Re: [PATCH 1/1] hugetlb: fix CONFIG_PADATA dependency for non-SMP system

[Gang Li]

On 2024/2/5 15:37, Muchun Song wrote:
> Actually, I did not get it. Why the above code cannot work? The above
> code already make it serialized in one call, right? What do I miss here?
>
> Thanks.

PADATA consists of two distinct functionality:

One part is `padata_do_multithreaded`, which disregards
order and simply divides tasks into several groups for parallel
execution. My patch use `padata_do_multithreaded`.

The other part is composed of a set of APIs that, while handling data in
an out-of-order parallel manner, can eventually return the data with
ordered sequence. Only `crypto/pcrypt.c` use them. I guess these APIs
are designed specifically for `crypto/pcrypt.c`.
```
padata_alloc
padata_alloc_shell
padata_do_parallel
padata_do_serial
padata_free_shell
padata_free
```