[PATCH v12 7/7] x86/crash: Add x86 crash hotplug support
Eric DeVolder
eric.devolder at oracle.com
Fri Oct 28 13:34:43 PDT 2022
On 10/28/22 15:30, Borislav Petkov wrote:
> On Fri, Oct 28, 2022 at 02:26:58PM -0500, Eric DeVolder wrote:
>> config CRASH_MAX_MEMORY_RANGES
>> depends on CRASH_DUMP && KEXEC_FILE && MEMORY_HOTPLUG
>> int
>> default 8192
>> help
>> For the kexec_file_load path, specify the maximum number of
>> memory regions, eg. as represented by the 'System RAM' entries
>> in /proc/iomem, that the elfcorehdr buffer/segment can accommodate.
>> This value is combined with NR_CPUS and multiplied by Elf64_Phdr
>> size to determine the final buffer size.
>
> No, do this:
>
> config CRASH_MEMORY_HOTPLUG_SUPPORT
> depends on CRASH_DUMP && KEXEC_FILE && MEMORY_HOTPLUG
> help
> Help text explaining what this feature is
>
> this thing will simply get enabled when the user enables MEMORY_HOTPLUG
> and CRASH_DUMP.
>
> and then you do in the code:
>
> /*
> * A comment explaining how the 8192 value has been selected.
> */
> #define CRASH_MAX_MEMORY_RANGES 8192
>
> Thx.
>
ok, will do!
thanks!
eric
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