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authorKeith Busch <keith.busch@intel.com>2018-10-26 15:09:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-26 16:38:15 -0700
commit714a3a1ebafe6e23af55a5c694c308f4044a7e00 (patch)
tree3ae2fe79f50cf9b0dff05e93c8cb69e71752f571 /mm
parent26db3d09d9e1963c9db77cb275bd2d36e56ef57a (diff)
downloadlinux-714a3a1ebafe6e23af55a5c694c308f4044a7e00.tar.bz2
mm/gup_benchmark.c: add additional pinning methods
Provide new gup benchmark ioctl commands to run different user page pinning methods, get_user_pages_longterm() and get_user_pages(), in addition to the existing get_user_pages_fast(). Link: http://lkml.kernel.org/r/20181010195605.10689-2-keith.busch@intel.com Signed-off-by: Keith Busch <keith.busch@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/gup_benchmark.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/mm/gup_benchmark.c b/mm/gup_benchmark.c
index e6aff102373b..debf11388a60 100644
--- a/mm/gup_benchmark.c
+++ b/mm/gup_benchmark.c
@@ -6,6 +6,8 @@
#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)
struct gup_benchmark {
__u64 get_delta_usec;
@@ -43,7 +45,23 @@ static int __gup_benchmark_ioctl(unsigned int cmd,
nr = (next - addr) / PAGE_SIZE;
}
- nr = get_user_pages_fast(addr, nr, gup->flags & 1, pages + i);
+ switch (cmd) {
+ case GUP_FAST_BENCHMARK:
+ nr = get_user_pages_fast(addr, nr, gup->flags & 1,
+ pages + i);
+ break;
+ case GUP_LONGTERM_BENCHMARK:
+ nr = get_user_pages_longterm(addr, nr, gup->flags & 1,
+ pages + i, NULL);
+ break;
+ case GUP_BENCHMARK:
+ nr = get_user_pages(addr, nr, gup->flags & 1, pages + i,
+ NULL);
+ break;
+ default:
+ return -1;
+ }
+
if (nr <= 0)
break;
i += nr;
@@ -72,8 +90,14 @@ static long gup_benchmark_ioctl(struct file *filep, unsigned int cmd,
struct gup_benchmark gup;
int ret;
- if (cmd != GUP_FAST_BENCHMARK)
+ switch (cmd) {
+ case GUP_FAST_BENCHMARK:
+ case GUP_LONGTERM_BENCHMARK:
+ case GUP_BENCHMARK:
+ break;
+ default:
return -EINVAL;
+ }
if (copy_from_user(&gup, (void __user *)arg, sizeof(gup)))
return -EFAULT;