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FROMGIT: userfaultfd/selftests: only dump counts if mode enabled

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WP and MINOR modes are conditionally enabled on specific memory types.
This patch avoids dumping tons of zeros for those cases when the modes are
not supported at all.

Link: https://lkml.kernel.org/r/20210310004511.51996-5-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

(cherry picked from commit 9be04682576f216acd45896591874663ebc6a0ad
https: //git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm)
Link: https://lore.kernel.org/patchwork/patch/1392476/
Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Bug: 160737021
Bug: 169683130
Change-Id: Ib906578b0981642d84e82b2e3cdfcd93287e29c4
This commit is contained in:
Peter Xu
2021-03-18 17:01:53 +11:00
committed by Todd Kjos
parent f4ab74004a
commit 642412b1ac
1 changed files with 20 additions and 10 deletions
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30
tools/testing/selftests/vm/userfaultfd.c
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@@ -164,16 +164,26 @@ static void uffd_stats_report(struct uffd_stats *stats, int n_cpus)
minor_total += stats[i].minor_faults;
}
printf("userfaults: %llu missing (", miss_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].missing_faults);
printf("\b), %llu wp (", wp_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].wp_faults);
printf("\b), %llu minor (", minor_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].minor_faults);
printf("\b)\n");
printf("userfaults: ");
if (miss_total) {
printf("%llu missing (", miss_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].missing_faults);
printf("\b) ");
}
if (wp_total) {
printf("%llu wp (", wp_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].wp_faults);
printf("\b) ");
}
if (minor_total) {
printf("%llu minor (", minor_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].minor_faults);
printf("\b)");
}
printf("\n");
}
static int anon_release_pages(char *rel_area)