On Sun, 31 Dec 2017, Mathieu Desnoyers wrote:
> > Granted, it's not obvious and ideally we convert those this_cpu_read/writes
> > to __this_cpu_read/writes() to get the immediate fail reported on the first
> > access.
>
> Indeed, if this function is expected to be called from non-preempt context,
- On Dec 30, 2017, at 5:02 PM, Thomas Gleixner t...@linutronix.de wrote:
> On Sat, 30 Dec 2017, Mathieu Desnoyers wrote:
>> - On Dec 30, 2017, at 2:58 PM, Thomas Gleixner t...@linutronix.de wrote:
>> > /*
>> > * Called on fork from arch_dup_mmap(). Just copy the current LDT state,
>> > *
On Sat, 30 Dec 2017, Thomas Gleixner wrote:
> On Sat, 30 Dec 2017, Mathieu Desnoyers wrote:
> The only asymetry is in the error path of write_ldt() which can leak a half
> allocated page table. But, that's a nasty one because if there is an
> existing LDT mapped, then the pagetable cannot be freed.
On Sat, 30 Dec 2017, Mathieu Desnoyers wrote:
> - On Dec 30, 2017, at 2:58 PM, Thomas Gleixner t...@linutronix.de wrote:
> > /*
> > * Called on fork from arch_dup_mmap(). Just copy the current LDT state,
> > * the new task is not running, so nothing can be installed.
> > */
> > int ldt_dup_c
- On Dec 30, 2017, at 2:58 PM, Thomas Gleixner t...@linutronix.de wrote:
> On Sat, 30 Dec 2017, Mathieu Desnoyers wrote:
>
>> Hi Thomas,
>>
>> Here is some feedback on the KPTI patchset. Sorry for not replying to the
>> patch, I was not CC'd on the original email, and don't have it in my inb
On Sat, 30 Dec 2017, Mathieu Desnoyers wrote:
> Hi Thomas,
>
> Here is some feedback on the KPTI patchset. Sorry for not replying to the
> patch, I was not CC'd on the original email, and don't have it in my inbox.
I can bounce you 196 versions if you want.
> I notice that fill_ldt() sets the d
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