> On Mar 9, 2022, at 10:35 AM, Song Liu <song@xxxxxxxxxx> wrote:
>
> Using HPAGE_PMD_SIZE as the size for bpf_prog_pack is not ideal in some
> cases. Specifically, for NUMA systems, __vmalloc_node_range requires
> PMD_SIZE * num_online_nodes() to allocate huge pages. Also, if the system
> does not support huge pages (i.e., with cmdline option nohugevmalloc), it
> is better to use PAGE_SIZE packs.
>
> Add logic to select proper size for bpf_prog_pack. This solution is not
> ideal, as it makes assumption about the behavior of module_alloc and
> __vmalloc_node_range. However, it appears to be the easiest solution as
> it doesn't require changes in module_alloc and vmalloc code.
>
> Fixes: 57631054fae6 ("bpf: Introduce bpf_prog_pack allocator")
> Signed-off-by: Song Liu <song@xxxxxxxxxx>
sigh... this is tricky:
# CONFIG_MMU is not set
Will fix this in v5.
Song
