* Andi Kleen | 2014-01-04 19:18:07 [+0100]:
>On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote:
>> where do I start. Let me explain what is going on here. The code
>> sequence
>
>Yes the IST stacks are needed for correctness, even in more cases than
>the example below. You
On Sun, Jan 05, 2014 at 05:45:47AM +0100, Mike Galbraith wrote:
> On Sat, 2014-01-04 at 19:18 +0100, Andi Kleen wrote:
> > On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote:
> > > where do I start. Let me explain what is going on here. The code
> > > sequence
> >
> > Yes t
On Sat, 2014-01-04 at 19:18 +0100, Andi Kleen wrote:
> On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote:
> > where do I start. Let me explain what is going on here. The code
> > sequence
>
> Yes the IST stacks are needed for correctness, even in more cases than
> the exam
On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote:
> where do I start. Let me explain what is going on here. The code
> sequence
Yes the IST stacks are needed for correctness, even in more cases than
the example below. You cannot just disable them, just because you don't
li
where do I start. Let me explain what is going on here. The code
sequence
| pushf
| pop%edx
| or $0x1,%dh
| push %edx
| mov$0xe0,%eax
| popf
| sysenter
triggers the bug. On 64bit kernel we see the double fault (with 32bit and
64bit userland) and on 32bit kernel there is no problem. T
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