# Re: Candidate Linux ABI for Intel AMX and hypothetical new related features

- From: Dave Hansen \<hidden\>
- Date: 2021-05-21 23:06:09 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/05/1388171
- Thread: https://ratatoskr.run/linux-api/2021/05/1387720/t.md

```text
On 5/21/21 3:07 PM, Len Brown wrote:
> My concern about synchronous allocation is that it will be very easy
> to abuse.  programs and threads can ask for buffers they will never
> use.  With on-demand allocation, we allocate buffers only if they are
> actually needed.

If someone wants to abuse the on-demand allocation, they will simply
write a single bit to an AMX register.  That does *NOT* mean they will
actually execute an instruction that actually uses AMX to do something
meaningful.

In the face of abuse, I think the two approaches are very similar.
```