From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f197.google.com (mail-qk0-f197.google.com [209.85.220.197]) by kanga.kvack.org (Postfix) with ESMTP id 7D4DC6B029C for ; Mon, 26 Sep 2016 00:26:42 -0400 (EDT) Received: by mail-qk0-f197.google.com with SMTP id f187so171958030qkd.3 for ; Sun, 25 Sep 2016 21:26:42 -0700 (PDT) Received: from mail-qt0-x244.google.com (mail-qt0-x244.google.com. [2607:f8b0:400d:c0d::244]) by mx.google.com with ESMTPS id u5si13356727qkb.5.2016.09.25.21.26.41 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 25 Sep 2016 21:26:41 -0700 (PDT) Received: by mail-qt0-x244.google.com with SMTP id 38so5463161qte.2 for ; Sun, 25 Sep 2016 21:26:41 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <1474570415-14938-1-git-send-email-mawilcox@linuxonhyperv.com> <1474570415-14938-3-git-send-email-mawilcox@linuxonhyperv.com> <20160924210443.GA106728@black.fi.intel.com> From: Ross Zwisler Date: Sun, 25 Sep 2016 22:26:40 -0600 Message-ID: Subject: Re: [PATCH 2/2] radix-tree: Fix optimisation problem Content-Type: multipart/alternative; boundary=94eb2c19078ae62b7b053d618856 Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: "Kirill A. Shutemov" , Matthew Wilcox , Matthew Wilcox , Andrew Morton , Konstantin Khlebnikov , Ross Zwisler , Linux Kernel Mailing List , linux-mm , linux-fsdevel --94eb2c19078ae62b7b053d618856 Content-Type: text/plain; charset=UTF-8 On Saturday, September 24, 2016, Linus Torvalds < torvalds@linux-foundation.org> wrote: > On Sat, Sep 24, 2016 at 2:04 PM, Kirill A. Shutemov > > wrote: > > > > Well, my ext4-with-huge-pages patchset[1] uses multi-order entries. > > It also converts shmem-with-huge-pages and hugetlb to them. > > Ok, so that code actually has a chance of being used. I guess we'll > not remove it. But I *would* like this subtle issue to have a comment > around that odd cast/and/mask thing. > > Linus > My DAX PMD patches will use multi-order entries as well. --94eb2c19078ae62b7b053d618856 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Saturday, September 24, 2016, Linus Torvalds <torvalds@linux-foundation.org> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex">On Sat, Sep 24, 2016 at 2:04 PM, Kirill A. Sh= utemov
<kirill.shutemov@linux.intel.com> = wrote:
>
> Well, my ext4-with-huge-pages patchset[1] uses multi-order entries. > It also converts shmem-with-huge-pages and hugetlb to them.

Ok, so that code actually has a chance of being used. I guess we'll
not remove it. But I *would* like this subtle issue to have a comment
around that odd cast/and/mask thing.

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Linus

My DAX PMD patches will use multi-order en= tries as well.=C2=A0
--94eb2c19078ae62b7b053d618856-- -- 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