diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2020-12-07 21:23:36 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-03-08 14:18:46 -0800 |
| commit | 0d3dd2c8eadb7d4404b8788f552fb2b824fe2c7e (patch) | |
| tree | 8eb424bfe56fd93463302870c8443e9cdc7de7ed | |
| parent | 5bb1bb353cfe343fc3c84faf06f72ba309fde541 (diff) | |
rcutorture: Add crude tests for mem_dump_obj()
This commit adds a few crude tests for mem_dump_obj() to rcutorture
runs. Just to prevent bitrot, you understand!
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 39 | ||||
| -rw-r--r-- | mm/slab_common.c | 2 | ||||
| -rw-r--r-- | mm/util.c | 1 |
3 files changed, 42 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 99657ffa6688..8e93f2e5da79 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1861,6 +1861,45 @@ rcu_torture_stats(void *arg) torture_shutdown_absorb("rcu_torture_stats"); } while (!torture_must_stop()); torture_kthread_stopping("rcu_torture_stats"); + + { + struct rcu_head *rhp; + struct kmem_cache *kcp; + static int z; + + kcp = kmem_cache_create("rcuscale", 136, 8, SLAB_STORE_USER, NULL); + rhp = kmem_cache_alloc(kcp, GFP_KERNEL); + pr_alert("mem_dump_obj() slab test: rcu_torture_stats = %px, &rhp = %px, rhp = %px, &z = %px\n", stats_task, &rhp, rhp, &z); + pr_alert("mem_dump_obj(ZERO_SIZE_PTR):"); + mem_dump_obj(ZERO_SIZE_PTR); + pr_alert("mem_dump_obj(NULL):"); + mem_dump_obj(NULL); + pr_alert("mem_dump_obj(%px):", &rhp); + mem_dump_obj(&rhp); + pr_alert("mem_dump_obj(%px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(%px):", &rhp->func); + mem_dump_obj(&rhp->func); + pr_alert("mem_dump_obj(%px):", &z); + mem_dump_obj(&z); + kmem_cache_free(kcp, rhp); + kmem_cache_destroy(kcp); + rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); + pr_alert("mem_dump_obj() kmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(kmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(kmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + kfree(rhp); + rhp = vmalloc(4096); + pr_alert("mem_dump_obj() vmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(vmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(vmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + vfree(rhp); + } + return 0; } diff --git a/mm/slab_common.c b/mm/slab_common.c index cec95363e621..4c6107e39f9a 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -545,6 +545,7 @@ bool kmem_valid_obj(void *object) page = virt_to_head_page(object); return PageSlab(page); } +EXPORT_SYMBOL_GPL(kmem_valid_obj); /** * kmem_dump_obj - Print available slab provenance information @@ -601,6 +602,7 @@ void kmem_dump_obj(void *object) pr_info(" %pS\n", kp.kp_stack[i]); } } +EXPORT_SYMBOL_GPL(kmem_dump_obj); #endif #ifndef CONFIG_SLOB diff --git a/mm/util.c b/mm/util.c index 2d497fe0f17d..c37e24d5fa43 100644 --- a/mm/util.c +++ b/mm/util.c @@ -1014,4 +1014,5 @@ void mem_dump_obj(void *object) } pr_cont(" non-slab/vmalloc memory.\n"); } +EXPORT_SYMBOL_GPL(mem_dump_obj); #endif |