This allows us to increase memory pressure dynamically using a new rcuperf boot command line parameter called 'rcumult'. Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> --- kernel/rcu/rcuperf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index da94b89cd5310..36f0ed75c7cf3 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -87,6 +87,7 @@ torture_param(bool, shutdown, RCUPERF_SHUTDOWN, torture_param(int, verbose, 1, "Enable verbose debugging printk()s"); torture_param(int, writer_holdoff, 0, "Holdoff (us) between GPs, zero to disable"); torture_param(int, kfree_rcu_test, 0, "Do we run a kfree_rcu() perf test?"); +torture_param(int, kfree_mult, 1, "Multiple of kfree_obj size to allocate."); static char *perf_type = "rcu"; module_param(perf_type, charp, 0444); @@ -627,7 +628,7 @@ kfree_perf_thread(void *arg) do { for (i = 0; i < kfree_alloc_num; i++) { - alloc_ptr = kmalloc(sizeof(struct kfree_obj), GFP_KERNEL); + alloc_ptr = kmalloc(kfree_mult * sizeof(struct kfree_obj), GFP_KERNEL); if (!alloc_ptr) return -ENOMEM; @@ -712,6 +713,8 @@ kfree_perf_init(void) schedule_timeout_uninterruptible(1); } + pr_alert("kfree object size=%lu\n", kfree_mult * sizeof(struct kfree_obj)); + kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), GFP_KERNEL); if (kfree_reader_tasks == NULL) { -- 2.25.0.265.gbab2e86ba0-goog