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mm/gup_benchmark.c: add additional pinning methods

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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/[email protected]
Signed-off-by: Keith Busch <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Dan Williams <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Keith Busch 2018-10-26 15:09:56 -07:00 • committed by Linus Torvalds
commit 714a3a1eba
2 changed files with 37 additions and 4 deletions
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28
mm/gup_benchmark.c
View file

@ -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;