The patch titled
Subject: radix tree test suite: check multiorder iteration
has been added to the -mm tree. Its filename is
radix-tree-test-suite-check-multiorder-iteration.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/radix-tree-test-suite-check-multiorder-iteration.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/radix-tree-test-suite-check-multiorder-iteration.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Subject: radix tree test suite: check multiorder iteration
The random iteration test only inserts order-0 entries currently. Update
it to insert entries of order between 7 and 0. Also make the maximum
index configurable, make some variables static, make the test duration
variable, remove some useless spinning, and add a fifth thread which calls
tag_tagged_items().
Link: http://lkml.kernel.org/r/1480369871-5271-62-git-send-email-mawilcox@xxxxxxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Tested-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/radix-tree/iteration_check.c | 80 +++++++++++--------
tools/testing/radix-tree/main.c | 3
tools/testing/radix-tree/multiorder.c | 23 +++++
tools/testing/radix-tree/test.h | 2
4 files changed, 73 insertions(+), 35 deletions(-)
diff -puN tools/testing/radix-tree/iteration_check.c~radix-tree-test-suite-check-multiorder-iteration tools/testing/radix-tree/iteration_check.c
--- a/tools/testing/radix-tree/iteration_check.c~radix-tree-test-suite-check-multiorder-iteration
+++ a/tools/testing/radix-tree/iteration_check.c
@@ -16,26 +16,36 @@
#include <pthread.h>
#include "test.h"
-#define NUM_THREADS 4
-#define TAG 0
+#define NUM_THREADS 5
+#define MAX_IDX 100
+#define TAG 0
+#define NEW_TAG 1
+
static pthread_mutex_t tree_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_t threads[NUM_THREADS];
static unsigned int seeds[3];
-RADIX_TREE(tree, GFP_KERNEL);
-bool test_complete;
+static RADIX_TREE(tree, GFP_KERNEL);
+static bool test_complete;
+static int max_order;
/* relentlessly fill the tree with tagged entries */
static void *add_entries_fn(void *arg)
{
- int pgoff;
-
rcu_register_thread();
while (!test_complete) {
- for (pgoff = 0; pgoff < 100; pgoff++) {
+ unsigned long pgoff;
+ int order;
+
+ for (pgoff = 0; pgoff < MAX_IDX; pgoff++) {
pthread_mutex_lock(&tree_lock);
- if (item_insert(&tree, pgoff) == 0)
- item_tag_set(&tree, pgoff, TAG);
+ for (order = max_order; order >= 0; order--) {
+ if (item_insert_order(&tree, pgoff, order)
+ == 0) {
+ item_tag_set(&tree, pgoff, TAG);
+ break;
+ }
+ }
pthread_mutex_unlock(&tree_lock);
}
}
@@ -62,14 +72,7 @@ static void *tagged_iteration_fn(void *a
while (!test_complete) {
rcu_read_lock();
radix_tree_for_each_tagged(slot, &tree, &iter, 0, TAG) {
- void *entry;
- int i;
-
- /* busy wait to let removals happen */
- for (i = 0; i < 1000000; i++)
- ;
-
- entry = radix_tree_deref_slot(slot);
+ void *entry = radix_tree_deref_slot(slot);
if (unlikely(!entry))
continue;
@@ -110,14 +113,7 @@ static void *untagged_iteration_fn(void
while (!test_complete) {
rcu_read_lock();
radix_tree_for_each_slot(slot, &tree, &iter, 0) {
- void *entry;
- int i;
-
- /* busy wait to let removals happen */
- for (i = 0; i < 1000000; i++)
- ;
-
- entry = radix_tree_deref_slot(slot);
+ void *entry = radix_tree_deref_slot(slot);
if (unlikely(!entry))
continue;
@@ -152,7 +148,7 @@ static void *remove_entries_fn(void *arg
while (!test_complete) {
int pgoff;
- pgoff = rand_r(&seeds[2]) % 100;
+ pgoff = rand_r(&seeds[2]) % MAX_IDX;
pthread_mutex_lock(&tree_lock);
item_delete(&tree, pgoff);
@@ -164,36 +160,54 @@ static void *remove_entries_fn(void *arg
return NULL;
}
+static void *tag_entries_fn(void *arg)
+{
+ rcu_register_thread();
+
+ while (!test_complete) {
+ tag_tagged_items(&tree, &tree_lock, 0, MAX_IDX, 10, TAG,
+ NEW_TAG);
+ }
+ rcu_unregister_thread();
+ return NULL;
+}
+
/* This is a unit test for a bug found by the syzkaller tester */
-void iteration_test(void)
+void iteration_test(unsigned order, unsigned test_duration)
{
int i;
- printf("Running iteration tests for 10 seconds\n");
+ printf("Running %siteration tests for %d seconds\n",
+ order > 0 ? "multiorder " : "", test_duration);
+ max_order = order;
test_complete = false;
for (i = 0; i < 3; i++)
seeds[i] = rand();
if (pthread_create(&threads[0], NULL, tagged_iteration_fn, NULL)) {
- perror("pthread_create");
+ perror("create tagged iteration thread");
exit(1);
}
if (pthread_create(&threads[1], NULL, untagged_iteration_fn, NULL)) {
- perror("pthread_create");
+ perror("create untagged iteration thread");
exit(1);
}
if (pthread_create(&threads[2], NULL, add_entries_fn, NULL)) {
- perror("pthread_create");
+ perror("create add entry thread");
exit(1);
}
if (pthread_create(&threads[3], NULL, remove_entries_fn, NULL)) {
- perror("pthread_create");
+ perror("create remove entry thread");
+ exit(1);
+ }
+ if (pthread_create(&threads[4], NULL, tag_entries_fn, NULL)) {
+ perror("create tag entry thread");
exit(1);
}
- sleep(10);
+ sleep(test_duration);
test_complete = true;
for (i = 0; i < NUM_THREADS; i++) {
diff -puN tools/testing/radix-tree/main.c~radix-tree-test-suite-check-multiorder-iteration tools/testing/radix-tree/main.c
--- a/tools/testing/radix-tree/main.c~radix-tree-test-suite-check-multiorder-iteration
+++ a/tools/testing/radix-tree/main.c
@@ -350,7 +350,8 @@ int main(int argc, char **argv)
regression1_test();
regression2_test();
regression3_test();
- iteration_test();
+ iteration_test(0, 10);
+ iteration_test(7, 20);
single_thread_tests(long_run);
/* Free any remaining preallocated nodes */
diff -puN tools/testing/radix-tree/multiorder.c~radix-tree-test-suite-check-multiorder-iteration tools/testing/radix-tree/multiorder.c
--- a/tools/testing/radix-tree/multiorder.c~radix-tree-test-suite-check-multiorder-iteration
+++ a/tools/testing/radix-tree/multiorder.c
@@ -75,8 +75,27 @@ static void __multiorder_tag_test(int in
item_kill_tree(&tree);
}
+static void __multiorder_tag_test2(unsigned order, unsigned long index2)
+{
+ RADIX_TREE(tree, GFP_KERNEL);
+ unsigned long index = (1 << order);
+ index2 += index;
+
+ assert(item_insert_order(&tree, 0, order) == 0);
+ assert(item_insert(&tree, index2) == 0);
+
+ assert(radix_tree_tag_set(&tree, 0, 0));
+ assert(radix_tree_tag_set(&tree, index2, 0));
+
+ assert(tag_tagged_items(&tree, NULL, 0, ~0UL, 10, 0, 1) == 2);
+
+ item_kill_tree(&tree);
+}
+
static void multiorder_tag_tests(void)
{
+ int i, j;
+
/* test multi-order entry for indices 0-7 with no sibling pointers */
__multiorder_tag_test(0, 3);
__multiorder_tag_test(5, 3);
@@ -116,6 +135,10 @@ static void multiorder_tag_tests(void)
__multiorder_tag_test(300, 8);
__multiorder_tag_test(0x12345678UL, 8);
+
+ for (i = 1; i < 10; i++)
+ for (j = 0; j < (10 << i); j++)
+ __multiorder_tag_test2(i, j);
}
static void multiorder_check(unsigned long index, int order)
diff -puN tools/testing/radix-tree/test.h~radix-tree-test-suite-check-multiorder-iteration tools/testing/radix-tree/test.h
--- a/tools/testing/radix-tree/test.h~radix-tree-test-suite-check-multiorder-iteration
+++ a/tools/testing/radix-tree/test.h
@@ -32,7 +32,7 @@ unsigned long find_item(struct radix_tre
void tag_check(void);
void multiorder_checks(void);
-void iteration_test(void);
+void iteration_test(unsigned order, unsigned duration);
void benchmark(void);
struct item *
_
Patches currently in -mm which might be from mawilcox@xxxxxxxxxxxxx are
radix-tree-test-suite-fix-compilation.patch
radix-tree-test-suite-iteration-test-misuses-rcu.patch
radix-tree-test-suite-use-rcu_barrier.patch
radix-tree-test-suite-handle-exceptional-entries.patch
radix-tree-test-suite-record-order-in-each-item.patch
btrfs-fix-race-in-btrfs_free_dummy_fs_info.patch
radix-tree-improve-multiorder-iterators.patch
radix-tree-delete-radix_tree_locate_item.patch
radix-tree-delete-radix_tree_range_tag_if_tagged.patch
radix-tree-fix-replacement-for-multiorder-entries.patch
radix-tree-test-suite-check-multiorder-iteration.patch
tpm-use-idr_find-not-idr_find_slowpath.patch
rxrpc-abstract-away-knowledge-of-idr-internals.patch
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