From fd95e5f425172ac934cfc0434288328351bcbd55 Mon Sep 17 00:00:00 2001
From: tianzy <tianzy>
Date: Wed, 5 Nov 2008 09:20:02 +0000
Subject: [PATCH] Branch HEAD fix panic on debug_daemon b=15878 i=shadow
i=zhenyu.xu
---
libcfs/libcfs/tracefile.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/libcfs/libcfs/tracefile.c b/libcfs/libcfs/tracefile.c
index 6913c44f37..eaebd77f4e 100644
--- a/libcfs/libcfs/tracefile.c
+++ b/libcfs/libcfs/tracefile.c
@@ -835,7 +835,9 @@ int trace_daemon_command(char *str)
tracefile_write_lock();
if (strcmp(str, "stop") == 0) {
- trace_stop_thread();
+ tracefile_write_unlock();
+ trace_stop_thread();
+ tracefile_write_lock();
memset(tracefile, 0, sizeof(tracefile));
} else if (strncmp(str, "size=", 5) == 0) {
@@ -1029,6 +1031,25 @@ static int tracefiled(void *arg)
cfs_filp_close(filp);
put_pages_on_daemon_list(&pc);
+ if (!list_empty(&pc.pc_pages)) {
+ int i;
+
+ printk(KERN_ALERT "Lustre: trace pages aren't empty\n");
+ printk(KERN_ERR "total cpus(%d): ", num_possible_cpus());
+ for (i = 0; i < num_possible_cpus(); i++)
+ if (cpu_online(i))
+ printk(KERN_ERR "%d(on) ", i);
+ else
+ printk(KERN_ERR "%d(off) ", i);
+ printk(KERN_ERR "\n");
+
+ i = 0;
+ list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
+ linkage)
+ printk(KERN_ERR "page %d belongs to cpu %d\n",
+ ++i, tage->cpu);
+ printk(KERN_ERR "There are %d pages unwritten\n", i);
+ }
__LASSERT(list_empty(&pc.pc_pages));
}
complete(&tctl->tctl_stop);
--
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