netdev - [PATCH bpf-next 0/2] flexible size for bpf_prog

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Message-ID: <20220210064108.1095847-1-song@kernel.org>
Date:   Wed, 9 Feb 2022 22:41:06 -0800
From:   Song Liu <song@...nel.org>
To:     <linux-mm@...ck.org>, <bpf@...r.kernel.org>,
        <netdev@...r.kernel.org>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <kernel-team@...com>, <akpm@...ux-foundation.org>,
        <eric.dumazet@...il.com>, Song Liu <song@...nel.org>
Subject: [PATCH bpf-next 0/2] flexible size for bpf_prog_pack

There are two issues with bpf_prog_pack:

(1) On NUMA systems, bpf_prog_pack need to be bigger
    (PMD_SIZE * num_online_nodes) to use huge pages.
(2) If the system doesn't support huge pages (nohugevmalloc in cmdline),
    allocating PMD_SIZE for bpf_prog_pack is a waste.

Address these issues with flexible bpf_prog_pack_size().

Song Liu (2):
  vmalloc: expose vmap_allow_huge via get_vmap_allow_huge()
  bpf: flexible size for bpf_prog_pack

 include/linux/vmalloc.h |  1 +
 kernel/bpf/core.c       | 47 +++++++++++++++++++++++------------------
 mm/vmalloc.c            |  5 +++++
 3 files changed, 33 insertions(+), 20 deletions(-)

--
2.30.2