From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id A10BD6B0038 for ; Tue, 7 Feb 2017 14:37:52 -0500 (EST) Received: by mail-pg0-f69.google.com with SMTP id v184so162216113pgv.6 for ; Tue, 07 Feb 2017 11:37:52 -0800 (PST) Received: from mail-pf0-x241.google.com (mail-pf0-x241.google.com. [2607:f8b0:400e:c00::241]) by mx.google.com with ESMTPS id w28si4953303pge.203.2017.02.07.11.37.51 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 Feb 2017 11:37:51 -0800 (PST) Received: by mail-pf0-x241.google.com with SMTP id y143so9896057pfb.1 for ; Tue, 07 Feb 2017 11:37:51 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Subject: Re: PCID review? From: Nadav Amit In-Reply-To: Date: Tue, 7 Feb 2017 11:37:49 -0800 Content-Transfer-Encoding: 7bit Message-Id: <1FEF704E-915D-4A2B-987A-593B8EABE961@gmail.com> References: Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski Cc: Borislav Petkov , Kees Cook , Dave Hansen , "linux-mm@kvack.org" , "Paul E. McKenney" Just a small question: should try_to_unmap_flush() work with these changes? > 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 -- 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