From nobody Sun Feb 8 20:29:02 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 7F0713358A0; Wed, 29 Oct 2025 13:22:21 +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=1761744143; cv=none; b=lED8w5wx74DdLZ+3qvLhoPbUYgnCiJvFh5ZPGbyY+CSD6X+L9rvyOYsXky23O8UeEmc1UGP38oeik3HtSg2xLAPI/Wm+RjK2FKl9w94EAuEB//Stv+Wz7S9KQ5ln7aqDBa/pOhlfkRBuw1gB1b0tPFcud1cCGKuAvKAr9Q2YPSY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761744143; c=relaxed/simple; bh=NqQjpQ6wmtHhaimTEy5dZdITuRSnH9EVOsOJjL3t7HI=; h=Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type:Date; b=nMQQov1DHt7nXbOC7PgvHYjf8tlt96RWbVCgBAkXBanbSC2tBCXos/fQ3DtW8a71AnHzjWdRqerCCZQfuWJWPzyaHg+sZpmsZWUDZzH9JrdWecIk6l6w61sa0wnOWkFkTatDYF/WoBJ+B9pGgB19JTDpgwIhEyJSfz8TSaUISCw= 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=3o9KWlMa; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=1tPPufxy; 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="3o9KWlMa"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="1tPPufxy" Message-ID: <20251029130403.670613644@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1761744139; 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=3o9KWlMacyWGdE6xcjYeRmWr4iCgJrT9Nfst+K1x3hQauuPiq7p+PO44QRsbsfxIgKSIsz aiuNkT+lDJwnR3rwrkgCm+J3UGf8pxG8u5guiTS41oVvAybLlbzuvwidBVcn7Q3DFcwK3p SDmvJuWm+frk7yuFjrNj5xHsNjuTJ3+rSBFxVUcoFbxuqwB3QArc0TAGWL1F3UIZ8Jdle+ Fsz1B0MNCg+3uOKY5CIM60SWvhWxgqGDaqBJ6GvMKthNlRkjv+PWrco7sSMUstii+5tDVI 6CaYaWymeTILy7vPsXUj1zZDM+eeBue1SGO1V/Z0hKnZCqZ6M9Fn8I2XwrwUbQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1761744139; 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=1tPPufxy9X3/lvoMH+XM08CDT5zopDkI3DWO9mQGbYHwcZTHPRjRhpl6pR3PU9W9lW7sv1 zFVDDUb2CB3j25Bw== From: Thomas Gleixner To: LKML Cc: 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 Subject: [patch V3 04/12] rseq: Add statistics for time slice extensions References: <20251029125514.496134233@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Wed, 29 Oct 2025 14:22:18 +0100 (CET) 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 Reviewed-by: Mathieu Desnoyers --- 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; }