hugetlb: printk cleanup

- Reword sentence to clarify meaning with multiple options
- Add support for using GB prefixes for the page size
- Add extra printk to delayed > MAX_ORDER allocation code

Acked-by: Adam Litke <agl@us.ibm.com>
Acked-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 4 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 243a8684d180..0c74c14dd2f7 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1006,15 +1006,27 @@ static void __init hugetlb_init_hstates(void)
         }
 }
 
+static char * __init memfmt(char *buf, unsigned long n)
+{
+        if (n >= (1UL << 30))
+                sprintf(buf, "%lu GB", n >> 30);
+        else if (n >= (1UL << 20))
+                sprintf(buf, "%lu MB", n >> 20);
+        else
+                sprintf(buf, "%lu KB", n >> 10);
+        return buf;
+}
+
 static void __init report_hugepages(void)
 {
         struct hstate *h;
 
         for_each_hstate(h) {
-                printk(KERN_INFO "Total HugeTLB memory allocated, "
-                                "%ld %dMB pages\n",
-                                h->free_huge_pages,
-                                1 << (h->order + PAGE_SHIFT - 20));
+                char buf[32];
+                printk(KERN_INFO "HugeTLB registered %s page size, "
+                                 "pre-allocated %ld pages\n",
+                        memfmt(buf, huge_page_size(h)),
+                        h->free_huge_pages);
         }
 }