The patch titled
Subject: mm/gup_benchmark: add LONGTERM_BENCHMARK test in gup fast path
has been added to the -mm tree. Its filename is
mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path.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/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Pingfan Liu <kernelfans@xxxxxxxxx>
Subject: mm/gup_benchmark: add LONGTERM_BENCHMARK test in gup fast path
Introduce a GUP_LONGTERM_BENCHMARK ioctl to test longterm pin in gup fast
path.
Link: http://lkml.kernel.org/r/1560422702-11403-4-git-send-email-kernelfans@xxxxxxxxx
Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/gup_benchmark.c | 11 +++++++++--
tools/testing/selftests/vm/gup_benchmark.c | 10 +++++++---
2 files changed, 16 insertions(+), 5 deletions(-)
--- a/mm/gup_benchmark.c~mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path
+++ a/mm/gup_benchmark.c
@@ -6,8 +6,9 @@
#include <linux/debugfs.h>
#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark)
-#define GUP_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark)
-#define GUP_BENCHMARK _IOWR('g', 3, struct gup_benchmark)
+#define GUP_FAST_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark)
+#define GUP_LONGTERM_BENCHMARK _IOWR('g', 3, struct gup_benchmark)
+#define GUP_BENCHMARK _IOWR('g', 4, struct gup_benchmark)
struct gup_benchmark {
__u64 get_delta_usec;
@@ -53,6 +54,11 @@ static int __gup_benchmark_ioctl(unsigne
nr = get_user_pages_fast(addr, nr, gup->flags & 1,
pages + i);
break;
+ case GUP_FAST_LONGTERM_BENCHMARK:
+ nr = get_user_pages_fast(addr, nr,
+ (gup->flags & 1) | FOLL_LONGTERM,
+ pages + i);
+ break;
case GUP_LONGTERM_BENCHMARK:
nr = get_user_pages(addr, nr,
(gup->flags & 1) | FOLL_LONGTERM,
@@ -96,6 +102,7 @@ static long gup_benchmark_ioctl(struct f
switch (cmd) {
case GUP_FAST_BENCHMARK:
+ case GUP_FAST_LONGTERM_BENCHMARK:
case GUP_LONGTERM_BENCHMARK:
case GUP_BENCHMARK:
break;
--- a/tools/testing/selftests/vm/gup_benchmark.c~mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path
+++ a/tools/testing/selftests/vm/gup_benchmark.c
@@ -15,8 +15,9 @@
#define PAGE_SIZE sysconf(_SC_PAGESIZE)
#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark)
-#define GUP_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark)
-#define GUP_BENCHMARK _IOWR('g', 3, struct gup_benchmark)
+#define GUP_FAST_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark)
+#define GUP_LONGTERM_BENCHMARK _IOWR('g', 3, struct gup_benchmark)
+#define GUP_BENCHMARK _IOWR('g', 4, struct gup_benchmark)
struct gup_benchmark {
__u64 get_delta_usec;
@@ -37,7 +38,7 @@ int main(int argc, char **argv)
char *file = "/dev/zero";
char *p;
- while ((opt = getopt(argc, argv, "m:r:n:f:tTLUSH")) != -1) {
+ while ((opt = getopt(argc, argv, "m:r:n:f:tTlLUSH")) != -1) {
switch (opt) {
case 'm':
size = atoi(optarg) * MB;
@@ -54,6 +55,9 @@ int main(int argc, char **argv)
case 'T':
thp = 0;
break;
+ case 'l':
+ cmd = GUP_FAST_LONGTERM_BENCHMARK;
+ break;
case 'L':
cmd = GUP_LONGTERM_BENCHMARK;
break;
_
Patches currently in -mm which might be from kernelfans@xxxxxxxxx are
mm-gup-rename-nr-as-nr_pinned-in-get_user_pages_fast.patch
mm-gup-fix-omission-of-check-on-foll_longterm-in-gup-fast-path.patch
mm-gup_benchemark-add-longterm_benchmark-test-in-gup-fast-path.patch
