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 352A918A92D; Fri, 28 Mar 2025 21:47:50 +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=1743198471; cv=none; b=PGHZItjchFHlfICjcZY6v/RMMBZYt/+TQ5SyGM8qnbT+lHsY4Z9FQkGPlHIZUn6FPqbVdNKLZqbwSFLBnkqOECL8GiMmiXGuBNN+qnYVofdqgcPSR2Tkvl7idjcndiPe65cj0r1Pe3f4wQRacaw6wruTCrh8b1MR30naCuX4PZ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743198471; c=relaxed/simple; bh=xPBOsFaDqAzdeekjrQqYOX4avtGoqfLZWowK1nkfdfc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JOC6P2wVMOANeGwRvvab07NU1XX4TCPdMXbIozuoakMt+mQRGSIEC8Ea0J8U87+nqi6SlJGwLYlgN/JQMOpfyaLXcOS2qSYXGD3MRd6ptsv0pBF+TiiGVI5qA9KWaf/WN6pBq0ZH+hHNx7ZydwY+GivMpe3yjIoyBuhyNkIGiwE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ozq9w1e7; 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="Ozq9w1e7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4CC98C4CEE4; Fri, 28 Mar 2025 21:47:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743198470; bh=xPBOsFaDqAzdeekjrQqYOX4avtGoqfLZWowK1nkfdfc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Ozq9w1e7RAneqNHVfj4TYH28AgLtjM3+iDINbPIILwksUJL0S0epejOt+kvD76Yqe xGmUhvIxw/UyVprJbDqKMrT4nVvelVPjCXcZFofnUQMynKsaRKuwTEAt9kscdLX82H ctdV/SxNhRsjYb6eALMabI30llnsIUDgtxfunoxSQNxTO+fiiNZxXo1vc6Y8CPsIxv mjBJ6QgMY+eDgLZJyQlcKVLJAesHyeRqLFfhK6lDaW3TXwkr/ufNZiciGAa0wsecNQ b7jFrafL9JMYM1COe8yZSHwzR9yU50yU1sV0x8KS44kvEQTlghC8DIiMdA/8dm6pX+ XXHvB4kc5unKQ== Date: Fri, 28 Mar 2025 22:47:46 +0100 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: linux-tip-commits@vger.kernel.org, Ondrej Lichtner , "Herton R. Krzesinski" , x86@kernel.org Subject: Re: [tip: x86/mm] x86/uaccess: Improve performance by aligning writes to 8 bytes in copy_user_generic(), on non-FSRM/ERMS CPUs Message-ID: References: <20250320142213.2623518-1-herton@redhat.com> <174319666347.14745.18304475049279156644.tip-bot2@tip-bot2> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <174319666347.14745.18304475049279156644.tip-bot2@tip-bot2> * tip-bot2 for Herton R. Krzesinski wrote: > The following commit has been merged into the x86/mm branch of tip: > > Commit-ID: 411d2763b3ba0e3a99cd27ce813738d530b2320d > Gitweb: https://git.kernel.org/tip/411d2763b3ba0e3a99cd27ce813738d530b2320d > Author: Herton R. Krzesinski > AuthorDate: Thu, 20 Mar 2025 11:22:13 -03:00 > Committer: Ingo Molnar > CommitterDate: Fri, 28 Mar 2025 21:56:49 +01:00 > > x86/uaccess: Improve performance by aligning writes to 8 bytes in copy_user_generic(), on non-FSRM/ERMS CPUs > > History of the performance regression: > ====================================== > > Since the a series of user copy updates were merged upstream ^^^^^ > ~2 years ago via: That was my mistake in a last-minute edit to the changelog. I force-pushed a fix: | Since the following series of user copy updates were merged upstream | ~2 years ago via: Thanks, Ingo