Attachment 144914 Details for Bug 221612 – patch accepted by Tony Luck and Andrew Morton.

[patch] patch accepted by Tony Luck and Andrew Morton.

show_mem.patch (text/plain), 3.36 KB, created by George Beshers on 2007-01-05 17:04:24 UTC

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Creator: George Beshers

Created: 2007-01-05 17:04:24 UTC

Size: 3.36 KB

patch

obsolete

>
>On the ia64 architecture only this patch upgrades show_mem()
>for sparse memory to be the same as it was for discontig memory.
>It has been shown to work on NUMA and flatmem architectures.
>
>Signed-off-by: George Beshers <gbeshers@sgi.com>
>
>diff -Naur Build-rc2.2/arch/ia64/mm/contig.c Build-rc2.0/arch/ia64/mm/contig.c
>--- Build-rc2.2/arch/ia64/mm/contig.c	2006-12-28 10:11:04.000000000 -0500
>+++ Build-rc2.0/arch/ia64/mm/contig.c	2007-01-02 09:15:51.000000000 -0500
>@@ -30,47 +30,69 @@
> #endif
> 
> /**
>- * show_mem - display a memory statistics summary
>+ * show_mem - give short summary of memory stats
>  *
>- * Just walks the pages in the system and describes where they're allocated.
>+ * 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 (void)
>+void show_mem(void)
> {
>-	int i, total = 0, reserved = 0;
>-	int shared = 0, cached = 0;
>+	int i, total_reserved = 0;
>+	int total_shared = 0, total_cached = 0;
>+	unsigned long total_present = 0;
>+	pg_data_t *pgdat;
> 
> 	printk(KERN_INFO "Mem-info:\n");
> 	show_free_areas();
>-
> 	printk(KERN_INFO "Free swap:       %6ldkB\n",
> 	       nr_swap_pages<<(PAGE_SHIFT-10));
>-	i = max_mapnr;
>-	for (i = 0; i < max_mapnr; i++) {
>-		if (!pfn_valid(i)) {
>+	printk(KERN_INFO "Node memory in pages:\n");
>+	for_each_online_pgdat(pgdat) {
>+		unsigned long present;
>+		unsigned long flags;
>+		int shared = 0, cached = 0, reserved = 0;
>+
>+		pgdat_resize_lock(pgdat, &flags);
>+		present = pgdat->node_present_pages;
>+		for(i = 0; i < pgdat->node_spanned_pages; i++) {
>+			struct page *page;
>+			if (pfn_valid(pgdat->node_start_pfn + i))
>+				page = pfn_to_page(pgdat->node_start_pfn + i);
>+			else {
> #ifdef CONFIG_VIRTUAL_MEM_MAP
>-			if (max_gap < LARGE_GAP)
>-				continue;
>-			i = vmemmap_find_next_valid_pfn(0, i) - 1;
>+				if (max_gap < LARGE_GAP)
>+					continue;
> #endif
>-			continue;
>+				i = vmemmap_find_next_valid_pfn(pgdat->node_id,
>+					 i) - 1;
>+				continue;
>+			}
>+			if (PageReserved(page))
>+				reserved++;
>+			else if (PageSwapCache(page))
>+				cached++;
>+			else if (page_count(page))
>+				shared += page_count(page)-1;
> 		}
>-		total++;
>-		if (PageReserved(mem_map+i))
>-			reserved++;
>-		else if (PageSwapCache(mem_map+i))
>-			cached++;
>-		else if (page_count(mem_map + i))
>-			shared += page_count(mem_map + i) - 1;
>+		pgdat_resize_unlock(pgdat, &flags);
>+		total_present += present;
>+		total_reserved += reserved;
>+		total_cached += cached;
>+		total_shared += shared;
>+		printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, "
>+		       "shrd: %10d, swpd: %10d\n", pgdat->node_id,
>+		       present, reserved, shared, cached);
> 	}
>-	printk(KERN_INFO "%d pages of RAM\n", total);
>-	printk(KERN_INFO "%d reserved pages\n", reserved);
>-	printk(KERN_INFO "%d pages shared\n", shared);
>-	printk(KERN_INFO "%d pages swap cached\n", cached);
>-	printk(KERN_INFO "%ld pages in page table cache\n",
>+	printk(KERN_INFO "%ld pages of RAM\n", total_present);
>+	printk(KERN_INFO "%d reserved pages\n", total_reserved);
>+	printk(KERN_INFO "%d pages shared\n", total_shared);
>+	printk(KERN_INFO "%d pages swap cached\n", total_cached);
>+	printk(KERN_INFO "Total of %ld pages in page table cache\n",
> 	       pgtable_quicklist_total_size());
>+	printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
> }
> 
>+
> /* physical address where the bootmem map is located */
> unsigned long bootmap_start;
>

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Attachments on bug 221612: 144914 | 216391 | 216401 | 216411 | 216421 | 216431 | 224591 | 224601 | 224611