Commit 922306a2 authored by Wei Yang's avatar Wei Yang Committed by Mike Rapoport (IBM)
Browse files

mm/mm_init.c: move nr_initialised reset down a bit 



We don't need to count nr_initialised in two cases:

* for low zones that are always populated
* after first_deferred_pfn is detected

Let's move the nr_initialised reset down a bit to reduce some comparison
of prev_end_pfn and end_pfn.

Signed-off-by: default avatarWei Yang <richard.weiyang@gmail.com>
Link: https://lore.kernel.org/r/20240525023040.13509-3-richard.weiyang@gmail.com


Signed-off-by: default avatarMike Rapoport (IBM) <rppt@kernel.org>
parent 93bbbcb1

mm/mm_init.c

+8 −6
Original line number Diff line number Diff line
@@ -676,6 +676,14 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn) 


	if (early_page_ext_enabled())

		return false;



	/* Always populate low zones for address-constrained allocations */

	if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))

		return false;



	if (NODE_DATA(nid)->first_deferred_pfn != ULONG_MAX)

		return true;



	/*

	 * prev_end_pfn static that contains the end of previous zone

	 * No need to protect because called very early in boot before smp_init.
@@ -685,12 +693,6 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn) 
		nr_initialised = 0;

	}



	/* Always populate low zones for address-constrained allocations */

	if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))

		return false;



	if (NODE_DATA(nid)->first_deferred_pfn != ULONG_MAX)

		return true;

	/*

	 * We start only with one section of pages, more pages are added as

	 * needed until the rest of deferred pages are initialized.