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Sun, 10 Nov 2024 06:52:13 +0000 (GMT) Message-ID: <433d2870-987d-4d63-a07c-287580e1d6c7@linux.ibm.com> Date: Sun, 10 Nov 2024 12:22:12 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests: hugetlb_dio: Fixup Check for initial conditions to skip in the start To: akpm@linux-foundation.org Cc: Usama.Anjum@collabora.com, kernel@collabora.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, shuah@kernel.org References: <20241109223436.3ddeaf1d60e1ade8f562d757@linux-foundation.org> <20241110064903.23626-1-donettom@linux.ibm.com> Content-Language: en-US From: Donet Tom In-Reply-To: <20241110064903.23626-1-donettom@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 8urxfQY0GAcF7KjpMAmCAf4QA9LoiSQp X-Proofpoint-ORIG-GUID: 8urxfQY0GAcF7KjpMAmCAf4QA9LoiSQp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 malwarescore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 clxscore=1015 impostorscore=0 adultscore=0 mlxscore=0 mlxlogscore=822 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411100058 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 25F1780011 X-Stat-Signature: jk9d35assmp1dy1fx5tqs1yzi7nnhuwy X-Rspam-User: X-HE-Tag: 1731221468-973207 X-HE-Meta: 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 CSvE18fx n0aY9hddEHX0FV4KJwzEeLkasjc871IhnDzA7XYOkPiptKXjQR3XnDfLxD4V+rXTAxEUs4q4U6Cg5IF+/+EutIb8jGxoQpYV/G/MehsXOaHrZVRU2R5d0fL6xFfl+OBYIr1a3q5zDKUIgzYgbJWYdJhKGreGtXhJzu5seopOIXurC6DTU/850QG9Cj6+pvIh+g6KGIhYiuGcV4XnUT2m8YsFXzfoz7lNdiaTA2FEz++gSMrJm1biuJrrrLGuM00uDcPFOvwNR/hBzy+bykTWKgsY1v6JbG1FSuwRhRcILgQpaY4BpZyLr/WkMQ5p+ZYQDxl/ZbI2IQ+/ZcLjvJ9iJaDf0jXORNtrFi+5fG4Ssc6mUuJVkchKFTztTzeSHtzTn3qpKGZ37QHvkdXTgU/vp2ffd55woSbhV/v4j X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 11/10/24 12:19, Donet Tom wrote: > This test verifies that a hugepage, used as a user buffer for > DIO operations, is correctly freed upon unmapping. To test this, > we read the count of free hugepages before and after the mmap, > DIO, and munmap operations, then check if the free hugepage count > is the same. > > Reading free hugepages before the test was removed by commit > 0268d4579901 ('selftests: hugetlb_dio: check for initial conditions > to skip at the start'), causing the test to always fail. > > This patch adds back reading the free hugepages before starting > the test. With this patch, the tests are now passing. > > Test Results without this patch > > ./tools/testing/selftests/mm/hugetlb_dio > TAP version 13 > 1..4 > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 1 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 2 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 3 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 4 : Huge pages not freed! > # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0 > > Test results with this patch. > > ./tools/testing/selftests/mm/hugetlb_dio > TAP version 13 > 1..4 > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 1 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 2 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 3 : Huge pages not freed! > # No. Free pages before allocation : 0 > # No. Free pages after munmap : 100 > not ok 4 : Huge pages not freed! > # Totals: pass:0 fail:4 xfail:0 xpass:0 skip:0 error:0 > > Fixes: 0268d4579901 ("selftests: hugetlb_dio: check for initial conditions to skip in the start") > Signed-off-by: Donet Tom > --- > tools/testing/selftests/mm/hugetlb_dio.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c > index 60001c142ce9..432d5af15e66 100644 > --- a/tools/testing/selftests/mm/hugetlb_dio.c > +++ b/tools/testing/selftests/mm/hugetlb_dio.c > @@ -44,6 +44,13 @@ void run_dio_using_hugetlb(unsigned int start_off, unsigned int end_off) > if (fd < 0) > ksft_exit_fail_perror("Error opening file\n"); > > + /* Get the free huge pages before allocation */ > + free_hpage_b = get_free_hugepages(); > + if (free_hpage_b == 0) { > + close(fd); > + ksft_exit_skip("No free hugepage, exiting!\n"); > + } > + > /* Allocate a hugetlb page */ > orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0); > if (orig_buffer == MAP_FAILED) { > > Hi Andrew Would you prefer I send this fixup patch as a new series, or is it okay as is? Thanks Donet