Re: [PATCH v6 0/6] mm/vmalloc: Speed up ioremap, vmalloc and vmap with contiguous memory

[Wen Jiang]

On Fri, 10 Jul 2026 at 07:08, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Thu,  9 Jul 2026 15:38:17 +0800 Wen Jiang <jiangwenxiaomi@xxxxxxxxx> wrote:
>
> > This patchset accelerates ioremap, vmalloc, and vmap when the memory
> > is physically fully or partially contiguous.
>
> Thanks, I added this to mm.git's mm-new branch for wider testing.
>
> AI review asked some questions, and some of them are new since the v5
> series:
>         https://sashiko.dev/#/patchset/20260709073823.6643-1-jiangwen6@xxxxxxxxxx

Hi Andrew,

I've gone through the Sashiko findings:

- Patch 1 (find_num_contig): Over-interpretation. No new hugetlbfs hstate
  is added. The extra sizes are only used by init_mm kernel mappings via.

- Patch 5/6 (NULL page): Invalid input. vmap() expects a fully populated
    array of valid struct page pointers.

- Patch 6 (32-bit count << PAGE_SHIFT overflow): Pre-existing. This was
    already discussed in the V3 thread, and a separate fix was proposed
    there.

Thanks,
Wen