linux-kernel - Re: (No subject)

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Date:   Tue, 28 Dec 2021 09:36:53 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     William Kucharski <william.kucharski@...cle.com>
CC:     Jonathan Corbet <corbet@....net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "Matthew Wilcox" <willy@...radead.org>
Subject: Re: (No subject)


On 2021/12/28 1:35, William Kucharski wrote:
> You should also fix the existing typo in the documentation (inline):
>
>> On Dec 27, 2021, at 07:49, Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>>
>> This patch select HAVE_ARCH_HUGE_VMALLOC to let arm64 support huge
>> vmalloc mappings.
>>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Cc: Will Deacon <will@...nel.org>
>> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
>> ---
>> Documentation/admin-guide/kernel-parameters.txt | 4 ++--
>> arch/arm64/Kconfig                              | 1 +
>> arch/arm64/kernel/module.c                      | 5 +++--
>> 3 files changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
>> index 7b2f900fd243..e3f9fd7ec106 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=    [PPC] Reguires CONFIG_HAVE_ARCH_HUGE_VMALLOC
>> +    hugevmalloc=    [KNL,PPC,ARM64] Reguires CONFIG_HAVE_ARCH_HUGE_VMALLOC
>>             Format: { on | off }
>>             Default set by CONFIG_HUGE_VMALLOC_DEFAULT_ENABLED.
> "Reguires" should be "Requires."
Will fix, thanks.
>
>> @@ -3424,7 +3424,7 @@
>>
>>     nohugeiomap    [KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings.
>>
>> -    nohugevmalloc    [PPC] Disable kernel huge vmalloc mappings.
>> +    nohugevmalloc    [KNL,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 3bb0b67292b5..c34bbb4482b0 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -142,6 +142,7 @@ 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
>> diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
>> index 309a27553c87..af7b4cbace2b 100644
>> --- a/arch/arm64/kernel/module.c
>> +++ b/arch/arm64/kernel/module.c
>> @@ -36,7 +36,8 @@ void *module_alloc(unsigned long size)
>>         module_alloc_end = MODULES_END;
>>
>>     p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
>> -                module_alloc_end, gfp_mask, PAGE_KERNEL, VM_DEFER_KMEMLEAK,
>> +                module_alloc_end, gfp_mask, PAGE_KERNEL,
>> +                VM_DEFER_KMEMLEAK | VM_NO_HUGE_VMAP,
>>                 NUMA_NO_NODE, __builtin_return_address(0));
>>
>>     if (!p && IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) &&
>> @@ -55,7 +56,7 @@ void *module_alloc(unsigned long size)
>>          */
>>         p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
>>                 module_alloc_base + SZ_2G, GFP_KERNEL,
>> -                PAGE_KERNEL, 0, NUMA_NO_NODE,
>> +                PAGE_KERNEL, VM_NO_HUGE_VMAP, NUMA_NO_NODE,
>>                 __builtin_return_address(0));
>>
>>     if (p && (kasan_module_alloc(p, size, gfp_mask) < 0)) {
>> -- 
>> 2.26.2
>>
>>