+ Luis. > On Oct 7, 2022, at 4:43 PM, Song Liu <song@xxxxxxxxxx> wrote: > > Changes RFC v1 => RFC v2: > 1. Major rewrite of the logic of vmalloc_exec and vfree_exec. They now > work fine with BPF programs (patch 1, 2, 4). But module side (patch 3) > still need some work. > > 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@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > [2] RFC v1: https://lore.kernel.org/linux-mm/20220818224218.2399791-3-song@xxxxxxxxxx/T/ > > Song Liu (4): > 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 > > 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 | 2 + > 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 | 296 ++++++++++++++++++++++++++++++++++ > 11 files changed, 358 insertions(+), 166 deletions(-) > > -- > 2.30.2
