Re: [PATCH v6 5/6] fuse: add zero-copy over io-uring

On Thu, Aug 13, 2026 at 1:42 PM Bernd Schubert <[email protected]> wrote:
>
>
> >> As far as I know kmalloc will allocate continuos pages and might fail
> >> under fragmentation if more than a page is needed. I'm not entirely sure
> >> if kvmalloc for such a small allocation will actually do the job.
> >> How about the attached patch? And with that maybe we should limit
> >> max_nr_pages to 256 for ZC?
> >
> > I think kvmalloc should be fine. For size > PAGE_SIZE it tries kmalloc
> > first and has a fallback to vmalloc. For small allocations, kvmalloc
> > is just plain kmalloc.
>
> I think the patch I had attached is more elegant, but we can do that any
> time later. I just found kvmalloc_flex, I guess that would be most suitable.
>

I'll change this to use kvmalloc_flex.

Thanks,
Joanne