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From: Mike Rapoport <rppt@kernel.org>
To: Baoquan He <bhe@redhat.com>
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 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
Date: Tue, 21 Apr 2020 11:49:35 +0300
Message-ID: <20200421084935.GB14260@kernel.org> (raw)
In-Reply-To: <20200421022435.GP4247@MiWiFi-R3L-srv>

On Tue, Apr 21, 2020 at 10:24:35AM +0800, Baoquan He wrote:
> On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> > 
> > The early_pfn_to_nid() and it's helper __early_pfn_to_nid() are spread
> > around include/linux/mm.h, include/linux/mmzone.h and mm/page_alloc.c.
> > 
> > Drop unused stub for __early_pfn_to_nid() and move its actual generic
> > implementation close to its users.
> > 
> > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> > ---
> >  include/linux/mm.h     |  4 ++--
> >  include/linux/mmzone.h |  9 --------
> >  mm/page_alloc.c        | 51 +++++++++++++++++++++---------------------
> >  3 files changed, 27 insertions(+), 37 deletions(-)
> > 
> > diff --git a/include/linux/mm.h b/include/linux/mm.h
> > index 5a323422d783..a404026d14d4 100644
> > --- a/include/linux/mm.h
> > +++ b/include/linux/mm.h
> > @@ -2388,9 +2388,9 @@ extern void sparse_memory_present_with_active_regions(int nid);
> >  
> >  #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \
> >      !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID)
> > -static inline int __early_pfn_to_nid(unsigned long pfn,
> > -					struct mminit_pfnnid_cache *state)
> > +static inline int early_pfn_to_nid(unsigned long pfn)
> >  {
> > +	BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA));
> >  	return 0;
> >  }
> 
> It's better to make a separate patch to drop __early_pfn_to_nid() here.

Not sure it's really worth it.
This patch anyway only moves the code around without any actual changes.

> >  #else
> > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> > index 1b9de7d220fb..7b5b6eba402f 100644
> > --- a/include/linux/mmzone.h
> > +++ b/include/linux/mmzone.h
> > @@ -1078,15 +1078,6 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist,
> >  #include <asm/sparsemem.h>
> >  #endif
> >  
> > -#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \
> > -	!defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
> > -static inline unsigned long early_pfn_to_nid(unsigned long pfn)
> > -{
> > -	BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA));
> > -	return 0;
> > -}
> > -#endif
> > -
> >  #ifdef CONFIG_FLATMEM
> >  #define pfn_to_nid(pfn)		(0)
> >  #endif
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 0d012eda1694..1ac775bfc9cf 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -1504,6 +1504,31 @@ void __free_pages_core(struct page *page, unsigned int order)
> 
> #if defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) || \
>         defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
> 
> This is the upper layer of ifdeffery scope.
> >  
> >  static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
> >  
> > +#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
> 
> Moving __early_pfn_to_nid() here makes the upper layer of ifdeferry
> scope a little werid. But seems no better way to optimize it.

It gets a bit better after patch 3 :)

> Otherwise, this patch looks good to me.
> 
> Reviewed-by: Baoquan He <bhe@redhat.com>

Thanks!

> > +
> > +/*
> > + * Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
> > + */
> > +int __meminit __early_pfn_to_nid(unsigned long pfn,
> > +					struct mminit_pfnnid_cache *state)
> > +{
> > +	unsigned long start_pfn, end_pfn;
> > +	int nid;
> > +
> > +	if (state->last_start <= pfn && pfn < state->last_end)
> > +		return state->last_nid;
> > +
> > +	nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn);
> > +	if (nid != NUMA_NO_NODE) {
> > +		state->last_start = start_pfn;
> > +		state->last_end = end_pfn;
> > +		state->last_nid = nid;
> > +	}
> > +
> > +	return nid;
> > +}
> > +#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
> > +
> >  int __meminit early_pfn_to_nid(unsigned long pfn)
> >  {
> >  	static DEFINE_SPINLOCK(early_pfn_lock);
> > @@ -6298,32 +6323,6 @@ void __meminit init_currently_empty_zone(struct zone *zone,
> >  	zone->initialized = 1;
> >  }
> >  
> > -#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
> > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
> > -
> > -/*
> > - * Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
> > - */
> > -int __meminit __early_pfn_to_nid(unsigned long pfn,
> > -					struct mminit_pfnnid_cache *state)
> > -{
> > -	unsigned long start_pfn, end_pfn;
> > -	int nid;
> > -
> > -	if (state->last_start <= pfn && pfn < state->last_end)
> > -		return state->last_nid;
> > -
> > -	nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn);
> > -	if (nid != NUMA_NO_NODE) {
> > -		state->last_start = start_pfn;
> > -		state->last_end = end_pfn;
> > -		state->last_nid = nid;
> > -	}
> > -
> > -	return nid;
> > -}
> > -#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
> > -
> >  /**
> >   * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range
> >   * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
> > -- 
> > 2.25.1
> > 
> 

-- 
Sincerely yours,
Mike.

From: Mike Rapoport <rppt@kernel.org>
To: Baoquan He <bhe@redhat.com>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Brian Cain <bcain@codeaurora.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	"David S. Miller" <davem@davemloft.net>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Greentime Hu <green.hu@gmail.com>,
	Greg Ungerer <gerg@linux-m68k.org>, Guan Xuetao <gxt@pku.edu.cn>,
	Guo Ren <guoren@kernel.org>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Helge Deller <deller@gmx.de>,
	Hoan Tran <Hoan@os.amperecomputing.com>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Ley Foon Tan <ley.foon.tan@intel.com>,
	Mark Salter <msalter@redhat.com>,
	Matt Turner <mattst88@gmail.com>,
	Max Filippov <jcmvbkbc@gmail.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Michal Hocko <mhocko@kernel.org>, Michal Simek <monstr@monstr.eu>,
	Nick Hu <nickhu@andestech.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Richard Weinberger <richard@nod.at>,
	Rich Felker <dalias@libc.org>,
	Russell King <linux@armlinux.org.uk>,
	Stafford Horne <shorne@gmail.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Tony Luck <tony.luck@intel.com>,
	Vineet Gupta <vgupta@synopsys.com>,
	x86@kernel.org, Yoshinori Sato <ysato@users.sourceforge.jp>,
	linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-c6x-dev@linux-c6x.org, linux-csky@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-hexagon@vger.kernel.org,
	linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
	linux-mips@vger.kernel.org, linux-mm@kvack.org,
	linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
	linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org,
	linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org,
	openrisc@lists.librecores.org, sparclinux@vger.kernel.org,
	uclinux-h8-devel@lists.sourceforge.jp,
	Mike Rapoport <rppt@linux.ibm.com>
Subject: Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
Date: Tue, 21 Apr 2020 11:49:35 +0300
Message-ID: <20200421084935.GB14260@kernel.org> (raw)
Message-ID: <20200421084935.nLOhN0hbaUC_0E_P-QlD7J1mad02qef3CxRiC8vRzXY@z> (raw)
In-Reply-To: <20200421022435.GP4247@MiWiFi-R3L-srv>

On Tue, Apr 21, 2020 at 10:24:35AM +0800, Baoquan He wrote:
> On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> > 
> > The early_pfn_to_nid() and it's helper __early_pfn_to_nid() are spread
> > around include/linux/mm.h, include/linux/mmzone.h and mm/page_alloc.c.
> > 
> > Drop unused stub for __early_pfn_to_nid() and move its actual generic
> > implementation close to its users.
> > 
> > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> > ---
> >  include/linux/mm.h     |  4 ++--
> >  include/linux/mmzone.h |  9 --------
> >  mm/page_alloc.c        | 51 +++++++++++++++++++++---------------------
> >  3 files changed, 27 insertions(+), 37 deletions(-)
> > 
> > diff --git a/include/linux/mm.h b/include/linux/mm.h
> > index 5a323422d783..a404026d14d4 100644
> > --- a/include/linux/mm.h
> > +++ b/include/linux/mm.h
> > @@ -2388,9 +2388,9 @@ extern void sparse_memory_present_with_active_regions(int nid);
> >  
> >  #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \
> >      !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID)
> > -static inline int __early_pfn_to_nid(unsigned long pfn,
> > -					struct mminit_pfnnid_cache *state)
> > +static inline int early_pfn_to_nid(unsigned long pfn)
> >  {
> > +	BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA));
> >  	return 0;
> >  }
> 
> It's better to make a separate patch to drop __early_pfn_to_nid() here.

Not sure it's really worth it.
This patch anyway only moves the code around without any actual changes.

> >  #else
> > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> > index 1b9de7d220fb..7b5b6eba402f 100644
> > --- a/include/linux/mmzone.h
> > +++ b/include/linux/mmzone.h
> > @@ -1078,15 +1078,6 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist,
> >  #include <asm/sparsemem.h>
> >  #endif
> >  
> > -#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \
> > -	!defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
> > -static inline unsigned long early_pfn_to_nid(unsigned long pfn)
> > -{
> > -	BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA));
> > -	return 0;
> > -}
> > -#endif
> > -
> >  #ifdef CONFIG_FLATMEM
> >  #define pfn_to_nid(pfn)		(0)
> >  #endif
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 0d012eda1694..1ac775bfc9cf 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -1504,6 +1504,31 @@ void __free_pages_core(struct page *page, unsigned int order)
> 
> #if defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) || \
>         defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
> 
> This is the upper layer of ifdeffery scope.
> >  
> >  static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
> >  
> > +#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
> 
> Moving __early_pfn_to_nid() here makes the upper layer of ifdeferry
> scope a little werid. But seems no better way to optimize it.

It gets a bit better after patch 3 :)

> Otherwise, this patch looks good to me.
> 
> Reviewed-by: Baoquan He <bhe@redhat.com>

Thanks!

> > +
> > +/*
> > + * Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
> > + */
> > +int __meminit __early_pfn_to_nid(unsigned long pfn,
> > +					struct mminit_pfnnid_cache *state)
> > +{
> > +	unsigned long start_pfn, end_pfn;
> > +	int nid;
> > +
> > +	if (state->last_start <= pfn && pfn < state->last_end)
> > +		return state->last_nid;
> > +
> > +	nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn);
> > +	if (nid != NUMA_NO_NODE) {
> > +		state->last_start = start_pfn;
> > +		state->last_end = end_pfn;
> > +		state->last_nid = nid;
> > +	}
> > +
> > +	return nid;
> > +}
> > +#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
> > +
> >  int __meminit early_pfn_to_nid(unsigned long pfn)
> >  {
> >  	static DEFINE_SPINLOCK(early_pfn_lock);
> > @@ -6298,32 +6323,6 @@ void __meminit init_currently_empty_zone(struct zone *zone,
> >  	zone->initialized = 1;
> >  }
> >  
> > -#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
> > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
> > -
> > -/*
> > - * Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
> > - */
> > -int __meminit __early_pfn_to_nid(unsigned long pfn,
> > -					struct mminit_pfnnid_cache *state)
> > -{
> > -	unsigned long start_pfn, end_pfn;
> > -	int nid;
> > -
> > -	if (state->last_start <= pfn && pfn < state->last_end)
> > -		return state->last_nid;
> > -
> > -	nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn);
> > -	if (nid != NUMA_NO_NODE) {
> > -		state->last_start = start_pfn;
> > -		state->last_end = end_pfn;
> > -		state->last_nid = nid;
> > -	}
> > -
> > -	return nid;
> > -}
> > -#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
> > -
> >  /**
> >   * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range
> >   * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
> > -- 
> > 2.25.1
> > 
> 

-- 
Sincerely yours,
Mike.

  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 [this message]
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
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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Linux-arch Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-arch/0 linux-arch/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-arch linux-arch/ https://lore.kernel.org/linux-arch \
		linux-arch@vger.kernel.org
	public-inbox-index linux-arch

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-arch


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git