Le 27/12/2021 à 15:59, Kefeng Wang a écrit :
> This patch select HAVE_ARCH_HUGE_VMALLOC to let X86_64 and X86_PAE
> support huge vmalloc mappings.
>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 4 ++--
> arch/x86/Kconfig | 1 +
> arch/x86/kernel/module.c | 4 ++--
> 3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index e3f9fd7ec106..ffce6591ae64 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1639,7 +1639,7 @@
> precedence over memory_hotplug.memmap_on_memory.
>
>
> - hugevmalloc= [KNL,PPC,ARM64] Reguires CONFIG_HAVE_ARCH_HUGE_VMALLOC
> + hugevmalloc= [KNL,PPC,ARM64,X86] Reguires CONFIG_HAVE_ARCH_HUGE_VMALLOC
> Format: { on | off }
> Default set by CONFIG_HUGE_VMALLOC_DEFAULT_ENABLED.
>
> @@ -3424,7 +3424,7 @@
>
> nohugeiomap [KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings.
>
> - nohugevmalloc [KNL,PPC,ARM64] Disable kernel huge vmalloc mappings.
> + nohugevmalloc [KNL,PPC,ARM64,X86] Disable kernel huge vmalloc mappings.
>
> nosmt [KNL,S390] Disable symmetric multithreading (SMT).
> Equivalent to smt=1.
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index ebe8fc76949a..f6bf6675bbe7 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -157,6 +157,7 @@ config X86
> select HAVE_ACPI_APEI_NMI if ACPI
> select HAVE_ALIGNED_STRUCT_PAGE if SLUB
> select HAVE_ARCH_AUDITSYSCALL
> + select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
> select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE
> select HAVE_ARCH_JUMP_LABEL
> select HAVE_ARCH_JUMP_LABEL_RELATIVE
> diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
> index 95fa745e310a..6bf5cb7d876a 100644
> --- a/arch/x86/kernel/module.c
> +++ b/arch/x86/kernel/module.c
> @@ -75,8 +75,8 @@ void *module_alloc(unsigned long size)
>
> p = __vmalloc_node_range(size, MODULE_ALIGN,
> MODULES_VADDR + get_module_load_offset(),
> - MODULES_END, gfp_mask,
> - PAGE_KERNEL, VM_DEFER_KMEMLEAK, NUMA_NO_NODE,
> + MODULES_END, gfp_mask, PAGE_KERNEL,
> + VM_DEFER_KMEMLEAK | VM_NO_HUGE_VMAP, NUMA_NO_NODE,
you should add a comment like powerpc (commit 8abddd968a30
("powerpc/64s/radix: Enable huge vmalloc mappings")) to explain why this
requires VM_NO_HUGE_VMAP
> __builtin_return_address(0));
> if (p && (kasan_module_alloc(p, size, gfp_mask) < 0)) {
> vfree(p);
