/2023 11:49, Muhammad Usama Anjum wrote:
> On 11/2/23 4:45 PM, Ryan Roberts wrote:
>> On 21/08/2023 15:15, Muhammad Usama Anjum wrote:
>>
>> [...]
>>
>>> +
>>> +
>>> +int init_uffd(void)
>>> +{
>>> + struct uffdio_api uffdio_api;
>>> +
>>> + uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY);
>>> + if (uffd == -1)
>>> + ksft_exit_fail_msg("uffd syscall failed\n");
>>> +
>>> + uffdio_api.api = UFFD_API;
>>> + uffdio_api.features = UFFD_FEATURE_WP_UNPOPULATED | UFFD_FEATURE_WP_ASYNC |
>>> + UFFD_FEATURE_WP_HUGETLBFS_SHMEM;
>>> + if (ioctl(uffd, UFFDIO_API, &uffdio_api))
>>> + ksft_exit_fail_msg("UFFDIO_API\n");
>>> +
>>> + if (!(uffdio_api.api & UFFDIO_REGISTER_MODE_WP) ||
>>> + !(uffdio_api.features & UFFD_FEATURE_WP_UNPOPULATED) ||
>>> + !(uffdio_api.features & UFFD_FEATURE_WP_ASYNC) ||
>>> + !(uffdio_api.features & UFFD_FEATURE_WP_HUGETLBFS_SHMEM))
>>> + ksft_exit_fail_msg("UFFDIO_API error %llu\n", uffdio_api.api);
>>
>> Hi,
>>
>> I've just noticed that this fails on arm64 because the required features are not
>> available. It's common practice to skip instead of fail for this sort of
>> condition (and that's how all the other uffd tests work). The current fail
>> approach creates noise in our CI.
>>
>> I see this is already in mm-stable so perhaps we can add a patch to fix on top?
> Yeah, we can add a patch to skip all the tests instead of failing here. Let
> me send a patch this week.
Thats great - thanks for the fast response!
>
>>
>> Thanks,
>> Ryan
>>
>>
>
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