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 4AF9114C5A9 for ; Tue, 20 Feb 2024 20:20:17 +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=1708460418; cv=none; b=J83++idH3/BsPGIfMPwZTT8SEInnugMOvynZS9r6EBt7JtM8ljlT1SzVOt6U3t72BEwgU+ZO1/geiVCoVXhsc9RYx0mQlApW6pXF80Vh1BFGe//Xr5VoYv3i3C6vSr3Ek3TcPtI0cFCZ3363vvtpCkBXJRnX1zXZWF1wHDjlE1Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708460418; c=relaxed/simple; bh=69cEg/xoszDCeEjaQJejQBxzQt5Oy+zhNWaZQdxJSJQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YScdl+n0aObX41LyytS5i0UJ5JAxDPmficbAdmZilkDdFDaJVUxKLbFCimTpp0+36AZdrt7HEEpJ/udfD/ae/JqeHYCkOy7XZk+Z9ZK8YBjS99yx/l71HUc1RRHHVu4V+EfdmcfXQWt8iIXUAKK0Y0S2vMfTc1qA16sRZp6BOG8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=aclnp/VG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="aclnp/VG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9683C433F1; Tue, 20 Feb 2024 20:20:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708460417; bh=69cEg/xoszDCeEjaQJejQBxzQt5Oy+zhNWaZQdxJSJQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aclnp/VGI9Ok8GkxWi6ZJ9RJCLhCVqGU+MN6mR909+Nx4T3DZHJ0uEkBmlZhppsIk kbTOH+eO9gNYNA2YguJM1VGoWfY4578R0k27ucKhj+SQE4WC5dVpoGkifgN6T6hTog f+2zyxdbSTCp9bz9IzB/nkpScDjIKVr2sTQr4HG0= Date: Tue, 20 Feb 2024 21:20:14 +0100 From: Greg KH To: Suren Baghdasaryan Cc: stable@vger.kernel.org, Wang Kefeng , Russell King Subject: Re: [PATCH 1/2] ARM: 9328/1: mm: try VMA lock-based page fault handling first Message-ID: <2024022058-huskiness-previous-c334@gregkh> References: <2024021921-bleak-sputter-5ecf@gregkh> <20240220190351.39815-1-surenb@google.com> Precedence: bulk X-Mailing-List: stable@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: <20240220190351.39815-1-surenb@google.com> On Tue, Feb 20, 2024 at 11:03:50AM -0800, Suren Baghdasaryan wrote: > From: Wang Kefeng > > Attempt VMA lock-based page fault handling first, and fall back to the > existing mmap_lock-based handling if that fails, the ebizzy benchmark > shows 25% improvement on qemu with 2 cpus. > > Signed-off-by: Kefeng Wang > Signed-off-by: Russell King (Oracle) > Signed-off-by: Suren Baghdasaryan > --- > arch/arm/Kconfig | 1 + > arch/arm/mm/fault.c | 30 ++++++++++++++++++++++++++++++ > 2 files changed, 31 insertions(+) No git id? What kernel branch(s) does this go to? confused, greg k-h