Re: [PATCH v12 7/7] x86/crash: Add x86 crash hotplug support

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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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