From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lj1-f173.google.com (mail-lj1-f173.google.com [209.85.208.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7012E1D5CCD; Tue, 19 Nov 2024 22:22:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732054970; cv=none; b=KeFNgGy6lkdryytLkdSdNQ0TL3mW7BbNHVpqMC+xmgsvC3i/mkI9F/Egt7krCJeRactNBwbW2lQfuIF+2honddLm1I05rVV8jtazaMt0vSQAx/WnDrcsd9SxCyjd66d44YjELdHT/xG0ZJOMnKU8DJ7bWH2jJSxNjnVot+eOatA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732054970; c=relaxed/simple; bh=frmBqz2+kAXYjWld77XYtO0r7a4hA1sE5/CBNko3mGc=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=FPOADoHYvc2JJZX0iQWcYr92w9U1ps4Y3NyxxH3eJ5q9mzmGkIexSzaVhXxFLlRvkhcvbgrWRR7w5xpaUj6/K/w26UUPHhb15Vg4wL9+db2KVEkYBIiRix07DWxUjpIrXLhJjm/xebQFb6gcOmlZvjnRzLoj4HQlX+NGCb4tqb0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=XhgnsdIF; arc=none smtp.client-ip=209.85.208.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XhgnsdIF" Received: by mail-lj1-f173.google.com with SMTP id 38308e7fff4ca-2fb587d0436so35237501fa.2; Tue, 19 Nov 2024 14:22:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1732054966; x=1732659766; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=0VCA447h72acIoFwOSqYQV/WfKXOkE6l+r6q6ohnojI=; b=XhgnsdIFWquQ5be9O2GFtLy8znRhzSMqzc+HYMqp1Wouy3vlmTxE1esnp9B1Ru6GAe 8se0QpGi6wQcLKnxsBKHQqY4thrhhoNNa9AmjI/gvhqw7RqKh/kfHoMtnDKxm5ZWhcrj TPFIG14e3Zev/ACnrX6TTALXsTcfJnYpK390C+LwxFQDW+rtROEswCyuXH5Q7QkhrVSR IDbhmqz/1DS6o5A6ldYcZyyGWSq6UZAGOYq+EBOB8NaKNNn5DLAKLLZJvarxTD4mP2qV bt05eYI2mpwGtyiHXuz8qkvv6eoKjQN+hn20thqt26IIDXfuI6fOhq1XiVEneT/a63P+ b10w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732054966; x=1732659766; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0VCA447h72acIoFwOSqYQV/WfKXOkE6l+r6q6ohnojI=; b=FlSdQUlj6xCqbUuQfO8gVLuhLCLMV4pMeCosriWsPSvI0P32g0nifGepTa9dIbuugR tL7wSain3JhUBti9T8j68Ur6F5EgHsz7sT0YnnQyh+kxtW4NHwTtt9hfxQRLkb7lhsuo ivSTKqOF1PU4P6XG14qPIl5+lk2xHuXYno9EC+Kggshbj7r18CAH961MYBw4/zWTLAPR 77inlnsVE7BYASmojR8aiQPBQGfKJvM1By0XgWoq/JPXTu7LGNnEotsDq801kvtNkJRs 2iFhgXsS3NZgIkynHfNPLQ4ZClQfC7ilroIpcxYbEX5PHNCn0/AQjakXEjRYegUwctaj O8Iw== X-Forwarded-Encrypted: i=1; AJvYcCVsdyu70A2tMj4fWN88tq7dP42IB/tW0thl/3W44vkVyY57a2soG/kc9E5gfoE+O+Cc2cHRxpm1b5jnFiWWsu8=@vger.kernel.org, AJvYcCXUBeyAfL/CaMCW1sCNefHibnJejj176ZXIIFxiqpaOFcwsHUN8Eg1WfTA9ub1emaAX1c1AnCNtURZma7dc@vger.kernel.org X-Gm-Message-State: AOJu0YwQa89uJUcPjb5NPz/yO+YKBAuK0ZgcZmrYmwn5qu/x8cmUemTL OcrAxyZZR4ORwSPSBHED7tLdVi/z0YjQef66ltjk2O/WXYOsBt/vhhQQqdq6r0DxyRi4+/DvZo/ Gy8i3LF9nyXzqO21t8c6bmML5Hl8= X-Google-Smtp-Source: AGHT+IEAE3vAwgH/geRhf2LTai5j2PQXBuUSll2Pv5/4wm3AM/D7Ler3jx2A2ezdGYR9DXAIhleyoCnSeNW/pIevwWo= X-Received: by 2002:a05:6512:b8e:b0:536:55a8:6f78 with SMTP id 2adb3069b0e04-53dc1333a78mr126709e87.17.1732054966392; Tue, 19 Nov 2024 14:22:46 -0800 (PST) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20241119205529.3871048-1-bjohannesmeyer@gmail.com> <2024111914-overuse-cider-7734@gregkh> In-Reply-To: <2024111914-overuse-cider-7734@gregkh> From: Brian Johannesmeyer Date: Tue, 19 Nov 2024 15:22:32 -0700 Message-ID: Subject: Re: [RFC v2 0/2] dmapool: Mitigate device-controllable mem. corruption To: Greg KH Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Raphael Isemann , Cristiano Giuffrida , Herbert Bos Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Nov 19, 2024 at 3:15=E2=80=AFPM Greg KH wrote: > I know I said it privately, but I'll say it here in public, very cool > finding, this is nice work! Thanks! I appreciate your earlier feedback as well. > You had mentioned that the size:68 numbers were going to be re-run, has > that happened and this really is that much of a boost to that size? Or > is this the original numbers? I re-ran the test, and the numbers are consistent across multiple runs. I=E2=80=99m also surprised by how significant the improvement is for = the 68-byte block size. Thanks, Brian Johannesmeyer