| From: |
| Song Liu <song-AT-kernel.org> |
| To: |
| <linux-mm-AT-kvack.org>, <linux-kernel-AT-vger.kernel.org> |
| Subject: |
| [RFC 0/5] vmalloc_exec for modules and BPF programs |
| Date: |
| Thu, 18 Aug 2022 15:42:13 -0700 |
| Message-ID: |
| <20220818224218.2399791-1-song@kernel.org> |
| Cc: |
| <akpm-AT-linux-foundation.org>, <x86-AT-kernel.org>, <peterz-AT-infradead.org>, <hch-AT-lst.de>, <kernel-team-AT-fb.com>, <rick.p.edgecombe-AT-intel.com>, <mcgrof-AT-kernel.org>, <dave.hansen-AT-intel.com>, Song Liu <song-AT-kernel.org> |
| Archive-link: |
| Article |
This set is a prototype that allows dynamic kernel text (modules, bpf
programs, various trampolines, etc.) to share huge pages. The idea is
similar to Peter's suggestion in [1]. Please refer to each patch for
more detais.
The ultimate goal is to only host kernel text in 2MB pages (for x86_64).
Please share your comments on this.
Thanks!
[1] https://lore.kernel.org/bpf/Ys6cWUMHO8XwyYgr@hirez.progra...
Song Liu (5):
vmalloc: introduce vmalloc_exec and vfree_exec
bpf: use vmalloc_exec
modules, x86: use vmalloc_exec for module core
vmalloc_exec: share a huge page with kernel text
vmalloc: vfree_exec: free unused vm_struct
arch/x86/Kconfig | 1 +
arch/x86/kernel/alternative.c | 30 ++++-
arch/x86/kernel/module.c | 1 +
arch/x86/mm/init_64.c | 3 +-
include/linux/vmalloc.h | 16 +--
kernel/bpf/core.c | 155 ++------------------------
kernel/module/main.c | 23 ++--
kernel/module/strict_rwx.c | 3 -
kernel/trace/ftrace.c | 3 +-
mm/nommu.c | 7 ++
mm/vmalloc.c | 200 +++++++++++++++++++++++++++++-----
11 files changed, 239 insertions(+), 203 deletions(-)
--
2.30.2
