X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Foom_kill.c;h=10367654ae774fba2072698e1fac470174d8698e;hb=4e950f6f0189f65f8bf069cf2272649ef418f5e4;hp=3791edfffeebe9595f54ce7d04fe424832aa6af5;hpb=d6454706c382ab74e2ecad7803c434cc6bd30343;p=linux-2.6

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 3791edfffe..10367654ae 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -17,6 +17,7 @@
 
 #include <linux/oom.h>
 #include <linux/mm.h>
+#include <linux/err.h>
 #include <linux/sched.h>
 #include <linux/swap.h>
 #include <linux/timex.h>
@@ -147,9 +148,11 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
 	 * Adjust the score by oomkilladj.
 	 */
 	if (p->oomkilladj) {
-		if (p->oomkilladj > 0)
+		if (p->oomkilladj > 0) {
+			if (!points)
+				points = 1;
 			points <<= p->oomkilladj;
-		else
+		} else
 			points >>= -(p->oomkilladj);
 	}
 
@@ -397,6 +400,7 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 	struct task_struct *p;
 	unsigned long points = 0;
 	unsigned long freed = 0;
+	int constraint;
 
 	blocking_notifier_call_chain(&oom_notify_list, 0, &freed);
 	if (freed > 0)
@@ -411,14 +415,18 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 		show_mem();
 	}
 
-	cpuset_lock();
-	read_lock(&tasklist_lock);
+	if (sysctl_panic_on_oom == 2)
+		panic("out of memory. Compulsory panic_on_oom is selected.\n");
 
 	/*
 	 * Check if there were limitations on the allocation (only relevant for
 	 * NUMA) that may require different handling.
 	 */
-	switch (constrained_alloc(zonelist, gfp_mask)) {
+	constraint = constrained_alloc(zonelist, gfp_mask);
+	cpuset_lock();
+	read_lock(&tasklist_lock);
+
+	switch (constraint) {
 	case CONSTRAINT_MEMORY_POLICY:
 		oom_kill_process(current, points,
 				"No available memory (MPOL_BIND)");