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From: Baoquan He <bhe@redhat.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: Rich Felker <dalias@libc.org>,
	linux-ia64@vger.kernel.org, linux-doc@vger.kernel.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Michal Hocko <mhocko@kernel.org>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	Max Filippov <jcmvbkbc@gmail.com>, Guo Ren <guoren@kernel.org>,
	linux-csky@vger.kernel.org, linux-parisc@vger.kernel.org,
	sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	Greg Ungerer <gerg@linux-m68k.org>,
	linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
	linux-snps-arc@lists.infradead.org, linux-c6x-dev@linux-c6x.org,
	Brian Cain <bcain@codeaurora.org>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-sh@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
	Helge Deller <deller@gmx.de>,
	x86@kernel.org, Russell King <linux@armlinux.org.uk>,
	Ley Foon Tan <ley.foon.>
Subject: Re: [PATCH 16/21] mm: remove early_pfn_in_nid() and CONFIG_NODES_SPAN_OTHER_NODES
Date: Thu, 23 Apr 2020 09:13:12 +0800
Message-ID: <20200423011312.GY4247@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20200412194859.12663-17-rppt@kernel.org>

On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
> 
> The commit f47ac088c406 ("mm: memmap_init: iterate over memblock regions

This commit id should be a temporary one, will be changed when merged
into maintainer's tree and linus's tree. Only saying last patch plus the
patch subject is OK?

> rather that check each PFN") made early_pfn_in_nid() obsolete and since
> CONFIG_NODES_SPAN_OTHER_NODES is only used to pick a stub or a real
> implementation of early_pfn_in_nid() it is also not needed anymore.
> 
> Remove both early_pfn_in_nid() and the CONFIG_NODES_SPAN_OTHER_NODES.
> 
> Co-developed-by: Hoan Tran <Hoan@os.amperecomputing.com>
> Signed-off-by: Hoan Tran <Hoan@os.amperecomputing.com>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
>  arch/powerpc/Kconfig |  9 ---------
>  arch/sparc/Kconfig   |  9 ---------
>  arch/x86/Kconfig     |  9 ---------
>  mm/page_alloc.c      | 20 --------------------
>  4 files changed, 47 deletions(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 5f86b22b7d2c..74f316deeae1 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -685,15 +685,6 @@ config ARCH_MEMORY_PROBE
>  	def_bool y
>  	depends on MEMORY_HOTPLUG
>  
> -# Some NUMA nodes have memory ranges that span
> -# other nodes.  Even though a pfn is valid and
> -# between a node's start and end pfns, it may not
> -# reside on that node.  See memmap_init_zone()
> -# for details.
> -config NODES_SPAN_OTHER_NODES
> -	def_bool y
> -	depends on NEED_MULTIPLE_NODES
> -
>  config STDBINUTILS
>  	bool "Using standard binutils settings"
>  	depends on 44x
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index 795206b7b552..0e4f3891b904 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -286,15 +286,6 @@ config NODES_SHIFT
>  	  Specify the maximum number of NUMA Nodes available on the target
>  	  system.  Increases memory reserved to accommodate various tables.
>  
> -# Some NUMA nodes have memory ranges that span
> -# other nodes.  Even though a pfn is valid and
> -# between a node's start and end pfns, it may not
> -# reside on that node.  See memmap_init_zone()
> -# for details.
> -config NODES_SPAN_OTHER_NODES
> -	def_bool y
> -	depends on NEED_MULTIPLE_NODES
> -
>  config ARCH_SPARSEMEM_ENABLE
>  	def_bool y if SPARC64
>  	select SPARSEMEM_VMEMMAP_ENABLE
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 9d3e95b4fb85..37dac095659e 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1581,15 +1581,6 @@ config X86_64_ACPI_NUMA
>  	---help---
>  	  Enable ACPI SRAT based node topology detection.
>  
> -# Some NUMA nodes have memory ranges that span
> -# other nodes.  Even though a pfn is valid and
> -# between a node's start and end pfns, it may not
> -# reside on that node.  See memmap_init_zone()
> -# for details.
> -config NODES_SPAN_OTHER_NODES
> -	def_bool y
> -	depends on X86_64_ACPI_NUMA
> -
>  config NUMA_EMU
>  	bool "NUMA emulation"
>  	depends on NUMA
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index c43ce8709457..343d87b8697d 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -1541,26 +1541,6 @@ int __meminit early_pfn_to_nid(unsigned long pfn)
>  }
>  #endif /* CONFIG_NEED_MULTIPLE_NODES */
>  
> -#ifdef CONFIG_NODES_SPAN_OTHER_NODES
> -/* Only safe to use early in boot when initialisation is single-threaded */
> -static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
> -{
> -	int nid;
> -
> -	nid = __early_pfn_to_nid(pfn, &early_pfnnid_cache);
> -	if (nid >= 0 && nid != node)
> -		return false;
> -	return true;
> -}
> -
> -#else
> -static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
> -{
> -	return true;
> -}
> -#endif

And macro early_pfn_valid() is not needed either, we may need remove it
too. 

Otherwise, removing NODES_SPAN_OTHER_NODES in this patch looks good.

Reviewed-by: Baoquan He <bhe@redhat.com>

> -
> -
>  void __init memblock_free_pages(struct page *page, unsigned long pfn,
>  							unsigned int order)
>  {
> -- 
> 2.25.1
> 

  reply index

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-12 19:48 [PATCH 00/21] mm: rework free_area_init*() funcitons Mike Rapoport
2020-04-12 19:48 ` [PATCH 01/21] mm: memblock: replace dereferences of memblock_region.nid with API calls Mike Rapoport
2020-04-21  2:06   ` Baoquan He
2020-04-12 19:48 ` [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other Mike Rapoport
2020-04-21  2:24   ` Baoquan He
2020-04-21  8:49     ` Mike Rapoport
2020-04-21  8:49       ` Mike Rapoport
2020-04-21  9:33       ` Baoquan He
2020-04-21  3:31   ` Baoquan He
2020-04-21  8:39     ` Mike Rapoport
2020-04-21  8:39       ` Mike Rapoport
2020-04-12 19:48 ` [PATCH 03/21] mm: remove CONFIG_HAVE_MEMBLOCK_NODE_MAP option Mike Rapoport
2020-04-21  4:23   ` Baoquan He
2020-04-21  9:09     ` Mike Rapoport
2020-04-21  9:09       ` Mike Rapoport
2020-04-21  9:45       ` Baoquan He
2020-04-12 19:48 ` [PATCH 04/21] mm: free_area_init: use maximal zone PFNs rather than zone sizes Mike Rapoport
2020-04-22 23:41   ` Baoquan He
2020-06-15  3:53   ` Greg Ungerer
2020-06-15  6:22     ` Mike Rapoport
2020-06-15  6:22       ` Mike Rapoport
2020-06-15  7:17       ` Greg Ungerer
2020-04-12 19:48 ` [PATCH 05/21] mm: use free_area_init() instead of free_area_init_nodes() Mike Rapoport
2020-04-23  0:02   ` Baoquan He
2020-04-12 19:48 ` [PATCH 06/21] alpha: simplify detection of memory zone boundaries Mike Rapoport
2020-04-12 19:48 ` [PATCH 07/21] arm: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 08/21] arm64: simplify detection of memory zone boundaries for UMA configs Mike Rapoport
2020-04-12 19:48 ` [PATCH 09/21] csky: simplify detection of memory zone boundaries Mike Rapoport
2020-04-12 19:48 ` [PATCH 10/21] m68k: mm: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 11/21] parisc: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 12/21] sparc32: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 13/21] unicore32: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 14/21] xtensa: " Mike Rapoport
2020-04-12 19:48 ` [PATCH 15/21] mm: memmap_init: iterate over memblock regions rather that check each PFN Mike Rapoport
2020-04-20 14:26   ` Qian Cai
2020-04-24  7:22   ` David Hildenbrand
2020-04-25 16:49     ` Mike Rapoport
2020-04-25 16:49       ` Mike Rapoport
2020-04-12 19:48 ` [PATCH 16/21] mm: remove early_pfn_in_nid() and CONFIG_NODES_SPAN_OTHER_NODES Mike Rapoport
2020-04-23  1:13   ` Baoquan He [this message]
2020-04-23  5:50     ` Mike Rapoport
2020-04-23  5:50       ` Mike Rapoport
2020-05-18 21:38     ` Hoan Tran
2020-04-12 19:48 ` [PATCH 17/21] mm: free_area_init: allow defining max_zone_pfn in descending order Mike Rapoport
2020-04-23  2:53   ` Baoquan He
2020-04-23  2:57     ` Baoquan He
2020-04-23  5:55       ` Mike Rapoport
2020-04-23  5:55         ` Mike Rapoport
2020-04-24  0:33         ` Baoquan He
2020-04-12 19:48 ` [PATCH 18/21] mm: rename free_area_init_node() to free_area_init_memoryless_node() Mike Rapoport
2020-04-23  3:14   ` Baoquan He
2020-04-23  6:18     ` Mike Rapoport
2020-04-23  6:18       ` Mike Rapoport
2020-04-12 19:48 ` [PATCH 19/21] mm: clean up free_area_init_node() and its helpers Mike Rapoport
2020-04-12 19:48 ` [PATCH 20/21] mm: simplify find_min_pfn_with_active_regions() Mike Rapoport
2020-04-12 19:48 ` [PATCH 21/21] docs/vm: update memory-models documentation Mike Rapoport

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