Re: [PATCH v4 0/2] x86_64,entry: Clear NT on entry and speed up switch_to

[Andy Lutomirski]

On Mon, Oct 6, 2014 at 9:41 AM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> On 10/06/2014 09:39 AM, Andy Lutomirski wrote:
>> On Wed, Oct 1, 2014 at 11:49 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> 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.

--Andy
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