Enabling HAVE_ARCH_HUGE_VMALLOC on x86_64 and use it for bpf_prog_pack has caused some issues [1], as many users of vmalloc are not yet ready to handle huge pages. To enable a more smooth transition to use huge page backed vmalloc memory, this set replaces VM_NO_HUGE_VMAP flag with an new opt-in flag, VM_ALLOW_HUGE_VMAP. More discussions about this topic can be found at [2]. Patch 1 removes VM_NO_HUGE_VMAP and adds VM_ALLOW_HUGE_VMAP. Patch 2 uses VM_ALLOW_HUGE_VMAP in bpf_prog_pack. [1] https://lore.kernel.org/lkml/20220204185742.271030-1-song@xxxxxxxxxx/ [2] https://lore.kernel.org/linux-mm/20220330225642.1163897-1-song@xxxxxxxxxx/ Song Liu (2): vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP bpf: use vmalloc with VM_ALLOW_HUGE_VMAP for bpf_prog_pack arch/Kconfig | 6 ++---- arch/powerpc/kernel/module.c | 2 +- arch/s390/kvm/pv.c | 2 +- include/linux/vmalloc.h | 3 +-- kernel/bpf/core.c | 24 ++++++++++++++++++++---- mm/vmalloc.c | 19 +------------------ 6 files changed, 26 insertions(+), 30 deletions(-) -- 2.30.2
