One leftover from the days of IBM's original code, is an SB counter
that counts in-flight asynchronous commands. And a piece of code that
waits for the counter to reach zero at unmount. I guess it might have
been needed then, cause of some reference missing or something.
I'm not removing it yet but am putting a warning message if ever this
counter triggers at unmount. If I'll never see it triggers or reported
I'll remove the counter for good.
(I had this print as a debug output for a long time and never had it
trigger)
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/exofs/super.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 2fa6df9..c4657db 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -409,6 +409,10 @@ static void exofs_put_super(struct super_block *sb)
for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
num_pend = atomic_read(&sbi->s_curr_pending)) {
wait_queue_head_t wq;
+
+ printk(KERN_NOTICE "%s: !!Pending operations in flight. "
+ "This is a BUG. please report to osd-dev@xxxxxxxxxxxx\n",
+ __func__);
init_waitqueue_head(&wq);
wait_event_timeout(wq,
(atomic_read(&sbi->s_curr_pending) == 0),
--
1.7.2.3
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