On Thu, Mar 05, 2020 at 08:16:25PM -0500, Joel Fernandes (Google) wrote: > 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> Looks plausible to me at a very quick first glance. Uladzislau, thoughts? Thanx, Paul > --- > 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 a4a8d097d84d9..16dd1e6b7c09f 100644 > --- a/kernel/rcu/rcuperf.c > +++ b/kernel/rcu/rcuperf.c > @@ -88,6 +88,7 @@ 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); > @@ -635,7 +636,7 @@ kfree_perf_thread(void *arg) > } > > 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; > > @@ -722,6 +723,8 @@ 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 >