The patch titled
Subject: selftests/vm: use memfd for hugepage-mremap test
has been added to the -mm mm-unstable branch. Its filename is
selftests-vm-use-memfd-for-hugepage-mremap-test.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-vm-use-memfd-for-hugepage-mremap-test.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: selftests/vm: use memfd for hugepage-mremap test
Date: Fri, 14 Oct 2022 10:40:13 -0400
For dropping the hugetlb mountpoint in run_vmtests.sh. Cleaned it up a
little bit around the changed codes.
Link: https://lkml.kernel.org/r/20221014144013.94027-1-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/hugepage-mremap.c | 21 +++++++----------
1 file changed, 9 insertions(+), 12 deletions(-)
--- a/tools/testing/selftests/vm/hugepage-mremap.c~selftests-vm-use-memfd-for-hugepage-mremap-test
+++ a/tools/testing/selftests/vm/hugepage-mremap.c
@@ -22,6 +22,7 @@
#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <linux/userfaultfd.h>
#include <sys/ioctl.h>
+#include <string.h>
#define DEFAULT_LENGTH_MB 10UL
#define MB_TO_BYTES(x) (x * 1024 * 1024)
@@ -108,26 +109,23 @@ static void register_region_with_uffd(ch
int main(int argc, char *argv[])
{
size_t length = 0;
+ int ret = 0, fd;
- if (argc != 2 && argc != 3) {
- printf("Usage: %s [length_in_MB] <hugetlb_file>\n", argv[0]);
+ if (argc >= 2 && !strcmp(argv[1], "-h")) {
+ printf("Usage: %s [length_in_MB]\n", argv[0]);
exit(1);
}
/* Read memory length as the first arg if valid, otherwise fallback to
* the default length.
*/
- if (argc == 3)
- length = argc > 2 ? (size_t)atoi(argv[1]) : 0UL;
+ if (argc >= 2)
+ length = (size_t)atoi(argv[1]);
+ else
+ length = DEFAULT_LENGTH_MB;
- length = length > 0 ? length : DEFAULT_LENGTH_MB;
length = MB_TO_BYTES(length);
-
- int ret = 0;
-
- /* last arg is the hugetlb file name */
- int fd = open(argv[argc-1], O_CREAT | O_RDWR, 0755);
-
+ fd = memfd_create(argv[0], MFD_HUGETLB);
if (fd < 0) {
perror("Open failed");
exit(1);
@@ -185,7 +183,6 @@ int main(int argc, char *argv[])
}
close(fd);
- unlink(argv[argc-1]);
return ret;
}
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
selftests-vm-use-memfd-for-uffd-hugetlb-tests.patch
selftests-vm-use-memfd-for-hugetlb-madvise-test.patch
selftests-vm-use-memfd-for-hugepage-mremap-test.patch
selftests-vm-drop-mnt-point-for-hugetlb-in-run_vmtestssh.patch
