The patch titled
Subject: userfaultfd: non-cooperative: selftest: introduce userfaultfd_open
has been added to the -mm tree. Its filename is
userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open.patch
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*** 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: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Subject: userfaultfd: non-cooperative: selftest: introduce userfaultfd_open
userfaultfd_open will be needed by the non cooperative selftest.
Link: http://lkml.kernel.org/r/20161216144821.5183-39-aarcange@xxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
Cc: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
Cc: Michael Rapoport <RAPOPORT@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 41 ++++++++++++---------
1 file changed, 25 insertions(+), 16 deletions(-)
diff -puN tools/testing/selftests/vm/userfaultfd.c~userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open tools/testing/selftests/vm/userfaultfd.c
--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -81,7 +81,7 @@ static int huge_fd;
static char *huge_fd_off0;
#endif
static unsigned long long *count_verify;
-static int uffd, finished, *pipefd;
+static int uffd, uffd_flags, finished, *pipefd;
static char *area_src, *area_dst;
static char *zeropage;
pthread_attr_t attr;
@@ -512,23 +512,9 @@ static int stress(unsigned long *userfau
return 0;
}
-static int userfaultfd_stress(void)
+static int userfaultfd_open(void)
{
- void *area;
- char *tmp_area;
- unsigned long nr;
- struct uffdio_register uffdio_register;
struct uffdio_api uffdio_api;
- unsigned long cpu;
- int uffd_flags, err;
- unsigned long userfaults[nr_cpus];
-
- allocate_area((void **)&area_src);
- if (!area_src)
- return 1;
- allocate_area((void **)&area_dst);
- if (!area_dst)
- return 1;
uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
if (uffd < 0) {
@@ -549,6 +535,29 @@ static int userfaultfd_stress(void)
return 1;
}
+ return 0;
+}
+
+static int userfaultfd_stress(void)
+{
+ void *area;
+ char *tmp_area;
+ unsigned long nr;
+ struct uffdio_register uffdio_register;
+ unsigned long cpu;
+ int err;
+ unsigned long userfaults[nr_cpus];
+
+ allocate_area((void **)&area_src);
+ if (!area_src)
+ return 1;
+ allocate_area((void **)&area_dst);
+ if (!area_dst)
+ return 1;
+
+ if (userfaultfd_open() < 0)
+ return 1;
+
count_verify = malloc(nr_pages * sizeof(unsigned long long));
if (!count_verify) {
perror("count_verify");
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxxxxxxx are
userfaultfd-non-cooperative-dup_userfaultfd-use-mm_count-instead-of-mm_users.patch
userfaultfd-introduce-vma_can_userfault.patch
userfaultfd-shmem-add-shmem_mcopy_atomic_pte-for-userfaultfd-support.patch
userfaultfd-shmem-introduce-vma_is_shmem.patch
userfaultfd-shmem-use-shmem_mcopy_atomic_pte-for-shared-memory.patch
userfaultfd-shmem-add-userfaultfd-hook-for-shared-memory-faults.patch
userfaultfd-shmem-allow-registration-of-shared-memory-ranges.patch
userfaultfd-shmem-add-userfaultfd_shmem-test.patch
userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open.patch
userfaultfd-non-cooperative-selftest-add-ufd-parameter-to-copy_page.patch
userfaultfd-non-cooperative-selftest-add-test-for-fork-madvdontneed-and-remap-events.patch
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