| Message ID | 20220907114950.125433-1-wangkefeng.wang@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: support huge vmalloc mappings | expand |
On Wed, Sep 07, 2022 at 07:49:50PM +0800, Kefeng Wang wrote: > As commit 59089e0a93d ("vmalloc: replace VM_NO_HUGE_VMAP with > VM_ALLOW_HUGE_VMAP"), the use of hugepage mappings for vmalloc What's this commit? I can't find it anywhere.
On 2022/9/10 1:38, Catalin Marinas wrote: > On Wed, Sep 07, 2022 at 07:49:50PM +0800, Kefeng Wang wrote: >> As commit 59089e0a93d ("vmalloc: replace VM_NO_HUGE_VMAP with >> VM_ALLOW_HUGE_VMAP"), the use of hugepage mappings for vmalloc > What's this commit? I can't find it anywhere. sorry, should be 559089e0a93d >
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 2434c6729f1c..33b7998f0170 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3617,7 +3617,7 @@ nohugeiomap [KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings. - nohugevmalloc [PPC] Disable kernel huge vmalloc mappings. + nohugevmalloc [KNL,X86,PPC,ARM64] Disable kernel huge vmalloc mappings. nosmt [KNL,S390] Disable symmetric multithreading (SMT). Equivalent to smt=1. diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b3073f6f6c3a..500979dfde37 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -149,6 +149,7 @@ config ARM64 select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_BITREVERSE select HAVE_ARCH_COMPILER_H + select HAVE_ARCH_HUGE_VMALLOC select HAVE_ARCH_HUGE_VMAP select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_JUMP_LABEL_RELATIVE
As commit 59089e0a93d ("vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP"), the use of hugepage mappings for vmalloc is an opt-in strategy, so it is saftly to support huge vmalloc mappings on arm64, for now, it is used in kvmalloc() and alloc_large_system_hash(). Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> --- Documentation/admin-guide/kernel-parameters.txt | 2 +- arch/arm64/Kconfig | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)