From: "H. Peter Anvin" <hpa@zytor.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>, X86 ML <x86@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Sebastian Lackner <sebastian@fds-team.de>,
Anish Bhatt <anish@chelsio.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Chuck Ebbert <cebbert.lkml@gmail.com>
Subject: Re: [PATCH v4 0/2] x86_64,entry: Clear NT on entry and speed up switch_to
Date: Mon, 06 Oct 2014 09:57:22 -0700 [thread overview]
Message-ID: <5432C9F2.2030503@zytor.com> (raw)
In-Reply-To: <CALCETrXp+EkMzrA2PobS2rBfNjrD+JnAEOp5bYPz_P4bsBqCjg@mail.gmail.com>
On 10/06/2014 09:45 AM, Andy Lutomirski wrote:
> On Mon, Oct 6, 2014 at 9:41 AM, H. Peter Anvin <hpa@zytor.com> wrote:
>> On 10/06/2014 09:39 AM, Andy Lutomirski wrote:
>>> On Wed, Oct 1, 2014 at 11:49 AM, Andy Lutomirski <luto@amacapital.net> wrote:
>>>> Anish Bhatt noticed that user programs can set RFLAGS.NT before
>>>> syscall or sysenter, and the kernel entry code doesn't filter out
>>>> NT. This causes kernel C code and, depending on thread flags, the
>>>> exit slow path to run with NT set.
>>>>
>>>
>>> Quick ping: now that the merge window is (sort of) open, what's
>>> happening with these patches?
>>>
>>> Thanks,
>>> Andy
>>>
>>
>> My preference would be to queue them up for 3.19 since they arrived late
>> in the 3.18 cycle.
>
> I see nothing wrong with deferring patch 2 for 3.19, but deferring
> patch 1, which is tagged for stable, for an entire release seems a bit
> silly to me.
>
Yes, that is probably going to get pushed later in this merge window;
that is usually how we deal with that sort of thing.
-hpa
next prev parent reply other threads:[~2014-10-06 16:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-01 18:49 [PATCH v4 0/2] x86_64,entry: Clear NT on entry and speed up switch_to Andy Lutomirski
2014-10-01 18:49 ` [PATCH v4 1/2] x86_64,entry: Filter RFLAGS.NT on entry from userspace Andy Lutomirski
2014-10-01 19:49 ` Andy Lutomirski
2014-10-02 15:36 ` H. Peter Anvin
2014-10-06 16:42 ` H. Peter Anvin
2014-10-06 18:07 ` [tip:x86/urgent] x86_64, entry: " tip-bot for Andy Lutomirski
2014-10-01 18:49 ` [PATCH v4 2/2] x86_64: Don't save flags on context switch Andy Lutomirski
2014-10-06 16:39 ` [PATCH v4 0/2] x86_64,entry: Clear NT on entry and speed up switch_to Andy Lutomirski
2014-10-06 16:41 ` H. Peter Anvin
2014-10-06 16:45 ` Andy Lutomirski
2014-10-06 16:57 ` H. Peter Anvin [this message]
2014-11-01 0:20 ` Rusty Russell
2014-11-01 1:00 ` Andy Lutomirski
2014-11-01 1:08 ` [PATCH] x86_64, entry: Fix out of bounds read on sysenter Andy Lutomirski
2014-11-01 2:28 ` Rusty Russell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5432C9F2.2030503@zytor.com \
--to=hpa@zytor.com \
--cc=anish@chelsio.com \
--cc=cebbert.lkml@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=mingo@redhat.com \
--cc=sebastian@fds-team.de \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).