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b=FRGv6TDdb/CbTs0XqVEWfWFufNO6r11Sec9GNZCu99m074cH+9gDMKx7EQ9tMQXBr OnRF/W9n//CCRHlK5PsY0adB2obxDy/gafQUEoS1jqc49gRe9eUslf+dK1p6MCuU8u tNU8US+6mfWjCUyeg6jrteBEwdQurFTU8bWNXfuqjQApqOwtM3boYCfOqgAsSMhuXX 0xKKg0xcWwkoiM9B9sGTLwNZps5/PB+Z1zmmPL5P/zaNKKUjIXPMhJPRZyC3eK3HPi 7QPSxFZkflveXtdsasyl+8jWzH1UfnZa2eo3fE9f5lHmsNVU9pjx3OAreNFQRhfYiJ Ru9sNP6eyUrog== Message-ID: Date: Thu, 16 Apr 2026 10:39:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/3] selftests/mm: run the MAP_DROPPABLE selftest To: Anthony Yznaga , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: akpm@linux-foundation.org, ljs@kernel.org, Liam.Howlett@oracle.com, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jannh@google.com, pfalcato@suse.de, Jason@zx2c4.com, shuah@kernel.org References: <20260416033939.49981-1-anthony.yznaga@oracle.com> <20260416033939.49981-4-anthony.yznaga@oracle.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 528948000B X-Stat-Signature: mqm8i1egbyjm43t1wpeuqpps4xrffg84 X-HE-Tag: 1776328804-332117 X-HE-Meta: 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 Iil02Okb UqHQReAIDTUbMCp+y46v5ZQ5Dcw1l91qufE8gtOifVboKLjQUOjksKwJ8gx8QikQEfv6DrkbkTD5nlOc0aLVuDdEQgkreq5rhgToYtMCdaNf18RPif+0+0omVIV+LgSYXI5ZDHMaXtvcjuOnctd6r3o6OYZdMZ6xTKdDQcHPwDzO5Fw79reg3yCNQ3Pwak2VEtgkD2KM8Xyc6jWZfs02CudxEP8mQT79qxSMaCWawGP4xuIZFw3ElOVE4HkZwFWxRbNWOtv5lOWGO3iB8vY85lOEl6JSIobo2mz0E239+5/abJMq90n7q7XvCmldVoCa+gU/hviU8KOml3Kz/62MovkouXuLRwvwh8F+T Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/16/26 05:39, Anthony Yznaga wrote: > The test was not being run by the selftest framework so it was never > noticed that it would fail with an assertion failure on configs without > support for MAP_DROPPABLE. Update the test so that it is skipped instead > when MAP_DROPPABLE is not supported, and add it to the mmap category so > that the test is run by the framework. > > Signed-off-by: Anthony Yznaga > --- > tools/testing/selftests/mm/droppable.c | 9 ++++++++- > tools/testing/selftests/mm/run_vmtests.sh | 1 + > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/mm/droppable.c b/tools/testing/selftests/mm/droppable.c > index 44940f75c461..30c8be37fcb9 100644 > --- a/tools/testing/selftests/mm/droppable.c > +++ b/tools/testing/selftests/mm/droppable.c > @@ -26,7 +26,14 @@ int main(int argc, char *argv[]) > ksft_set_plan(1); > > alloc = mmap(0, alloc_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_DROPPABLE, -1, 0); > - assert(alloc != MAP_FAILED); > + if (alloc == MAP_FAILED) { > + if ((errno == EOPNOTSUPP) || (errno == EINVAL)) { > + ksft_test_result_skip("MAP_DROPPABLE not supported\n"); > + exit(KSFT_SKIP); > + } > + ksft_test_result_fail("mmap error: %s\n", strerror(errno)); > + exit(KSFT_FAIL); > + } > memset(alloc, 'A', alloc_size); > for (size_t i = 0; i < alloc_size; i += page_size) > assert(*(uint8_t *)(alloc + i)); > diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh > index d8468451b3a3..e1e355d50e65 100755 > --- a/tools/testing/selftests/mm/run_vmtests.sh > +++ b/tools/testing/selftests/mm/run_vmtests.sh > @@ -382,6 +382,7 @@ else > fi > > CATEGORY="mmap" run_test ./map_populate > +CATEGORY="mmap" run_test ./droppable > > CATEGORY="mlock" run_test ./mlock-random-test > On my older kernel: $ ./droppable TAP version 13 1..1 ok 1 # SKIP MAP_DROPPABLE not supported Acked-by: David Hildenbrand (Arm) -- Cheers, David