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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: Wei Yang <richard.weiyang@gmail.com> Link: https://lore.kernel.org/r/20240525023040.13509-3-richard.weiyang@gmail.com Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
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mm/mm_init.c
14
mm/mm_init.c
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@ -676,6 +676,14 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
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if (early_page_ext_enabled())
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return false;
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/* Always populate low zones for address-constrained allocations */
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if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))
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return false;
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if (NODE_DATA(nid)->first_deferred_pfn != ULONG_MAX)
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return true;
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/*
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* prev_end_pfn static that contains the end of previous zone
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* No need to protect because called very early in boot before smp_init.
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@ -685,12 +693,6 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
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nr_initialised = 0;
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}
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/* Always populate low zones for address-constrained allocations */
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if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))
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return false;
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if (NODE_DATA(nid)->first_deferred_pfn != ULONG_MAX)
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return true;
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/*
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* We start only with one section of pages, more pages are added as
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* needed until the rest of deferred pages are initialized.
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