linux/lib/test_vmalloc.c

// SPDX-License-Identifier: GPL-2.0

/*
 * Test module for stress and analyze performance of vmalloc allocator.
 * (C) 2018 Uladzislau Rezki (Sony) <[email protected]>
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/random.h>
#include <linux/kthread.h>
#include <linux/moduleparam.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/rwsem.h>
#include <linux/mm.h>
#include <linux/rcupdate.h>
#include <linux/slab.h>

#define __param(type, name, init, msg) …				\

__param(…) …;

__param(…) …;

__param(…) …;

__param(…) …;

__param(…) …;

__param(…) …;

__param(…) …;

/*
 * Read write semaphore for synchronization of setup
 * phase that is done in main thread and workers.
 */
static DECLARE_RWSEM(prepare_for_test_rwsem);

/*
 * Completion tracking for worker threads.
 */
static DECLARE_COMPLETION(test_all_done_comp);
static atomic_t test_n_undone = …;

static inline void
test_report_one_done(void)
{ … }

static int random_size_align_alloc_test(void)
{ … }

/*
 * This test case is supposed to be failed.
 */
static int align_shift_alloc_test(void)
{ … }

static int fix_align_alloc_test(void)
{ … }

static int random_size_alloc_test(void)
{ … }

static int long_busy_list_alloc_test(void)
{ … }

static int full_fit_alloc_test(void)
{ … }

static int fix_size_alloc_test(void)
{ … }

static int
pcpu_alloc_test(void)
{ … }

struct test_kvfree_rcu { … };

static int
kvfree_rcu_1_arg_vmalloc_test(void)
{ … }

static int
kvfree_rcu_2_arg_vmalloc_test(void)
{ … }

static int
vm_map_ram_test(void)
{ … }

struct test_case_desc { … };

static struct test_case_desc test_case_array[] = …;

struct test_case_data { … };

static struct test_driver { … } *tdriver;

static void shuffle_array(int *arr, int n)
{ … }

static int test_func(void *private)
{ … }

static int
init_test_configuration(void)
{ … }

static void do_concurrent_test(void)
{ … }

static int vmalloc_test_init(void)
{ … }

module_init(vmalloc_test_init)

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;