Andrea Arcangeli wrote:
> On Wed, Aug 30, 2017 at 08:47:19PM -0400, Jerome Glisse wrote:
>> On Wed, Aug 30, 2017 at 04:25:54PM -0700, Nadav Amit wrote:
>>> For both CoW and KSM, the correctness is maintained by calling
>>> ptep_clear_flush_notify(). If you defer the secondary MMU invalidation
>>>
On Wed, Aug 30, 2017 at 08:47:19PM -0400, Jerome Glisse wrote:
> On Wed, Aug 30, 2017 at 04:25:54PM -0700, Nadav Amit wrote:
> > For both CoW and KSM, the correctness is maintained by calling
> > ptep_clear_flush_notify(). If you defer the secondary MMU invalidation
> > (i.e., replacing ptep_clear_
On Wed, Aug 30, 2017 at 04:25:54PM -0700, Nadav Amit wrote:
> [cc’ing IOMMU people, which for some reason are not cc’d]
>
> Andrea Arcangeli wrote:
>
> > On Wed, Aug 30, 2017 at 11:00:32AM -0700, Nadav Amit wrote:
> >> It is not trivial to flush TLBs (primary or secondary) without holding the
>
[cc’ing IOMMU people, which for some reason are not cc’d]
Andrea Arcangeli wrote:
> On Wed, Aug 30, 2017 at 11:00:32AM -0700, Nadav Amit wrote:
>> It is not trivial to flush TLBs (primary or secondary) without holding the
>> page-table lock, and as we recently encountered this resulted in severa
