[PATCH v7 1/5] drivers/base/node: Optimize memory block registration to reduce boot time

[Donet Tom]

On 6/4/25 8:37 AM, Andrew Morton wrote:
> On Wed, 28 May 2025 12:18:00 -0500 Donet Tom <donettom at linux.ibm.com> wrote:
>
>> During node device initialization, `memory blocks` are registered under
>> each NUMA node. The `memory blocks` to be registered are identified using
>> the node’s start and end PFNs, which are obtained from the node's pg_data
> It's quite unconventional to omit the [0/N] changelog.  This omission
> somewhat messed up my processes so I added a one-liner to this.


Sorry, Andrew. I’ll include the cover letter in the next revision and 
make sure to follow this for all future patches.


>
>> ...
>>
>> Test Results on My system with 32TB RAM
>> =======================================
>> 1. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT enabled.
>>
>> Without this patch
>> ------------------
>> Startup finished in 1min 16.528s (kernel)
>>
>> With this patch
>> ---------------
>> Startup finished in 17.236s (kernel) - 78% Improvement
> Well someone is in for a nice surprise.
>
>> 2. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT disabled.
>>
>> Without this patch
>> ------------------
>> Startup finished in 28.320s (kernel)
> what.  CONFIG_DEFERRED_STRUCT_PAGE_INIT is supposed to make bootup
> faster.
>
>