[PATCH] sparc64: Be less verbose during vmemmap population.

[PATCH] sparc64: Be less verbose during vmemmap population.

[David Miller]

On a 2-node machine with 256GB of ram we get 512 lines of
console output, which is just too much.

This mimicks Yinghai Lu's x86 commit c2b91e2eec9678dbda274e906cc32ea8f711da3b
(x86_64/mm: check and print vmemmap allocation continuous) except that
we aren't ever going to get contiguous block pointers in between calls
so just print when the virtual address or node changes.

This decreases the output by an order of 16.

Also demote this to KERN_DEBUG.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

Committed to 'sparc'.

 arch/sparc/mm/init_64.c |   28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 6026fdd..d58edf5 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2020,6 +2020,9 @@ EXPORT_SYMBOL(_PAGE_CACHE);
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
 unsigned long vmemmap_table[VMEMMAP_SIZE];
 
+static long __meminitdata addr_start, addr_end;
+static int __meminitdata node_start;
+
 int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
 {
 	unsigned long vstart = (unsigned long) start;
@@ -2050,15 +2053,30 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
 
 			*vmem_pp = pte_base | __pa(block);
 
-			printk(KERN_INFO "[%p-%p] page_structs=%lu "
-			       "node=%d entry=%lu/%lu\n", start, block, nr,
-			       node,
-			       addr >> VMEMMAP_CHUNK_SHIFT,
-			       VMEMMAP_SIZE);
+			/* check to see if we have contiguous blocks */
+			if (addr_end != addr || node_start != node) {
+				if (addr_start)
+					printk(KERN_DEBUG " [%lx-%lx] on node %d\n",
+					       addr_start, addr_end-1, node_start);
+				addr_start = addr;
+				node_start = node;
+			}
+			addr_end = addr + VMEMMAP_CHUNK;
 		}
 	}
 	return 0;
 }
+
+void __meminit vmemmap_populate_print_last(void)
+{
+	if (addr_start) {
+		printk(KERN_DEBUG " [%lx-%lx] on node %d\n",
+		       addr_start, addr_end-1, node_start);
+		addr_start = 0;
+		addr_end = 0;
+		node_start = 0;
+	}
+}
 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
 
 static void prot_init_common(unsigned long page_none,
-- 
1.7.10.4

Re: [PATCH] sparc64: Be less verbose during vmemmap population.

[Sam Ravnborg]

> 
> diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
> index 6026fdd..d58edf5 100644
> --- a/arch/sparc/mm/init_64.c
> +++ b/arch/sparc/mm/init_64.c
> +
> +void __meminit vmemmap_populate_print_last(void)
> +{
> +	if (addr_start) {
> +		printk(KERN_DEBUG " [%lx-%lx] on node %d\n",
> +		       addr_start, addr_end-1, node_start);
> +		addr_start = 0;
> +		addr_end = 0;
> +		node_start = 0;
> +	}
> +}
This confused me... I saw you added a function whích was never used.
include/linux/mm.h had a protoype with no comments at all !?!?
But then I could see we have a weak version defined in mm/
and you just add the arch version which overrides the waeak version.

A small comment would have helped me here.
But on the other hand you followed the comment style for this anyway :-(

	Sam - going to grab some coffe to be less grumble