Commit 6d23f8a5 authored by Michal Hocko's avatar Michal Hocko Committed by Linus Torvalds
Browse files

arch, mm: remove arch specific show_mem 

We have a generic implementation for quite some time already.  If there
is any arch specific information to be printed then we should add a
callback called from the generic code rather than duplicate the whole
show_mem.

The current code has resulted in the code duplication and the output
divergence which is both confusing and adds maintainance costs.

Let's just get rid of this mess.

Link: http://lkml.kernel.org/r/20170117091543.25850-4-mhocko@kernel.org


Signed-off-by: default avatarMichal Hocko <mhocko@suse.com>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [UniCore32]
Acked-by: Helge Deller <deller@gmx.de> [for parisc]
Acked-by: Chris Metcalf <cmetcalf@mellanox.com> [for tile]
Acked-by: default avatarMel Gorman <mgorman@suse.de>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a8e99259

arch/ia64/mm/init.c

+0 −48
Original line number Diff line number Diff line
@@ -684,51 +684,3 @@ int arch_remove_memory(u64 start, u64 size) 
}

#endif

#endif
 


/**

 * show_mem - give short summary of memory stats

 *

 * Shows a simple page count of reserved and used pages in the system.

 * For discontig machines, it does this on a per-pgdat basis.

 */

void show_mem(unsigned int filter)

{

	int total_reserved = 0;

	unsigned long total_present = 0;

	pg_data_t *pgdat;



	printk(KERN_INFO "Mem-info:\n");

	show_free_areas(filter);

	printk(KERN_INFO "Node memory in pages:\n");

	for_each_online_pgdat(pgdat) {

		unsigned long present;

		unsigned long flags;

		int reserved = 0;

		int nid = pgdat->node_id;

		int zoneid;



		if (skip_free_areas_node(filter, nid))

			continue;

		pgdat_resize_lock(pgdat, &flags);



		for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {

			struct zone *zone = &pgdat->node_zones[zoneid];

			if (!populated_zone(zone))

				continue;



			reserved += zone->present_pages - zone->managed_pages;

		}

		present = pgdat->node_present_pages;



		pgdat_resize_unlock(pgdat, &flags);

		total_present += present;

		total_reserved += reserved;

		printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, ",

		       nid, present, reserved);

	}

	printk(KERN_INFO "%ld pages of RAM\n", total_present);

	printk(KERN_INFO "%d reserved pages\n", total_reserved);

	printk(KERN_INFO "Total of %ld pages in page table cache\n",

	       quicklist_total_size());

	printk(KERN_INFO "%ld free buffer pages\n", nr_free_buffer_pages());

}

arch/parisc/mm/init.c

+0 −49
Original line number Diff line number Diff line
@@ -653,55 +653,6 @@ void __init mem_init(void) 
unsigned long *empty_zero_page __read_mostly;

EXPORT_SYMBOL(empty_zero_page);



void show_mem(unsigned int filter)

{

	int total = 0,reserved = 0;

	pg_data_t *pgdat;



	printk(KERN_INFO "Mem-info:\n");

	show_free_areas(filter);



	for_each_online_pgdat(pgdat) {

		unsigned long flags;

		int zoneid;



		pgdat_resize_lock(pgdat, &flags);

		for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {

			struct zone *zone = &pgdat->node_zones[zoneid];

			if (!populated_zone(zone))

				continue;



			total += zone->present_pages;

			reserved = zone->present_pages - zone->managed_pages;

		}

		pgdat_resize_unlock(pgdat, &flags);

	}



	printk(KERN_INFO "%d pages of RAM\n", total);

	printk(KERN_INFO "%d reserved pages\n", reserved);



#ifdef CONFIG_DISCONTIGMEM

	{

		struct zonelist *zl;

		int i, j;



		for (i = 0; i < npmem_ranges; i++) {

			zl = node_zonelist(i, 0);

			for (j = 0; j < MAX_NR_ZONES; j++) {

				struct zoneref *z;

				struct zone *zone;



				printk("Zone list for zone %d on node %d: ", j, i);

				for_each_zone_zonelist(zone, z, zl, j)

					printk("[%d/%s] ", zone_to_nid(zone),

								zone->name);

				printk("\n");

			}

		}

	}

#endif

}



/*

 * pagetable_init() sets up the page tables

 *

arch/sparc/mm/init_32.c

+0 −11
Original line number Diff line number Diff line
@@ -55,17 +55,6 @@ extern unsigned int sparc_ramdisk_size; 


unsigned long highstart_pfn, highend_pfn;



void show_mem(unsigned int filter)

{

	printk("Mem-info:\n");

	show_free_areas(filter);

	printk("Free swap:       %6ldkB\n",

	       get_nr_swap_pages() << (PAGE_SHIFT-10));

	printk("%ld pages of RAM\n", totalram_pages);

	printk("%ld free pages\n", nr_free_pages());

}





unsigned long last_valid_pfn;



unsigned long calc_highpages(void)

arch/tile/mm/pgtable.c

+0 −45
Original line number Diff line number Diff line
@@ -36,51 +36,6 @@ 


#define K(x) ((x) << (PAGE_SHIFT-10))



/*

 * The normal show_free_areas() is too verbose on Tile, with dozens

 * of processors and often four NUMA zones each with high and lowmem.

 */

void show_mem(unsigned int filter)

{

	struct zone *zone;



	pr_err("Active:%lu inactive:%lu dirty:%lu writeback:%lu unstable:%lu free:%lu\n slab:%lu mapped:%lu pagetables:%lu bounce:%lu pagecache:%lu swap:%lu\n",

	       (global_node_page_state(NR_ACTIVE_ANON) +

		global_node_page_state(NR_ACTIVE_FILE)),

	       (global_node_page_state(NR_INACTIVE_ANON) +

		global_node_page_state(NR_INACTIVE_FILE)),

	       global_node_page_state(NR_FILE_DIRTY),

	       global_node_page_state(NR_WRITEBACK),

	       global_node_page_state(NR_UNSTABLE_NFS),

	       global_page_state(NR_FREE_PAGES),

	       (global_page_state(NR_SLAB_RECLAIMABLE) +

		global_page_state(NR_SLAB_UNRECLAIMABLE)),

	       global_node_page_state(NR_FILE_MAPPED),

	       global_page_state(NR_PAGETABLE),

	       global_page_state(NR_BOUNCE),

	       global_node_page_state(NR_FILE_PAGES),

	       get_nr_swap_pages());



	for_each_zone(zone) {

		unsigned long flags, order, total = 0, largest_order = -1;



		if (!populated_zone(zone))

			continue;



		spin_lock_irqsave(&zone->lock, flags);

		for (order = 0; order < MAX_ORDER; order++) {

			int nr = zone->free_area[order].nr_free;

			total += nr << order;

			if (nr)

				largest_order = order;

		}

		spin_unlock_irqrestore(&zone->lock, flags);

		pr_err("Node %d %7s: %lukB (largest %luKb)\n",

		       zone_to_nid(zone), zone->name,

		       K(total), largest_order ? K(1UL) << largest_order : 0);

	}

}



/**

 * shatter_huge_page() - ensure a given address is mapped by a small page.

 *

arch/unicore32/mm/init.c

+0 −44
Original line number Diff line number Diff line
@@ -57,50 +57,6 @@ early_param("initrd", early_initrd); 
 */

struct meminfo meminfo;



void show_mem(unsigned int filter)

{

	int free = 0, total = 0, reserved = 0;

	int shared = 0, cached = 0, slab = 0, i;

	struct meminfo *mi = &meminfo;



	printk(KERN_DEFAULT "Mem-info:\n");

	show_free_areas(filter);



	for_each_bank(i, mi) {

		struct membank *bank = &mi->bank[i];

		unsigned int pfn1, pfn2;

		struct page *page, *end;



		pfn1 = bank_pfn_start(bank);

		pfn2 = bank_pfn_end(bank);



		page = pfn_to_page(pfn1);

		end  = pfn_to_page(pfn2 - 1) + 1;



		do {

			total++;

			if (PageReserved(page))

				reserved++;

			else if (PageSwapCache(page))

				cached++;

			else if (PageSlab(page))

				slab++;

			else if (!page_count(page))

				free++;

			else

				shared += page_count(page) - 1;

			page++;

		} while (page < end);

	}



	printk(KERN_DEFAULT "%d pages of RAM\n", total);

	printk(KERN_DEFAULT "%d free pages\n", free);

	printk(KERN_DEFAULT "%d reserved pages\n", reserved);

	printk(KERN_DEFAULT "%d slab pages\n", slab);

	printk(KERN_DEFAULT "%d pages shared\n", shared);

	printk(KERN_DEFAULT "%d pages swap cached\n", cached);

}



static void __init find_limits(unsigned long *min, unsigned long *max_low,

	unsigned long *max_high)

{

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