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Date:	Mon, 06 Oct 2014 09:41:16 -0700
From:	"H. Peter Anvin" <>
To:	Andy Lutomirski <>,
	Thomas Gleixner <>, X86 ML <>,
	Ingo Molnar <>
CC:	Sebastian Lackner <>,
	Anish Bhatt <>,
	"" <>,
	Chuck Ebbert <>
Subject: Re: [PATCH v4 0/2] x86_64,entry: Clear NT on entry and speed up switch_to

On 10/06/2014 09:39 AM, Andy Lutomirski wrote:
> On Wed, Oct 1, 2014 at 11:49 AM, Andy Lutomirski <> 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.


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