On 4/4/19 1:56 AM, Peter Zijlstra wrote:
> On Wed, Apr 03, 2019 at 11:34:12AM -0600, Khalid Aziz wrote:
>> From: Julian Stecklina
>>
>> Only the xpfo_kunmap call that needs to actually unmap the page
>> needs to be serialized. We need to be careful to handle the case,
>> where after the atomic
On Wed, Apr 03, 2019 at 11:34:12AM -0600, Khalid Aziz wrote:
> From: Julian Stecklina
>
> Only the xpfo_kunmap call that needs to actually unmap the page
> needs to be serialized. We need to be careful to handle the case,
> where after the atomic decrement of the mapcount, a xpfo_kmap
>
From: Julian Stecklina
Only the xpfo_kunmap call that needs to actually unmap the page
needs to be serialized. We need to be careful to handle the case,
where after the atomic decrement of the mapcount, a xpfo_kmap
increased the mapcount again. In this case, we can safely skip
modifying the page
