[patch] pre9-2 shm balance

[Rik van Riel <riel@conectiva.com.br>]

Hi Linus,

with quintela's latest patch and the small patch below, the
system works fine again, even under heavy shm stress testing.

regards,

Rik
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--- ipc/shm.c.orig	Wed May 17 22:59:47 2000
+++ ipc/shm.c	Wed May 17 23:24:52 2000
@@ -1468,7 +1468,7 @@
 }
 
 /*
- * Goes through counter = (shm_rss >> prio) present shm pages.
+ * Goes through counter = (shm_rss / (prio + 1)) present shm pages.
  */
 static unsigned long swap_id; /* currently being swapped */
 static unsigned long swap_idx; /* next to swap */
@@ -1483,7 +1483,7 @@
 	struct page * page_map;
 
 	zshm_swap(prio, gfp_mask);
-	counter = shm_rss >> prio;
+	counter = shm_rss / (prio + 1);
 	if (!counter)
 		return 0;
 	if (shm_swap_preop(&swap_entry))
@@ -1809,7 +1809,7 @@
 	int counter;
 	struct page * page_map;
 
-	counter = zshm_rss >> prio;
+	counter = zshm_rss / (prio + 1);
 	if (!counter)
 		return;
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