The patch titled
Subject: memfd-test: run fuse test on hugetlb backend memory
has been added to the -mm tree. Its filename is
memfd-test-run-fuse-test-on-hugetlb-backend-memory.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memfd-test-run-fuse-test-on-hugetlb-backend-memory.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memfd-test-run-fuse-test-on-hugetlb-backend-memory.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Subject: memfd-test: run fuse test on hugetlb backend memory
Link: http://lkml.kernel.org/r/20171107122800.25517-10-marcandre.lureau@xxxxxxxxxx
Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Suggested-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: David Herrmann <dh.herrmann@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/memfd/fuse_test.c | 38 +++++++++++----
tools/testing/selftests/memfd/run_fuse_test.sh | 2
tools/testing/selftests/memfd/run_tests.sh | 1
3 files changed, 32 insertions(+), 9 deletions(-)
diff -puN tools/testing/selftests/memfd/fuse_test.c~memfd-test-run-fuse-test-on-hugetlb-backend-memory tools/testing/selftests/memfd/fuse_test.c
--- a/tools/testing/selftests/memfd/fuse_test.c~memfd-test-run-fuse-test-on-hugetlb-backend-memory
+++ a/tools/testing/selftests/memfd/fuse_test.c
@@ -38,6 +38,8 @@
#define MFD_DEF_SIZE 8192
#define STACK_SIZE 65536
+static size_t mfd_def_size = MFD_DEF_SIZE;
+
static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
{
int r, fd;
@@ -123,7 +125,7 @@ static void *mfd_assert_mmap_shared(int
void *p;
p = mmap(NULL,
- MFD_DEF_SIZE,
+ mfd_def_size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd,
@@ -141,7 +143,7 @@ static void *mfd_assert_mmap_private(int
void *p;
p = mmap(NULL,
- MFD_DEF_SIZE,
+ mfd_def_size,
PROT_READ | PROT_WRITE,
MAP_PRIVATE,
fd,
@@ -174,7 +176,7 @@ static int sealing_thread_fn(void *arg)
usleep(200000);
/* unmount mapping before sealing to avoid i_mmap_writable failures */
- munmap(global_p, MFD_DEF_SIZE);
+ munmap(global_p, mfd_def_size);
/* Try sealing the global file; expect EBUSY or success. Current
* kernels will never succeed, but in the future, kernels might
@@ -224,7 +226,7 @@ static void join_sealing_thread(pid_t pi
int main(int argc, char **argv)
{
- static const char zero[MFD_DEF_SIZE];
+ char *zero;
int fd, mfd, r;
void *p;
int was_sealed;
@@ -235,6 +237,25 @@ int main(int argc, char **argv)
abort();
}
+ if (argc >= 3) {
+ if (!strcmp(argv[2], "hugetlbfs")) {
+ unsigned long hpage_size = default_huge_page_size();
+
+ if (!hpage_size) {
+ printf("Unable to determine huge page size\n");
+ abort();
+ }
+
+ hugetlbfs_test = 1;
+ mfd_def_size = hpage_size * 2;
+ } else {
+ printf("Unknown option: %s\n", argv[2]);
+ abort();
+ }
+ }
+
+ zero = calloc(sizeof(*zero), mfd_def_size);
+
/* open FUSE memfd file for GUP testing */
printf("opening: %s\n", argv[1]);
fd = open(argv[1], O_RDONLY | O_CLOEXEC);
@@ -245,7 +266,7 @@ int main(int argc, char **argv)
/* create new memfd-object */
mfd = mfd_assert_new("kern_memfd_fuse",
- MFD_DEF_SIZE,
+ mfd_def_size,
MFD_CLOEXEC | MFD_ALLOW_SEALING);
/* mmap memfd-object for writing */
@@ -264,7 +285,7 @@ int main(int argc, char **argv)
* This guarantees that the receive-buffer is pinned for 1s until the
* data is written into it. The racing ADD_SEALS should thus fail as
* the pages are still pinned. */
- r = read(fd, p, MFD_DEF_SIZE);
+ r = read(fd, p, mfd_def_size);
if (r < 0) {
printf("read() failed: %m\n");
abort();
@@ -291,10 +312,10 @@ int main(int argc, char **argv)
* enough to avoid any in-flight writes. */
p = mfd_assert_mmap_private(mfd);
- if (was_sealed && memcmp(p, zero, MFD_DEF_SIZE)) {
+ if (was_sealed && memcmp(p, zero, mfd_def_size)) {
printf("memfd sealed during read() but data not discarded\n");
abort();
- } else if (!was_sealed && !memcmp(p, zero, MFD_DEF_SIZE)) {
+ } else if (!was_sealed && !memcmp(p, zero, mfd_def_size)) {
printf("memfd sealed after read() but data discarded\n");
abort();
}
@@ -303,6 +324,7 @@ int main(int argc, char **argv)
close(fd);
printf("fuse: DONE\n");
+ free(zero);
return 0;
}
diff -puN tools/testing/selftests/memfd/run_fuse_test.sh~memfd-test-run-fuse-test-on-hugetlb-backend-memory tools/testing/selftests/memfd/run_fuse_test.sh
--- a/tools/testing/selftests/memfd/run_fuse_test.sh~memfd-test-run-fuse-test-on-hugetlb-backend-memory
+++ a/tools/testing/selftests/memfd/run_fuse_test.sh
@@ -10,6 +10,6 @@ set -e
mkdir mnt
./fuse_mnt ./mnt
-./fuse_test ./mnt/memfd
+./fuse_test ./mnt/memfd $@
fusermount -u ./mnt
rmdir ./mnt
diff -puN tools/testing/selftests/memfd/run_tests.sh~memfd-test-run-fuse-test-on-hugetlb-backend-memory tools/testing/selftests/memfd/run_tests.sh
--- a/tools/testing/selftests/memfd/run_tests.sh~memfd-test-run-fuse-test-on-hugetlb-backend-memory
+++ a/tools/testing/selftests/memfd/run_tests.sh
@@ -60,6 +60,7 @@ fi
# Run the hugetlbfs test
#
./memfd_test hugetlbfs
+./run_fuse_test.sh hugetlbfs
#
# Give back any huge pages allocated for the test
_
Patches currently in -mm which might be from marcandre.lureau@xxxxxxxxxx are
shmem-unexport-shmem_add_seals-shmem_get_seals.patch
shmem-rename-functions-that-are-memfd-related.patch
hugetlb-expose-hugetlbfs_inode_info-in-header.patch
hugetlb-implement-memfd-sealing.patch
shmem-add-sealing-support-to-hugetlb-backed-memfd.patch
memfd-test-test-hugetlbfs-sealing.patch
memfd-test-add-memfd-hugetlb-prefix-when-testing-hugetlbfs.patch
memfd-test-move-common-code-to-a-shared-unit.patch
memfd-test-run-fuse-test-on-hugetlb-backend-memory.patch
mm-page_owner-align-with-pageblock_nr_pages.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
