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authorLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 14:38:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 14:38:01 -0700
commitd42f323a7df0b298c07313db00b44b78555ca8e6 (patch)
treee9ac2b9f20fed683ff78b294c3792acb157787e5 /lib
parent65ec0a7d24913b146cd1500d759b8c340319d55e (diff)
parent4d75136be8bf3ae01b0bc3e725b2cdc921e103bd (diff)
downloadlinux-d42f323a7df0b298c07313db00b44b78555ca8e6.tar.gz
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "A few misc subsystems and some of MM. 175 patches. Subsystems affected by this patch series: ia64, kbuild, scripts, sh, ocfs2, kfifo, vfs, kernel/watchdog, and mm (slab-generic, slub, kmemleak, debug, pagecache, msync, gup, memremap, memcg, pagemap, mremap, dma, sparsemem, vmalloc, documentation, kasan, initialization, pagealloc, and memory-failure)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (175 commits) mm/memory-failure: unnecessary amount of unmapping mm/mmzone.h: fix existing kernel-doc comments and link them to core-api mm: page_alloc: ignore init_on_free=1 for debug_pagealloc=1 net: page_pool: use alloc_pages_bulk in refill code path net: page_pool: refactor dma_map into own function page_pool_dma_map SUNRPC: refresh rq_pages using a bulk page allocator SUNRPC: set rq_page_end differently mm/page_alloc: inline __rmqueue_pcplist mm/page_alloc: optimize code layout for __alloc_pages_bulk mm/page_alloc: add an array-based interface to the bulk page allocator mm/page_alloc: add a bulk page allocator mm/page_alloc: rename alloced to allocated mm/page_alloc: duplicate include linux/vmalloc.h mm, page_alloc: avoid page_to_pfn() in move_freepages() mm/Kconfig: remove default DISCONTIGMEM_MANUAL mm: page_alloc: dump migrate-failed pages mm/mempolicy: fix mpol_misplaced kernel-doc mm/mempolicy: rewrite alloc_pages_vma documentation mm/mempolicy: rewrite alloc_pages documentation mm/mempolicy: rename alloc_pages_current to alloc_pages ...
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug9
-rw-r--r--lib/test_kasan.c59
-rw-r--r--lib/test_vmalloc.c128
3 files changed, 79 insertions, 117 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b38bbb5bb00e..678c13967580 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2573,11 +2573,18 @@ config TEST_FPU
endif # RUNTIME_TESTING_MENU
+config ARCH_USE_MEMTEST
+ bool
+ help
+ An architecture should select this when it uses early_memtest()
+ during boot process.
+
config MEMTEST
bool "Memtest"
+ depends on ARCH_USE_MEMTEST
help
This option adds a kernel parameter 'memtest', which allows memtest
- to be set.
+ to be set and executed.
memtest=0, mean disabled; -- default
memtest=1, mean do 1 test pattern;
...
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 785e724ce0d8..dc05cfc2d12f 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -54,6 +54,10 @@ static int kasan_test_init(struct kunit *test)
multishot = kasan_save_enable_multi_shot();
kasan_set_tagging_report_once(false);
+ fail_data.report_found = false;
+ fail_data.report_expected = false;
+ kunit_add_named_resource(test, NULL, NULL, &resource,
+ "kasan_data", &fail_data);
return 0;
}
@@ -61,6 +65,7 @@ static void kasan_test_exit(struct kunit *test)
{
kasan_set_tagging_report_once(true);
kasan_restore_multi_shot(multishot);
+ KUNIT_EXPECT_FALSE(test, fail_data.report_found);
}
/**
@@ -78,33 +83,31 @@ static void kasan_test_exit(struct kunit *test)
* fields, it can reorder or optimize away the accesses to those fields.
* Use READ/WRITE_ONCE() for the accesses and compiler barriers around the
* expression to prevent that.
+ *
+ * In between KUNIT_EXPECT_KASAN_FAIL checks, fail_data.report_found is kept as
+ * false. This allows detecting KASAN reports that happen outside of the checks
+ * by asserting !fail_data.report_found at the start of KUNIT_EXPECT_KASAN_FAIL
+ * and in kasan_test_exit.
*/
-#define KUNIT_EXPECT_KASAN_FAIL(test, expression) do { \
- if (IS_ENABLED(CONFIG_KASAN_HW_TAGS) && \
- !kasan_async_mode_enabled()) \
- migrate_disable(); \
- WRITE_ONCE(fail_data.report_expected, true); \
- WRITE_ONCE(fail_data.report_found, false); \
- kunit_add_named_resource(test, \
- NULL, \
- NULL, \
- &resource, \
- "kasan_data", &fail_data); \
- barrier(); \
- expression; \
- barrier(); \
- if (kasan_async_mode_enabled()) \
- kasan_force_async_fault(); \
- barrier(); \
- KUNIT_EXPECT_EQ(test, \
- READ_ONCE(fail_data.report_expected), \
- READ_ONCE(fail_data.report_found)); \
- if (IS_ENABLED(CONFIG_KASAN_HW_TAGS) && \
- !kasan_async_mode_enabled()) { \
- if (READ_ONCE(fail_data.report_found)) \
- kasan_enable_tagging_sync(); \
- migrate_enable(); \
- } \
+#define KUNIT_EXPECT_KASAN_FAIL(test, expression) do { \
+ if (IS_ENABLED(CONFIG_KASAN_HW_TAGS) && \
+ !kasan_async_mode_enabled()) \
+ migrate_disable(); \
+ KUNIT_EXPECT_FALSE(test, READ_ONCE(fail_data.report_found)); \
+ WRITE_ONCE(fail_data.report_expected, true); \
+ barrier(); \
+ expression; \
+ barrier(); \
+ KUNIT_EXPECT_EQ(test, \
+ READ_ONCE(fail_data.report_expected), \
+ READ_ONCE(fail_data.report_found)); \
+ if (IS_ENABLED(CONFIG_KASAN_HW_TAGS)) { \
+ if (READ_ONCE(fail_data.report_found)) \
+ kasan_enable_tagging_sync(); \
+ migrate_enable(); \
+ } \
+ WRITE_ONCE(fail_data.report_found, false); \
+ WRITE_ONCE(fail_data.report_expected, false); \
} while (0)
#define KASAN_TEST_NEEDS_CONFIG_ON(test, config) do { \
@@ -1049,14 +1052,14 @@ static void match_all_mem_tag(struct kunit *test)
continue;
/* Mark the first memory granule with the chosen memory tag. */
- kasan_poison(ptr, KASAN_GRANULE_SIZE, (u8)tag);
+ kasan_poison(ptr, KASAN_GRANULE_SIZE, (u8)tag, false);
/* This access must cause a KASAN report. */
KUNIT_EXPECT_KASAN_FAIL(test, *ptr = 0);
}
/* Recover the memory tag and free. */
- kasan_poison(ptr, KASAN_GRANULE_SIZE, get_tag(ptr));
+ kasan_poison(ptr, KASAN_GRANULE_SIZE, get_tag(ptr), false);
kfree(ptr);
}
diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index 5cf2fe9aab9e..01e9543de566 100644
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -23,8 +23,8 @@
module_param(name, type, 0444); \
MODULE_PARM_DESC(name, msg) \
-__param(bool, single_cpu_test, false,
- "Use single first online CPU to run tests");
+__param(int, nr_threads, 0,
+ "Number of workers to perform tests(min: 1 max: USHRT_MAX)");
__param(bool, sequential_test_order, false,
"Use sequential stress tests order");
@@ -47,19 +47,10 @@ __param(int, run_test_mask, INT_MAX,
"\t\tid: 128, name: pcpu_alloc_test\n"
"\t\tid: 256, name: kvfree_rcu_1_arg_vmalloc_test\n"
"\t\tid: 512, name: kvfree_rcu_2_arg_vmalloc_test\n"
- "\t\tid: 1024, name: kvfree_rcu_1_arg_slab_test\n"
- "\t\tid: 2048, name: kvfree_rcu_2_arg_slab_test\n"
/* Add a new test case description here. */
);
/*
- * Depends on single_cpu_test parameter. If it is true, then
- * use first online CPU to trigger a test on, otherwise go with
- * all online CPUs.
- */
-static cpumask_t cpus_run_test_mask = CPU_MASK_NONE;
-
-/*
* Read write semaphore for synchronization of setup
* phase that is done in main thread and workers.
*/
@@ -363,42 +354,6 @@ kvfree_rcu_2_arg_vmalloc_test(void)
return 0;
}
-static int
-kvfree_rcu_1_arg_slab_test(void)
-{
- struct test_kvfree_rcu *p;
- int i;
-
- for (i = 0; i < test_loop_count; i++) {
- p = kmalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return -1;
-
- p->array[0] = 'a';
- kvfree_rcu(p);
- }
-
- return 0;
-}
-
-static int
-kvfree_rcu_2_arg_slab_test(void)
-{
- struct test_kvfree_rcu *p;
- int i;
-
- for (i = 0; i < test_loop_count; i++) {
- p = kmalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return -1;
-
- p->array[0] = 'a';
- kvfree_rcu(p, rcu);
- }
-
- return 0;
-}
-
struct test_case_desc {
const char *test_name;
int (*test_func)(void);
@@ -415,8 +370,6 @@ static struct test_case_desc test_case_array[] = {
{ "pcpu_alloc_test", pcpu_alloc_test },
{ "kvfree_rcu_1_arg_vmalloc_test", kvfree_rcu_1_arg_vmalloc_test },
{ "kvfree_rcu_2_arg_vmalloc_test", kvfree_rcu_2_arg_vmalloc_test },
- { "kvfree_rcu_1_arg_slab_test", kvfree_rcu_1_arg_slab_test },
- { "kvfree_rcu_2_arg_slab_test", kvfree_rcu_2_arg_slab_test },
/* Add a new test case here. */
};
@@ -426,16 +379,13 @@ struct test_case_data {
u64 time;
};
-/* Split it to get rid of: WARNING: line over 80 characters */
-static struct test_case_data
- per_cpu_test_data[NR_CPUS][ARRAY_SIZE(test_case_array)];
-
static struct test_driver {
struct task_struct *task;
+ struct test_case_data data[ARRAY_SIZE(test_case_array)];
+
unsigned long start;
unsigned long stop;
- int cpu;
-} per_cpu_test_driver[NR_CPUS];
+} *tdriver;
static void shuffle_array(int *arr, int n)
{
@@ -463,9 +413,6 @@ static int test_func(void *private)
ktime_t kt;
u64 delta;
- if (set_cpus_allowed_ptr(current, cpumask_of(t->cpu)) < 0)
- pr_err("Failed to set affinity to %d CPU\n", t->cpu);
-
for (i = 0; i < ARRAY_SIZE(test_case_array); i++)
random_array[i] = i;
@@ -490,9 +437,9 @@ static int test_func(void *private)
kt = ktime_get();
for (j = 0; j < test_repeat_count; j++) {
if (!test_case_array[index].test_func())
- per_cpu_test_data[t->cpu][index].test_passed++;
+ t->data[index].test_passed++;
else
- per_cpu_test_data[t->cpu][index].test_failed++;
+ t->data[index].test_failed++;
}
/*
@@ -501,7 +448,7 @@ static int test_func(void *private)
delta = (u64) ktime_us_delta(ktime_get(), kt);
do_div(delta, (u32) test_repeat_count);
- per_cpu_test_data[t->cpu][index].time = delta;
+ t->data[index].time = delta;
}
t->stop = get_cycles();
@@ -517,53 +464,56 @@ static int test_func(void *private)
return 0;
}
-static void
+static int
init_test_configurtion(void)
{
/*
- * Reset all data of all CPUs.
+ * A maximum number of workers is defined as hard-coded
+ * value and set to USHRT_MAX. We add such gap just in
+ * case and for potential heavy stressing.
*/
- memset(per_cpu_test_data, 0, sizeof(per_cpu_test_data));
+ nr_threads = clamp(nr_threads, 1, (int) USHRT_MAX);
- if (single_cpu_test)
- cpumask_set_cpu(cpumask_first(cpu_online_mask),
- &cpus_run_test_mask);
- else
- cpumask_and(&cpus_run_test_mask, cpu_online_mask,
- cpu_online_mask);
+ /* Allocate the space for test instances. */
+ tdriver = kvcalloc(nr_threads, sizeof(*tdriver), GFP_KERNEL);
+ if (tdriver == NULL)
+ return -1;
if (test_repeat_count <= 0)
test_repeat_count = 1;
if (test_loop_count <= 0)
test_loop_count = 1;
+
+ return 0;
}
static void do_concurrent_test(void)
{
- int cpu, ret;
+ int i, ret;
/*
* Set some basic configurations plus sanity check.
*/
- init_test_configurtion();
+ ret = init_test_configurtion();
+ if (ret < 0)
+ return;
/*
* Put on hold all workers.
*/
down_write(&prepare_for_test_rwsem);
- for_each_cpu(cpu, &cpus_run_test_mask) {
- struct test_driver *t = &per_cpu_test_driver[cpu];
+ for (i = 0; i < nr_threads; i++) {
+ struct test_driver *t = &tdriver[i];
- t->cpu = cpu;
- t->task = kthread_run(test_func, t, "vmalloc_test/%d", cpu);
+ t->task = kthread_run(test_func, t, "vmalloc_test/%d", i);
if (!IS_ERR(t->task))
/* Success. */
atomic_inc(&test_n_undone);
else
- pr_err("Failed to start kthread for %d CPU\n", cpu);
+ pr_err("Failed to start %d kthread\n", i);
}
/*
@@ -581,29 +531,31 @@ static void do_concurrent_test(void)
ret = wait_for_completion_timeout(&test_all_done_comp, HZ);
} while (!ret);
- for_each_cpu(cpu, &cpus_run_test_mask) {
- struct test_driver *t = &per_cpu_test_driver[cpu];
- int i;
+ for (i = 0; i < nr_threads; i++) {
+ struct test_driver *t = &tdriver[i];
+ int j;
if (!IS_ERR(t->task))
kthread_stop(t->task);
- for (i = 0; i < ARRAY_SIZE(test_case_array); i++) {
- if (!((run_test_mask & (1 << i)) >> i))
+ for (j = 0; j < ARRAY_SIZE(test_case_array); j++) {
+ if (!((run_test_mask & (1 << j)) >> j))
continue;
pr_info(
"Summary: %s passed: %d failed: %d repeat: %d loops: %d avg: %llu usec\n",
- test_case_array[i].test_name,
- per_cpu_test_data[cpu][i].test_passed,
- per_cpu_test_data[cpu][i].test_failed,
+ test_case_array[j].test_name,
+ t->data[j].test_passed,
+ t->data[j].test_failed,
test_repeat_count, test_loop_count,
- per_cpu_test_data[cpu][i].time);
+ t->data[j].time);
}
- pr_info("All test took CPU%d=%lu cycles\n",
- cpu, t->stop - t->start);
+ pr_info("All test took worker%d=%lu cycles\n",
+ i, t->stop - t->start);
}
+
+ kvfree(tdriver);
}
static int vmalloc_test_init(void)