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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260705-refcount-final-put-trace-v1-3-cdd0014626a9@mavick.dev> References: <20260705-refcount-final-put-trace-v1-0-cdd0014626a9@mavick.dev> In-Reply-To: <20260705-refcount-final-put-trace-v1-0-cdd0014626a9@mavick.dev> To: Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland , Gary Guo , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Andrew Morton , Dennis Zhou , Tejun Heo , Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, Eugene Mavick X-Developer-Signature: v=1; a=openpgp-sha256; l=1195; i=m@mavick.dev; h=from:subject:message-id; bh=/PtvR2dnazpQOJk7UFgwLIewlTHNG+dDvVdArf0En58=; b=owGbwMvMwCU2V/5U3e1aE3/G02pJDFmeU5lWFh5nbLEtyaku9NspuYY/XsDL2NNow+y1V7ec9 DrzwjOro5SFQYyLQVZMkaUmK8E9Y+WsROOjk3pg5rAygQxh4OIUgIn0L2H477xezNv04g6u40f2 lCbH/+CcH5MerNTyTCQ1O351Krv0VoZ/2kLZM/VNEoJ/LDFl4Ig4cjLFZBrDE7H5t23u+r2yn87 FDAA= X-Developer-Key: i=m@mavick.dev; a=openpgp; fpr=7C6A604768A99A6133C5928C9D1FCA7EDB7D344F X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: A3743160005 X-Stat-Signature: wmnt3dnazpcop53zz39bdjmmw4x8j9m3 X-HE-Tag: 1783320450-285509 X-HE-Meta: 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 8xKuXcAa ICKoaectC1f7yWnFoGR223jHzXhHLF7xdJbxLLvtvioNRW3/2yMFubJKRhS0hUc6JVytV662ae3QyEM8Jl2vFfxzzaqL1Vv0nNe9xmv+A4UZXtdDAkyatte2aE7ERiqPTZzpY32hN4VBX5PP3JEIv4b1XTvCE/8oxFVOs36oJXbH6hMtLqXVMzEUH2cg7JekIzXx2ofidRPd6A8/q61Idg1WcXob/GsldMck2/yt/oyabIJ8= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add the ref_trace_final_put tracepoint to percpu_ref_put_many(). The tracepoint fires when the atomic counter reaches zero in the atomic fallback path (after percpu_ref_kill() has been called). Signed-off-by: Eugene Mavick --- include/linux/percpu-refcount.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index d73a1c08c3e3..55543ecdf60c 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -55,6 +55,7 @@ #include #include #include +#include struct percpu_ref; typedef void (percpu_ref_func_t)(struct percpu_ref *); @@ -331,8 +332,10 @@ static inline void percpu_ref_put_many(struct percpu_ref *ref, unsigned long nr) if (__ref_is_percpu(ref, &percpu_count)) this_cpu_sub(*percpu_count, nr); - else if (unlikely(atomic_long_sub_and_test(nr, &ref->data->count))) + else if (unlikely(atomic_long_sub_and_test(nr, &ref->data->count))) { + trace_ref_final_put(ref); ref->data->release(ref); + } rcu_read_unlock(); } -- 2.51.2