The patch titled
Subject: tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option
has been added to the -mm tree. Its filename is
tools-gup_benchmark-add-map_shared-option.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/tools-gup_benchmark-add-map_shared-option.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/tools-gup_benchmark-add-map_shared-option.patch
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------------------------------------------------------
From: Keith Busch <keith.busch@xxxxxxxxx>
Subject: tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option
Add a new benchmark option, -S, to request MAP_SHARED. This can be used
to compare with MAP_PRIVATE, or for files that require this option, like
dax.
Link: http://lkml.kernel.org/r/20181010195605.10689-5-keith.busch@xxxxxxxxx
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Kirill Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/tools/testing/selftests/vm/gup_benchmark.c~tools-gup_benchmark-add-map_shared-option
+++ a/tools/testing/selftests/vm/gup_benchmark.c
@@ -32,11 +32,11 @@ int main(int argc, char **argv)
struct gup_benchmark gup;
unsigned long size = 128 * MB;
int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
- int cmd = GUP_FAST_BENCHMARK;
+ int cmd = GUP_FAST_BENCHMARK, flags = MAP_PRIVATE;
char *file = "/dev/zero";
char *p;
- while ((opt = getopt(argc, argv, "m:r:n:f:tTLU")) != -1) {
+ while ((opt = getopt(argc, argv, "m:r:n:f:tTLUS")) != -1) {
switch (opt) {
case 'm':
size = atoi(optarg) * MB;
@@ -65,6 +65,10 @@ int main(int argc, char **argv)
case 'f':
file = optarg;
break;
+ case 'S':
+ flags &= ~MAP_PRIVATE;
+ flags |= MAP_SHARED;
+ break;
default:
return -1;
}
@@ -83,7 +87,7 @@ int main(int argc, char **argv)
if (fd == -1)
perror("open"), exit(1);
- p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, filed, 0);
+ p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0);
if (p == MAP_FAILED)
perror("mmap"), exit(1);
gup.addr = (unsigned long)p;
_
Patches currently in -mm which might be from keith.busch@xxxxxxxxx are
mm-gup_benchmark-time-put_page.patch
mm-gup_benchmark-add-additional-pinning-methods.patch
tools-gup_benchmark-fix-write-flag-usage.patch
tools-gup_benchmark-allow-user-specified-file.patch
tools-gup_benchmark-add-map_shared-option.patch
tools-gup_benchmark-add-map_hugetlb-option.patch
