From mboxrd@z Thu Jan 1 00:00:00 1970 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 619B160EF9 for ; Mon, 15 Apr 2024 15:28:17 +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=1713194898; cv=none; b=hvKw4FSKHLzwxbqpjEfbBDO437c2X7Uvr8xFDmpj9JUiAbHdacA5YuXMlS4NMfokjIytM6T9ToB9ABuF1uLaQo6qfQrzz8DLtpgEVagFD2OIvOGGy4cy0MpjDQgBIT/uJoHdAEqusX5pJ4JJ6jGjSYTlyDf2lIm37Tz0na9Tpds= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713194898; c=relaxed/simple; bh=8F9ucDIw0mXDD0ZlZXTS1GEvdOSfw7kx0csGX6bWCNU=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=DcwCdC0VgDVzkxhfgSiSXQM8wEFei9RLrAcIGB6VNXToOyrlJ/V4DiyPhvrxD83/6UTWVmJwAUNsZQVLhEU3thJ1ffLCP+n5OxDsXPPgFkVivf6LugyYFbPNJHF05OCFTdCLmUWKW99On6p60ttqPE24xmKA4KcIemi3bfjcIvQ= 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=EmqXj4nA; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=FQ/mEvSW; 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="EmqXj4nA"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="FQ/mEvSW" From: Anna-Maria Behnsen DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1713194895; 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: in-reply-to:in-reply-to:references:references; bh=8F9ucDIw0mXDD0ZlZXTS1GEvdOSfw7kx0csGX6bWCNU=; b=EmqXj4nAPJDhXsEarHCiyRSkFRZXjKB27EtzZqqxoc6DJ6X5+WMtVcGTezw+41D3ZsOh3R SZFit7eJtkR69J/mXmJFFuWHPSkXqWSDiDwJz4N+80runJlIrucQXdM4hkYNakaRN8Lrg7 hqxsEkJqZmMOq23qcq90T21a0sP/hTe2O3PO3QU0aTJelhCeinGqgZuIiLUAzNTVAmQL5v b374Q7n8XBZ9NAlb3Y+o/NX7EzbXDwnJhToY8FWbgrrlx+UQL6MUzI8V7TRekjgAjZLkSE g47nyxyrN4J5I0TzvOqEjK4rMDGImAoQ15hyFveSmJTwOPbosWtHnX4i2vDqmg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1713194895; 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: in-reply-to:in-reply-to:references:references; bh=8F9ucDIw0mXDD0ZlZXTS1GEvdOSfw7kx0csGX6bWCNU=; b=FQ/mEvSWEVJe22UIXtF8pX4dEjuI1FskVSsBFplYfOEjPYarAO8d3N/KNcz2MDsykqNHkQ jikbsKZhfF1hjCBA== To: Thomas Gleixner , LKML Cc: Frederic Weisbecker , John Stultz , Peter Zijlstra , Ingo Molnar , Stephen Boyd , Eric Biederman , Oleg Nesterov Subject: Re: [patch V2 16/50] posix-cpu-timers: Simplify posix_cpu_timer_set() In-Reply-To: <20240410165551.943625183@linutronix.de> References: <20240410164558.316665885@linutronix.de> <20240410165551.943625183@linutronix.de> Date: Mon, 15 Apr 2024 17:28:14 +0200 Message-ID: <877cgyve5t.fsf@somnus> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Thomas Gleixner writes: > Avoid the late sighand lock/unlock dance when a timer is not armed to > enforce reevaluation of the timer base so that the process wide CPU timer > sampling can be disabled. > > Do it right at the point where the arming decision is made which already > has sighand locked. > Reviewed-by: Anna-Maria Behnsen