On 09/14/2016 04:48 PM, Dave Hansen wrote:
>> On 09/02/2016 10:39 PM, Dave Hansen wrote:
>>> On 09/02/2016 04:39 AM, Juerg Haefliger wrote:
>>> Does this
>>> just mean that kernel allocations usually have to pay the penalty to
>>> convert a page?
>>
>> Only pages that are allocated for userspace (g
> On 09/02/2016 10:39 PM, Dave Hansen wrote:
>> On 09/02/2016 04:39 AM, Juerg Haefliger wrote:
>> Does this
>> just mean that kernel allocations usually have to pay the penalty to
>> convert a page?
>
> Only pages that are allocated for userspace (gfp & GFP_HIGHUSER ==
> GFP_HIGHUSER) which were
Hi Dave,
On 09/14/2016 04:33 PM, Dave Hansen wrote:
> On 09/14/2016 12:19 AM, Juerg Haefliger wrote:
>> Allocating a page to userspace that was previously allocated to the
>> kernel requires an expensive TLB shootdown. To minimize this, we only
>> put non-kernel pages into the hot cache to favor t
On 09/14/2016 12:19 AM, Juerg Haefliger wrote:
> Allocating a page to userspace that was previously allocated to the
> kernel requires an expensive TLB shootdown. To minimize this, we only
> put non-kernel pages into the hot cache to favor their allocation.
Hi, I had some questions about this the
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