From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 7CE5C74076; Sun, 25 Aug 2024 12:37:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724589468; cv=none; b=pwX+V0MkQNn45HJnFvKujqBULBhhXzDPofi64zV0httgmo+bHJPgbRhuRi/kqnoa5EPMwxkZ2SzOwNetk62sAxt0jakY6iq03Jz3v6J6HeoIFuczhv2f1NpaiVSL46FI7MkxFkFqg8/vUQbQ3BVYjrBq4vnx4l2Rc2y1ah9z4Lw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724589468; c=relaxed/simple; bh=ehb4C4WLmyUJs/6wpAK5MGPHln+w8i78S61mk5Dy0Qc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=HSQ1gFr4czor+t/4l9C+gGzCZ5ml/rlwjwdUZE/Nxm3SIsDcKhxrqc7CWkCM1QzmhQiaGbmdBcTeB0VgMBTprDEiS1+drvS63Q5GgIrFR5Cchbt6CxMBZFyW0cUqWFxWAXX8gbcGGeXgrCnZA5W47xOU57MG8ZkTbD/b6sJ6a7M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H8fL7pGB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="H8fL7pGB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D99F6C32782; Sun, 25 Aug 2024 12:37:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724589468; bh=ehb4C4WLmyUJs/6wpAK5MGPHln+w8i78S61mk5Dy0Qc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=H8fL7pGB4Tyv4QF/tTKBsOFJO25D/8OEzzgIqEP481LY/IToFchHlucyskmROfoht azAtUGdaEGxqVG7fNpBPhMJthdYxRD3jY+U7U9issHIAiNdiBY/6kY1YR38fHaLQtl sHpOe+hM5n8vFGhneIQMO/0bkrrosbsUj3uePba5Ro/Y2F8u6cOKJxHHPWCEk9HCPo uNaOcHheCXmOoabjKxxEWKxOSm8B0P5K4/W6/Wd7cZ+RLfmdGG5/6tTuidvcua82T+ M6AM4a5HD23Ezu0OAGpd6Vx9Cc34PpHRMrnPF7o2d2fE+2oVbl4btUqJ7/G+NOjTmE 34QkaOUgcBwDA== Message-ID: <979c3fc3-33d3-49fa-af80-52ec09325a08@kernel.org> Date: Sun, 25 Aug 2024 07:37:45 -0500 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] x86/tsc: Use rdtsc_ordered() when RDTSCP or LFENCE_RDTSC are supported To: Thomas Gleixner , Bjorn Helgaas , Mathias Nyman , Mika Westerberg Cc: "open list : PCI SUBSYSTEM" , open list , "open list : USB XHCI DRIVER" , Daniel Drake , Gary Li , Greg Kroah-Hartman , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Mario Limonciello References: <20240823042508.1057791-1-superm1@kernel.org> <20240823042508.1057791-3-superm1@kernel.org> <8734msg5ce.ffs@tglx> Content-Language: en-US From: Mario Limonciello In-Reply-To: <8734msg5ce.ffs@tglx> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 8/25/24 07:22, Thomas Gleixner wrote: > On Thu, Aug 22 2024 at 23:25, Mario Limonciello wrote: > > Why is this hidden in a reply to the middle of a PCI patch series? > > Sigh. As I mentioned in my reply I didn't mean for this to go out at this time. Sorry for the noise! It's still under testing that it REALLY helps things. It was in my working directory and I totally missed it when I sent this PCI series. > >> From: Mario Limonciello >> >> On AMD processors the TSC has been reported drifting on and off for >> various platforms. This has been root caused to becaused by out of order >> TSC and HPET counter values. When the SoC supports RDTSCP or LFENCE_RDTSC >> use ordered tsc reads instead. > > This really wants a fixes tag. Yes; assuming it really helps I will send it properly with tags and to the right lists.