1 files changed, 23 insertions, 2 deletions

diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index ee7eec9ee576..23d54413c006 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -908,7 +908,7 @@ no_mod:
 static void
 ia64_wait_for_slaves(int monarch)
 {
-        int c, wait = 0;
+        int c, wait = 0, missing = 0;
         for_each_online_cpu(c) {
                 if (c == monarch)
                         continue;
@@ -919,15 +919,32 @@ ia64_wait_for_slaves(int monarch)
                 }
         }
         if (!wait)
-                return;
+                goto all_in;
         for_each_online_cpu(c) {
                 if (c == monarch)
                         continue;
                 if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) {
                         udelay(5*1000000);      /* wait 5 seconds for slaves (arbitrary) */
+                        if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE)
+                                missing = 1;
                         break;
                 }
         }
+        if (!missing)
+                goto all_in;
+        printk(KERN_INFO "OS MCA slave did not rendezvous on cpu");
+        for_each_online_cpu(c) {
+                if (c == monarch)
+                        continue;
+                if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE)
+                        printk(" %d", c);
+        }
+        printk("\n");
+        return;
+
+all_in:
+        printk(KERN_INFO "All OS MCA slaves have reached rendezvous\n");
+        return;
 }
 
 /*
@@ -953,6 +970,10 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
         task_t *previous_current;
 
         oops_in_progress = 1;   /* FIXME: make printk NMI/MCA/INIT safe */
+        console_loglevel = 15;  /* make sure printks make it to console */
+        printk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d monarch=%ld\n",
+                sos->proc_state_param, cpu, sos->monarch);
+
         previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
         monarch_cpu = cpu;
         if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, 0, 0, 0)