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selftests/mm: migration: add setup of HugeTLB pages

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migration skips HugeTLB tests if there are no free huge pages prepared by
a wrapper script.

Add setup of HugeTLB pages to the test and make sure that the original
settings are restored on the test exit.

Since kselftest_harness runs fixture setup and the tests in child
processes, use HUGETLB_SETUP_DEFAULT_PAGES() that defines a constructor
that runs in the main process and add verification that there are enough
free huge pages to the tests that use them.

Reset signal handlers to defaults in FIXTURE_SETUP() so that sending
SIGTERM and SIGHUP during the tests won't cause restoration of HugeTLB
settings.

Link: https://lore.kernel.org/20260511162840.375890-46-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mike Rapoport (Microsoft) 2026-05-11 19:28:29 +03:00 committed by Andrew Morton
parent 496a662f73
commit a73a71aaea
1 changed files with 21 additions and 0 deletions
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21
tools/testing/selftests/mm/migration.c
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@ -23,6 +23,8 @@
#define MAX_RETRIES 100
#define ALIGN(x, a) (((x) + (a - 1)) & (~((a) - 1)))
HUGETLB_SETUP_DEFAULT_PAGES(1)
FIXTURE(migration)
{
pthread_t *threads;
@ -32,10 +34,23 @@ FIXTURE(migration)
int n2;
};
static void reset_signals(void)
{
struct sigaction sa = { .sa_handler = SIG_DFL };
sigemptyset(&sa.sa_mask);
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
}
FIXTURE_SETUP(migration)
{
int n;
reset_signals();
if (numa_available() < 0)
SKIP(return, "NUMA not available");
self->nthreads = numa_num_task_cpus() - 2;
@ -288,6 +303,9 @@ TEST_F_TIMEOUT(migration, private_anon_htlb, 2*RUNTIME)
if (!hugepage_size)
SKIP(return, "Reading HugeTLB pagesize failed");
if (hugetlb_free_default_pages() < 1)
SKIP(return, "Not enough huge pages");
ptr = mmap(NULL, hugepage_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
ASSERT_NE(ptr, MAP_FAILED);
@ -316,6 +334,9 @@ TEST_F_TIMEOUT(migration, shared_anon_htlb, 2*RUNTIME)
if (!hugepage_size)
SKIP(return, "Reading HugeTLB pagesize failed");
if (hugetlb_free_default_pages() < 1)
SKIP(return, "Not enough huge pages");
ptr = mmap(NULL, hugepage_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
ASSERT_NE(ptr, MAP_FAILED);