The patch titled
Subject: tools/testing/selftests/vm/gup_benchmark.c: allow user specified file
has been added to the -mm tree. Its filename is
tools-gup_benchmark-allow-user-specified-file.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/tools-gup_benchmark-allow-user-specified-file.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/tools-gup_benchmark-allow-user-specified-file.patch
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------------------------------------------------------
From: Keith Busch <keith.busch@xxxxxxxxx>
Subject: tools/testing/selftests/vm/gup_benchmark.c: allow user specified file
Allow a user to specify a file to map by adding a new option, '-f',
providing a means to test various file backings.
If not specified, the benchmark will use a private mapping of /dev/zero,
which produces an anonymous mapping as before.
Link: http://lkml.kernel.org/r/20181010195605.10689-4-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>
---
diff -puN tools/testing/selftests/vm/gup_benchmark.c~tools-gup_benchmark-allow-user-specified-file tools/testing/selftests/vm/gup_benchmark.c
--- a/tools/testing/selftests/vm/gup_benchmark.c~tools-gup_benchmark-allow-user-specified-file
+++ a/tools/testing/selftests/vm/gup_benchmark.c
@@ -31,11 +31,12 @@ int main(int argc, char **argv)
{
struct gup_benchmark gup;
unsigned long size = 128 * MB;
- int i, fd, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
+ int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
int cmd = GUP_FAST_BENCHMARK;
+ char *file = "/dev/zero";
char *p;
- while ((opt = getopt(argc, argv, "m:r:n:tTLU")) != -1) {
+ while ((opt = getopt(argc, argv, "m:r:n:f:tTLU")) != -1) {
switch (opt) {
case 'm':
size = atoi(optarg) * MB;
@@ -61,11 +62,18 @@ int main(int argc, char **argv)
case 'w':
write = 1;
break;
+ case 'f':
+ file = optarg;
+ break;
default:
return -1;
}
}
+ filed = open(file, O_RDWR|O_CREAT);
+ if (filed < 0)
+ perror("open"), exit(filed);
+
gup.nr_pages_per_call = nr_pages;
gup.flags = write;
@@ -73,8 +81,7 @@ int main(int argc, char **argv)
if (fd == -1)
perror("open"), exit(1);
- p = mmap(NULL, size, PROT_READ | PROT_WRITE,
- MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, 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
