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[94.245.46.61]) by smtp.gmail.com with ESMTPSA id n2sm2127387lfu.274.2021.01.29.12.05.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Jan 2021 12:05:15 -0800 (PST) From: "Uladzislau Rezki (Sony)" To: LKML , RCU , "Paul E . McKenney" , Michael Ellerman Cc: Michal Hocko , Andrew Morton , Daniel Axtens , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Peter Zijlstra , Thomas Gleixner , "Theodore Y . Ts'o" , Sebastian Andrzej Siewior , Uladzislau Rezki , Oleksiy Avramchenko Subject: [PATCH 1/2] rcuscale: add kfree_rcu() single-argument scale test Date: Fri, 29 Jan 2021 21:05:04 +0100 Message-Id: <20210129200505.5273-1-urezki@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To stress and test a single argument of kfree_rcu() call, we should to have a special coverage for it. We used to have it in the test-suite related to vmalloc stressing. The reason is the rcuscale is a correct place for RCU related things. Signed-off-by: Uladzislau Rezki (Sony) --- kernel/rcu/rcuscale.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 06491d5530db..e17745a155f9 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -94,6 +94,7 @@ torture_param(bool, shutdown, RCUSCALE_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() scale test?"); +torture_param(int, kfree_rcu_test_single, 0, "Do we run a kfree_rcu() single-argument scale test?"); torture_param(int, kfree_mult, 1, "Multiple of kfree_obj size to allocate."); static char *scale_type = "rcu"; @@ -667,10 +668,14 @@ kfree_scale_thread(void *arg) for (i = 0; i < kfree_alloc_num; i++) { alloc_ptr = kmalloc(kfree_mult * sizeof(struct kfree_obj), GFP_KERNEL); + if (!alloc_ptr) return -ENOMEM; - kfree_rcu(alloc_ptr, rh); + if (kfree_rcu_test_single) + kfree_rcu(alloc_ptr); + else + kfree_rcu(alloc_ptr, rh); } cond_resched(); -- 2.20.1