From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vk0-f70.google.com (mail-vk0-f70.google.com [209.85.213.70]) by kanga.kvack.org (Postfix) with ESMTP id F237C28089F for ; Wed, 8 Feb 2017 11:24:55 -0500 (EST) Received: by mail-vk0-f70.google.com with SMTP id 78so74312762vkj.2 for ; Wed, 08 Feb 2017 08:24:55 -0800 (PST) Received: from mail-ua0-x22c.google.com (mail-ua0-x22c.google.com. [2607:f8b0:400c:c08::22c]) by mx.google.com with ESMTPS id q9si2417221uab.248.2017.02.08.08.24.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 08 Feb 2017 08:24:54 -0800 (PST) Received: by mail-ua0-x22c.google.com with SMTP id 35so113121287uak.1 for ; Wed, 08 Feb 2017 08:24:54 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <1FEF704E-915D-4A2B-987A-593B8EABE961@gmail.com> References: <1FEF704E-915D-4A2B-987A-593B8EABE961@gmail.com> From: Andy Lutomirski Date: Wed, 8 Feb 2017 08:24:33 -0800 Message-ID: Subject: Re: PCID review? Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Nadav Amit Cc: Andy Lutomirski , Borislav Petkov , Kees Cook , Dave Hansen , "linux-mm@kvack.org" , "Paul E. McKenney" On Tue, Feb 7, 2017 at 11:37 AM, Nadav Amit wrote: > Just a small question: should try_to_unmap_flush() work with these changes? Ugh, I probably need to fix that up. Thanks! > >> On Feb 7, 2017, at 10:56 AM, Andy Lutomirski wrote: >> >> Quite a few people have expressed interest in enabling PCID on (x86) >> Linux. Here's the code: >> >> https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/log/?h=x86/pcid >> >> The main hold-up is that the code needs to be reviewed very carefully. >> It's quite subtle. In particular, "x86/mm: Try to preserve old TLB >> entries using PCID" ought to be looked at carefully to make sure the >> locking is right, but there are plenty of other ways this this could >> all break. >> >> Anyone want to take a look or maybe scare up some other reviewers? >> (Kees, you seemed *really* excited about getting this in.) >> >> --Andy >> >> -- >> To unsubscribe, send a message with 'unsubscribe linux-mm' in >> the body to majordomo@kvack.org. For more info on Linux MM, >> see: http://www.linux-mm.org/ . >> Don't email: email@kvack.org > -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org