From: Peter Xu <peterx@redhat.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: David Hildenbrand <david@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Leonardo Bras Soares Passos <lsoaresp@redhat.com>,
peterx@redhat.com, Andrea Arcangeli <aarcange@redhat.com>,
Nadav Amit <nadav.amit@gmail.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Axel Rasmussen <axelrasmussen@google.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Mike Rapoport <rppt@kernel.org>
Subject: [PATCH v2 17/31] selftests/mm: Drop global mem_fd in uffd tests
Date: Wed, 12 Apr 2023 12:43:31 -0400 [thread overview]
Message-ID: <20230412164331.328584-1-peterx@redhat.com> (raw)
In-Reply-To: <20230412163922.327282-1-peterx@redhat.com>
Drop it by creating the memfd dynamically in the tests.
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
tools/testing/selftests/mm/uffd-common.c | 28 +++++++++++++++++++++++-
tools/testing/selftests/mm/uffd-common.h | 2 +-
tools/testing/selftests/mm/uffd-stress.c | 15 -------------
3 files changed, 28 insertions(+), 17 deletions(-)
diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c
index 09ea24c5f02c..b1617f5d4517 100644
--- a/tools/testing/selftests/mm/uffd-common.c
+++ b/tools/testing/selftests/mm/uffd-common.c
@@ -12,12 +12,32 @@
volatile bool test_uffdio_copy_eexist = true;
unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size, hpage_size;
char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
-int mem_fd, uffd = -1, uffd_flags, finished, *pipefd, test_type;
+int uffd = -1, uffd_flags, finished, *pipefd, test_type;
bool map_shared, test_collapse, test_dev_userfaultfd;
bool test_uffdio_wp = true, test_uffdio_minor = false;
unsigned long long *count_verify;
uffd_test_ops_t *uffd_test_ops;
+static int uffd_mem_fd_create(off_t mem_size, bool hugetlb)
+{
+ unsigned int memfd_flags = 0;
+ int mem_fd;
+
+ if (hugetlb)
+ memfd_flags = MFD_HUGETLB;
+ mem_fd = memfd_create("uffd-test", memfd_flags);
+ if (mem_fd < 0)
+ err("memfd_create");
+ if (ftruncate(mem_fd, mem_size))
+ err("ftruncate");
+ if (fallocate(mem_fd,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0,
+ mem_size))
+ err("fallocate");
+
+ return mem_fd;
+}
+
static void anon_release_pages(char *rel_area)
{
if (madvise(rel_area, nr_pages * page_size, MADV_DONTNEED))
@@ -51,6 +71,7 @@ static void hugetlb_allocate_area(void **alloc_area, bool is_src)
off_t offset = is_src ? 0 : size;
void *area_alias = NULL;
char **alloc_area_alias;
+ int mem_fd = uffd_mem_fd_create(size * 2, true);
*alloc_area = mmap(NULL, size, PROT_READ | PROT_WRITE,
(map_shared ? MAP_SHARED : MAP_PRIVATE) |
@@ -73,6 +94,8 @@ static void hugetlb_allocate_area(void **alloc_area, bool is_src)
}
if (area_alias)
*alloc_area_alias = area_alias;
+
+ close(mem_fd);
}
static void hugetlb_alias_mapping(__u64 *start, size_t len, unsigned long offset)
@@ -95,6 +118,7 @@ static void shmem_allocate_area(void **alloc_area, bool is_src)
size_t bytes = nr_pages * page_size;
unsigned long offset = is_src ? 0 : bytes;
char *p = NULL, *p_alias = NULL;
+ int mem_fd = uffd_mem_fd_create(bytes * 2, false);
if (test_collapse) {
p = BASE_PMD_ADDR;
@@ -124,6 +148,8 @@ static void shmem_allocate_area(void **alloc_area, bool is_src)
area_src_alias = area_alias;
else
area_dst_alias = area_alias;
+
+ close(mem_fd);
}
static void shmem_alias_mapping(__u64 *start, size_t len, unsigned long offset)
diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
index 11f770391bd9..0dfab7057295 100644
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -87,7 +87,7 @@ typedef struct uffd_test_ops uffd_test_ops_t;
extern unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size, hpage_size;
extern char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
-extern int mem_fd, uffd, uffd_flags, finished, *pipefd, test_type;
+extern int uffd, uffd_flags, finished, *pipefd, test_type;
extern bool map_shared, test_collapse, test_dev_userfaultfd;
extern bool test_uffdio_wp, test_uffdio_minor;
extern unsigned long long *count_verify;
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c
index e6d39a755082..4eca1a0276c2 100644
--- a/tools/testing/selftests/mm/uffd-stress.c
+++ b/tools/testing/selftests/mm/uffd-stress.c
@@ -1090,21 +1090,6 @@ int main(int argc, char **argv)
}
nr_pages = nr_pages_per_cpu * nr_cpus;
- if (test_type == TEST_SHMEM || test_type == TEST_HUGETLB) {
- unsigned int memfd_flags = 0;
-
- if (test_type == TEST_HUGETLB)
- memfd_flags = MFD_HUGETLB;
- mem_fd = memfd_create(argv[0], memfd_flags);
- if (mem_fd < 0)
- err("memfd_create");
- if (ftruncate(mem_fd, nr_pages * page_size * 2))
- err("ftruncate");
- if (fallocate(mem_fd,
- FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0,
- nr_pages * page_size * 2))
- err("fallocate");
- }
printf("nr_pages: %lu, nr_pages_per_cpu: %lu\n",
nr_pages, nr_pages_per_cpu);
return userfaultfd_stress();
--
2.39.1
next prev parent reply other threads:[~2023-04-12 16:43 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 16:38 [PATCH v2 00/31] selftests/mm: Split / Refactor userfault test Peter Xu
2023-04-12 16:38 ` [PATCH v2 01/31] Revert "userfaultfd: don't fail on unrecognized features" Peter Xu
2023-04-12 16:41 ` [PATCH v2 02/31] selftests/mm: Update .gitignore with two missing tests Peter Xu
2023-04-12 16:41 ` [PATCH v2 03/31] selftests/mm: Dump a summary in run_vmtests.sh Peter Xu
2023-04-12 16:41 ` [PATCH v2 04/31] selftests/mm: Merge util.h into vm_util.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 05/31] selftests/mm: Use TEST_GEN_PROGS where proper Peter Xu
2023-04-15 15:44 ` Lorenzo Stoakes
2023-04-12 16:42 ` [PATCH v2 06/31] selftests/mm: Link vm_util.c always Peter Xu
2023-04-12 16:42 ` [PATCH v2 07/31] selftests/mm: Merge default_huge_page_size() into one Peter Xu
2023-04-12 16:42 ` [PATCH v2 08/31] selftests/mm: Use PM_* macros in vm_utils.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 09/31] selftests/mm: Reuse pagemap_get_entry() in vm_util.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 10/31] selftests/mm: Test UFFDIO_ZEROPAGE only when !hugetlb Peter Xu
2023-04-12 17:07 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 11/31] selftests/mm: Drop test_uffdio_zeropage_eexist Peter Xu
2023-04-12 16:42 ` [PATCH v2 12/31] selftests/mm: Create uffd-common.[ch] Peter Xu
2023-04-12 17:59 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 13/31] selftests/mm: Split uffd tests into uffd-stress and uffd-unit-tests Peter Xu
2023-04-12 18:03 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 14/31] selftests/mm: uffd_[un]register() Peter Xu
2023-04-12 18:20 ` Axel Rasmussen
2023-04-12 19:33 ` Peter Xu
2023-04-12 16:42 ` [PATCH v2 15/31] selftests/mm: uffd_open_{dev|sys}() Peter Xu
2023-04-12 18:25 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 16/31] selftests/mm: UFFDIO_API test Peter Xu
2023-04-12 19:47 ` Axel Rasmussen
2023-04-12 20:08 ` Peter Xu
2023-04-20 10:54 ` Mike Rapoport
2023-04-12 16:43 ` Peter Xu [this message]
2023-04-12 16:43 ` [PATCH v2 18/31] selftests/mm: Drop global hpage_size in uffd tests Peter Xu
2023-04-12 16:43 ` [PATCH v2 19/31] selftests/mm: Rename uffd_stats to uffd_args Peter Xu
2023-04-20 10:55 ` Mike Rapoport
2023-04-12 16:43 ` [PATCH v2 20/31] selftests/mm: Let uffd_handle_page_fault() take wp parameter Peter Xu
2023-04-12 16:43 ` [PATCH v2 21/31] selftests/mm: Allow allocate_area() to fail properly Peter Xu
2023-04-12 16:43 ` [PATCH v2 22/31] selftests/mm: Add framework for uffd-unit-test Peter Xu
2023-04-12 16:43 ` [PATCH v2 23/31] selftests/mm: Move uffd pagemap test to unit test Peter Xu
2023-04-12 16:43 ` [PATCH v2 24/31] selftests/mm: Move uffd minor " Peter Xu
2023-04-12 16:44 ` [PATCH v2 25/31] selftests/mm: Move uffd sig/events tests into uffd unit tests Peter Xu
2023-04-12 16:44 ` [PATCH v2 26/31] selftests/mm: Move zeropage test " Peter Xu
2023-04-12 16:45 ` [PATCH v2 27/31] selftests/mm: Workaround no way to detect uffd-minor + wp Peter Xu
2023-04-12 16:45 ` [PATCH v2 28/31] selftests/mm: Allow uffd test to skip properly with no privilege Peter Xu
2023-04-12 16:45 ` [PATCH v2 29/31] selftests/mm: Drop sys/dev test in uffd-stress test Peter Xu
2023-04-12 16:45 ` [PATCH v2 30/31] selftests/mm: Add shmem-private test to uffd-stress Peter Xu
2023-04-12 16:45 ` [PATCH v2 31/31] selftests/mm: Add uffdio register ioctls test Peter Xu
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