Subject: Re: [PATCH bpf 4/4] bpf: use __vmalloc_node_range() with VM_TRY_HUGE_VMAP for bpf_prog_pack

From: Thomas Gleixner <[email-masked]>
Date: Thu, 31 Mar 2022 02:00:08 +0200

On Wed, Mar 30 2022 at 15:56, Song Liu wrote:
> We cannot yet savely enable HAVE_ARCH_HUGE_VMAP for all vmalloc in X86_64.
> Let bpf_prog_pack to call __vmalloc_node_range() with VM_TRY_HUGE_VMAP
> directly.

Again, this changelog lacks any form of reasoning and justification.

Aside of that there is absolutely nothing x86_64 specific in the patch.

You might know all the details behind this change today, but will you be
able to make sense of the above half a year from now?

Even if you can, then anyone else is left in the dark.

Thanks,

        tglx