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Subject: Re: [PATCH V5 5/6] riscv: crash_core: Export kernel vm layout,
 phys_ram_base
To:     Bagas Sanjaya <bagasdotme@gmail.com>
Cc:     paul.walmsley@sifive.com, palmer@dabbelt.com,
        aou@eecs.berkeley.edu, anup@brainfault.org, heiko@sntech.de,
        guoren@kernel.org, mick@ics.forth.gr,
        alexandre.ghiti@canonical.com, bhe@redhat.com, vgoyal@redhat.com,
        dyoung@redhat.com, corbet@lwn.net, Conor.Dooley@microchip.com,
        kexec@lists.infradead.org, linux-doc@vger.kernel.org,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        crash-utility@redhat.com, huanyi.xj@alibaba-inc.com,
        heinrich.schuchardt@canonical.com, k-hagio-ab@nec.com,
        hschauhan@nulltrace.org, yixun.lan@gmail.com
References: <20220802121818.2201268-1-xianting.tian@linux.alibaba.com>
 <20220802121818.2201268-6-xianting.tian@linux.alibaba.com>
 <YvRyT5f5uH7LBs4H@debian.me>
From:   Xianting Tian <xianting.tian@linux.alibaba.com>
Message-ID: <81bf1acd-307c-b093-44c2-280c70f44e08@linux.alibaba.com>
Date:   Thu, 11 Aug 2022 11:37:32 +0800
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在 2022/8/11 上午11:06, Bagas Sanjaya 写道:
> On Tue, Aug 02, 2022 at 08:18:17PM +0800, Xianting Tian wrote:
>> These infos are needed by the kdump crash tool. Since these values change
>> from time to time, it is preferable to export them via vmcoreinfo than to
>> change the crash's code frequently.
>>
> I have to agree with Conor.Dooley, that this patch is misleading (I see
> documentation instead of real export). So IMO, the patch subject should
> be "Documentation: kdump: describe VMCOREINFO export for RISCV64".
>
> For MODULES_VADDR and friends, the doc can be improved, like:
>
> diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst
> index 6b76284a503ca5..6694acc32c3588 100644
> --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst
> +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst
> @@ -615,14 +615,13 @@ phys_ram_base
>   
>   Indicates the start physical RAM address.
>   
> -MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END
> ------------------------------------------------------------------------------
> -KASAN_SHADOW_START|KASAN_SHADOW_END|KERNEL_LINK_ADDR|ADDRESS_SPACE_END
> -----------------------------------------------------------------------
> +MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END|KASAN_SHADOW_START|KASAN_SHADOW_END|KERNEL_LINK_ADDR|ADDRESS_SPACE_END
> +----------------------------------------------------------------------------------------------------------------------------------------------------
>   
>   Used to get the correct ranges:
> -	MODULES_VADDR ~ MODULES_END : Kernel module space.
> -	VMALLOC_START ~ VMALLOC_END : vmalloc() / ioremap() space.
> -	VMEMMAP_START ~ VMEMMAP_END : vmemmap region, used for struct page array.
> -	KASAN_SHADOW_START ~ KASAN_SHADOW_END : kasan shadow space.
> -	KERNEL_LINK_ADDR ~ ADDRESS_SPACE_END : Kernel link and BPF space.
> +
> +  * MODULES_VADDR ~ MODULES_END : Kernel module space.
> +  * VMALLOC_START ~ VMALLOC_END : vmalloc() / ioremap() space.
> +  * VMEMMAP_START ~ VMEMMAP_END : vmemmap region, used for struct page array.
> +  * KASAN_SHADOW_START ~ KASAN_SHADOW_END : kasan shadow space.
> +  * KERNEL_LINK_ADDR ~ ADDRESS_SPACE_END : Kernel link and BPF space.
Thanks for the comment, I will fix it in V6
>
> Thanks.
>