Re: [PATCH v2 bpf 3/3] bpf: use vmalloc with VM_ALLOW_HUGE_VMAP for bpf_prog_pack

[Edgecombe, Rick P]

CC Mike, who has been working on a direct map fragmentation solution.
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On Tue, 2022-04-12 at 14:00 -0700, Song Liu wrote:
> Since I am still learning the vmalloc/module_alloc code, I think I am
> not really capable of commenting on the direction. From our use
> cases, we do see performance hit due to large number of BPF
> program fragmenting the page table. Kernel module, OTOH, is not
> too big an issue for us, as we usually build hot modules into the
> kernel. That being said, we are interested in making the huge page
> interface general for BPF program and kernel module. We can
> commit resources to this effort.

That sounds great. Please feel free to loop me in if you do.


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https://lore.kernel.org/lkml/20220127085608.306306-1-rppt@xxxxxxxxxx/