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selftests/mm: rename uffd_stats to uffd_args

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Prepare for adding more fields into the struct.

Link: https://lkml.kernel.org/r/20230412164337.328607-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Suggested-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu
2023-04-12 12:43:37 -04:00
committed by Andrew Morton
parent 265818ef98
commit 508340845d
3 changed files with 42 additions and 43 deletions
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28
tools/testing/selftests/mm/uffd-common.c
View File

@@ -186,34 +186,34 @@ struct uffd_test_ops hugetlb_uffd_test_ops = {
.check_pmd_mapping = NULL,
};
void uffd_stats_report(struct uffd_stats *stats, int n_cpus)
void uffd_stats_report(struct uffd_args *args, int n_cpus)
{
int i;
unsigned long long miss_total = 0, wp_total = 0, minor_total = 0;
for (i = 0; i < n_cpus; i++) {
miss_total += stats[i].missing_faults;
wp_total += stats[i].wp_faults;
minor_total += stats[i].minor_faults;
miss_total += args[i].missing_faults;
wp_total += args[i].wp_faults;
minor_total += args[i].minor_faults;
}
printf("userfaults: ");
if (miss_total) {
printf("%llu missing (", miss_total);
for (i = 0; i < n_cpus; i++)
printf("%lu+", stats[i].missing_faults);
printf("%lu+", args[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("%lu+", args[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("%lu+", args[i].minor_faults);
printf("\b)");
}
printf("\n");
@@ -397,7 +397,7 @@ int uffd_read_msg(int ufd, struct uffd_msg *msg)
return 0;
}
void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_stats *stats)
void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args)
{
unsigned long offset;
@@ -407,7 +407,7 @@ void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_stats *stats)
if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WP) {
/* Write protect page faults */
wp_range(uffd, msg->arg.pagefault.address, page_size, false);
stats->wp_faults++;
args->wp_faults++;
} else if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_MINOR) {
uint8_t *area;
int b;
@@ -430,7 +430,7 @@ void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_stats *stats)
for (b = 0; b < page_size; ++b)
area[b] = ~area[b];
continue_range(uffd, msg->arg.pagefault.address, page_size);
stats->minor_faults++;
args->minor_faults++;
} else {
/*
* Missing page faults.
@@ -460,14 +460,14 @@ void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_stats *stats)
offset &= ~(page_size-1);
if (copy_page(uffd, offset))
stats->missing_faults++;
args->missing_faults++;
}
}
void *uffd_poll_thread(void *arg)
{
struct uffd_stats *stats = (struct uffd_stats *)arg;
unsigned long cpu = stats->cpu;
struct uffd_args *args = (struct uffd_args *)arg;
unsigned long cpu = args->cpu;
struct pollfd pollfd[2];
struct uffd_msg msg;
struct uffdio_register uffd_reg;
@@ -502,7 +502,7 @@ void *uffd_poll_thread(void *arg)
err("unexpected msg event %u\n", msg.event);
break;
case UFFD_EVENT_PAGEFAULT:
uffd_handle_page_fault(&msg, stats);
uffd_handle_page_fault(&msg, args);
break;
case UFFD_EVENT_FORK:
close(uffd);

6
tools/testing/selftests/mm/uffd-common.h
View File

@@ -70,7 +70,7 @@
- 1)))
/* Userfaultfd test statistics */
struct uffd_stats {
struct uffd_args {
int cpu;
unsigned long missing_faults;
unsigned long wp_faults;
@@ -98,12 +98,12 @@ extern uffd_test_ops_t shmem_uffd_test_ops;
extern uffd_test_ops_t hugetlb_uffd_test_ops;
extern uffd_test_ops_t *uffd_test_ops;
void uffd_stats_report(struct uffd_stats *stats, int n_cpus);
void uffd_stats_report(struct uffd_args *args, int n_cpus);
void uffd_test_ctx_init(uint64_t features);
void userfaultfd_open(uint64_t *features);
int uffd_read_msg(int ufd, struct uffd_msg *msg);
void wp_range(int ufd, __u64 start, __u64 len, bool wp);
void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_stats *stats);
void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args);
int __copy_page(int ufd, unsigned long offset, bool retry);
int copy_page(int ufd, unsigned long offset);
void *uffd_poll_thread(void *arg);

51
tools/testing/selftests/mm/uffd-stress.c
View File

@@ -90,16 +90,15 @@ static void usage(void)
exit(1);
}
static void uffd_stats_reset(struct uffd_stats *uffd_stats,
unsigned long n_cpus)
static void uffd_stats_reset(struct uffd_args *args, unsigned long n_cpus)
{
int i;
for (i = 0; i < n_cpus; i++) {
uffd_stats[i].cpu = i;
uffd_stats[i].missing_faults = 0;
uffd_stats[i].wp_faults = 0;
uffd_stats[i].minor_faults = 0;
args[i].cpu = i;
args[i].missing_faults = 0;
args[i].wp_faults = 0;
args[i].minor_faults = 0;
}
}
@@ -163,7 +162,7 @@ pthread_mutex_t uffd_read_mutex = PTHREAD_MUTEX_INITIALIZER;
static void *uffd_read_thread(void *arg)
{
struct uffd_stats *stats = (struct uffd_stats *)arg;
struct uffd_args *args = (struct uffd_args *)arg;
struct uffd_msg msg;
pthread_mutex_unlock(&uffd_read_mutex);
@@ -172,7 +171,7 @@ static void *uffd_read_thread(void *arg)
for (;;) {
if (uffd_read_msg(uffd, &msg))
continue;
uffd_handle_page_fault(&msg, stats);
uffd_handle_page_fault(&msg, args);
}
return NULL;
@@ -210,7 +209,7 @@ static void *background_thread(void *arg)
return NULL;
}
static int stress(struct uffd_stats *uffd_stats)
static int stress(struct uffd_args *args)
{
unsigned long cpu;
pthread_t locking_threads[nr_cpus];
@@ -225,12 +224,12 @@ static int stress(struct uffd_stats *uffd_stats)
if (bounces & BOUNCE_POLL) {
if (pthread_create(&uffd_threads[cpu], &attr,
uffd_poll_thread,
(void *)&uffd_stats[cpu]))
(void *)&args[cpu]))
return 1;
} else {
if (pthread_create(&uffd_threads[cpu], &attr,
uffd_read_thread,
(void *)&uffd_stats[cpu]))
(void *)&args[cpu]))
return 1;
pthread_mutex_lock(&uffd_read_mutex);
}
@@ -264,7 +263,7 @@ static int stress(struct uffd_stats *uffd_stats)
if (write(pipefd[cpu*2+1], &c, 1) != 1)
err("pipefd write error");
if (pthread_join(uffd_threads[cpu],
(void *)&uffd_stats[cpu]))
(void *)&args[cpu]))
return 1;
} else {
if (pthread_cancel(uffd_threads[cpu]))
@@ -493,7 +492,7 @@ static int userfaultfd_events_test(void)
int err, features;
pid_t pid;
char c;
struct uffd_stats stats = { 0 };
struct uffd_args args = { 0 };
printf("testing events (fork, remap, remove): ");
fflush(stdout);
@@ -508,7 +507,7 @@ static int userfaultfd_events_test(void)
true, test_uffdio_wp, false))
err("register failure");
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args))
err("uffd_poll_thread create");
pid = fork();
@@ -526,9 +525,9 @@ static int userfaultfd_events_test(void)
if (pthread_join(uffd_mon, NULL))
return 1;
uffd_stats_report(&stats, 1);
uffd_stats_report(&args, 1);
return stats.missing_faults != nr_pages;
return args.missing_faults != nr_pages;
}
static int userfaultfd_sig_test(void)
@@ -538,7 +537,7 @@ static int userfaultfd_sig_test(void)
int err, features;
pid_t pid;
char c;
struct uffd_stats stats = { 0 };
struct uffd_args args = { 0 };
printf("testing signal delivery: ");
fflush(stdout);
@@ -557,7 +556,7 @@ static int userfaultfd_sig_test(void)
uffd_test_ops->release_pages(area_dst);
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args))
err("uffd_poll_thread create");
pid = fork();
@@ -606,7 +605,7 @@ static int userfaultfd_minor_test(void)
unsigned long p;
pthread_t uffd_mon;
char c;
struct uffd_stats stats = { 0 };
struct uffd_args args = { 0 };
if (!test_uffdio_minor)
return 0;
@@ -629,7 +628,7 @@ static int userfaultfd_minor_test(void)
page_size);
}
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args))
err("uffd_poll_thread create");
/*
@@ -645,7 +644,7 @@ static int userfaultfd_minor_test(void)
if (pthread_join(uffd_mon, NULL))
return 1;
uffd_stats_report(&stats, 1);
uffd_stats_report(&args, 1);
if (test_collapse) {
printf("testing collapse of uffd memory into PMD-mapped THPs:");
@@ -664,7 +663,7 @@ static int userfaultfd_minor_test(void)
printf(" done.\n");
}
return stats.missing_faults != 0 || stats.minor_faults != nr_pages;
return args.missing_faults != 0 || args.minor_faults != nr_pages;
}
static int pagemap_open(void)
@@ -822,7 +821,7 @@ static int userfaultfd_stress(void)
{
void *area;
unsigned long nr;
struct uffd_stats uffd_stats[nr_cpus];
struct uffd_args args[nr_cpus];
uint64_t mem_size = nr_pages * page_size;
uffd_test_ctx_init(UFFD_FEATURE_WP_UNPOPULATED);
@@ -894,10 +893,10 @@ static int userfaultfd_stress(void)
*/
uffd_test_ops->release_pages(area_dst);
uffd_stats_reset(uffd_stats, nr_cpus);
uffd_stats_reset(args, nr_cpus);
/* bounce pass */
if (stress(uffd_stats))
if (stress(args))
return 1;
/* Clear all the write protections if there is any */
@@ -926,7 +925,7 @@ static int userfaultfd_stress(void)
swap(area_src_alias, area_dst_alias);
uffd_stats_report(uffd_stats, nr_cpus);
uffd_stats_report(args, nr_cpus);
}
if (test_type == TEST_ANON) {