[PATCH] makedumpfile: show needed memory

[Cliff Wickman]

From: Cliff Wickman <cpw at sgi.com>

If there is not enough memory available to run in cyclic mode display
how much more would be needed to do so.

Diffed against makedumpfile-1.5.4
Signed-off-by: Cliff Wickman <cpw at sgi.com>
---
 makedumpfile.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Index: makedumpfile-1.5.4/makedumpfile.c
===================================================================
--- makedumpfile-1.5.4.orig/makedumpfile.c
+++ makedumpfile-1.5.4/makedumpfile.c
@@ -7778,11 +7778,15 @@ plenty_of_memory(void)
 {
 	unsigned long free_size;
 	unsigned long needed_size;
+	long slack = 10; /* 10M extra */
+	long meg = 1024*1024;
 
 	free_size = get_free_memory_size();
-	needed_size = (info->max_mapnr * 2) / BITPERBYTE;
-	if (free_size > (needed_size + (10*1024*1024)))
+	needed_size = ((info->max_mapnr * 2) / BITPERBYTE) + (slack * meg);
+	if (free_size > needed_size)
 		return 1;
+	PROGRESS_MSG("Need %ldM more memory to use noncyclic mode.\n",
+		(needed_size - free_size)/meg);
 	return 0;
 }