From nobody Mon Feb 9 00:53:42 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6BE3834BA35; Wed, 22 Oct 2025 12:57:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761137857; cv=none; b=QaSX9m/AJg3vHR6b0nv5DCqZJ0bAr6npkEfO0ot0eDWa5QuT43yI9S6HFe0A28WM/n+73/HZLtRoNxpz6bSVc9exuYGiqTeX1HduuDMZjq8YvUJQ2ujDHXoDFO454n0N8d8Tt9Cy2WiG8FOdfkDo5dnC8fkYN4JVIux8LWN/l6I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761137857; c=relaxed/simple; bh=NqQjpQ6wmtHhaimTEy5dZdITuRSnH9EVOsOJjL3t7HI=; h=Message-ID:From:To:Subject:References:MIME-Version:Content-Type: cc:Date; b=HZlkgeIQavnMKHzmDkpOHTMbKqrpzN5Bbysn/dU9s6MPAHv8qhwAjZuRqBQdqNMh2hIdoiq/4r4QAWsGaCanQjVeKqVdqjSWyPMsRksbaxN21J/mUAlRYNDffg+Y8ONEeyLguDvuegJ34cO2xGd7v05WyO/lEMEs3j652FIUOBQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=RGH1FT4g; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=rNt3GGSb; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="RGH1FT4g"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="rNt3GGSb" Message-ID: <20251022121427.154468974@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1761137853; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=puOLVz/xusJgMHcGpgny0+0j3GVseKRPTpDHpqHQHdc=; b=RGH1FT4gMeYfcV+qgskWSrAx0ekg8en92o5+thKaMsHWFEHUUYg2uau7GiFbu5fdYW2Q2D jHd+9F/akKTUdRRQgK4rmlUBrlin9bSToDHB5jmFpSDzZE0/oVdlKw/DhoCQ0BOT9NFk5K IaajdBwgUH0GwrtA32mnhxa/rdYamZxTYWvIwDf/1lTowO2iHHSeSazNg7WNcbMqv4B7kH sk8ZjF7drGMWWK8uhUx4kwM1bf7Tan6FjrFPw7q8qXkSp3wvXWTkW3vAzmVMtb2dJtRiZN hGhvLQSbbbGGOf7MrkLltlCL0G6OpmiE9kCAwcSLkxEcmfQzquTasQxo1soUfA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1761137853; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=puOLVz/xusJgMHcGpgny0+0j3GVseKRPTpDHpqHQHdc=; b=rNt3GGSbnKp11eWPfxghzbPdfC55gtgzrUBLCkAAxqsZAD7urOHAifdptXz8PMOv+0UE5F PgLoVo8yl+qsH3Ag== From: Thomas Gleixner To: LKML Subject: [patch V2 04/12] rseq: Add statistics for time slice extensions References: <20251022110646.839870156@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 cc: Peter Zilstra , Peter Zijlstra , Mathieu Desnoyers , "Paul E. McKenney" , Boqun Feng , Jonathan Corbet , Prakash Sangappa , Madadi Vineeth Reddy , K Prateek Nayak , Steven Rostedt , Sebastian Andrzej Siewior , Arnd Bergmann , linux-arch@vger.kernel.org Date: Wed, 22 Oct 2025 14:57:33 +0200 (CEST) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend the quick statistics with time slice specific fields. Signed-off-by: Thomas Gleixner --- include/linux/rseq_entry.h | 4 ++++ kernel/rseq.c | 12 ++++++++++++ 2 files changed, 16 insertions(+) --- a/include/linux/rseq_entry.h +++ b/include/linux/rseq_entry.h @@ -15,6 +15,10 @@ struct rseq_stats { unsigned long cs; unsigned long clear; unsigned long fixup; + unsigned long s_granted; + unsigned long s_expired; + unsigned long s_revoked; + unsigned long s_yielded; }; =20 DECLARE_PER_CPU(struct rseq_stats, rseq_stats); --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -138,6 +138,12 @@ static int rseq_stats_show(struct seq_fi stats.cs +=3D data_race(per_cpu(rseq_stats.cs, cpu)); stats.clear +=3D data_race(per_cpu(rseq_stats.clear, cpu)); stats.fixup +=3D data_race(per_cpu(rseq_stats.fixup, cpu)); + if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) { + stats.s_granted +=3D data_race(per_cpu(rseq_stats.s_granted, cpu)); + stats.s_expired +=3D data_race(per_cpu(rseq_stats.s_expired, cpu)); + stats.s_revoked +=3D data_race(per_cpu(rseq_stats.s_revoked, cpu)); + stats.s_yielded +=3D data_race(per_cpu(rseq_stats.s_yielded, cpu)); + } } =20 seq_printf(m, "exit: %16lu\n", stats.exit); @@ -148,6 +154,12 @@ static int rseq_stats_show(struct seq_fi seq_printf(m, "cs: %16lu\n", stats.cs); seq_printf(m, "clear: %16lu\n", stats.clear); seq_printf(m, "fixup: %16lu\n", stats.fixup); + if (IS_ENABLED(CONFIG_RSEQ_SLICE_EXTENSION)) { + seq_printf(m, "sgrant: %16lu\n", stats.s_granted); + seq_printf(m, "sexpir: %16lu\n", stats.s_expired); + seq_printf(m, "srevok: %16lu\n", stats.s_revoked); + seq_printf(m, "syield: %16lu\n", stats.s_yielded); + } return 0; }