From 4d376b8641c9401eaa1006f14e3c6c6088c2b043 Mon Sep 17 00:00:00 2001
From: huanghua <huanghua>
Date: Wed, 19 Nov 2008 02:29:18 +0000
Subject: [PATCH] Branch HEAD b=17083 i=johann
add warning message while waiting for exports to be destroyed.
---
lustre/mdt/mdt_handler.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index 50869dcd87..5b9a3d9246 100644
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -4082,6 +4082,7 @@ static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
struct lu_device *d = &m->mdt_md_dev.md_lu_dev;
struct lu_site *ls = d->ld_site;
struct obd_device *obd = mdt2obd_dev(m);
+ int waited = 0;
ENTRY;
/* At this point, obd exports might still be on the "obd_zombie_exports"
@@ -4094,8 +4095,16 @@ static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
* The three references that should be remaining are the
* obd_self_export and the attach and setup references.
*/
- while (atomic_read(&obd->obd_refcount) > 3)
+ while (atomic_read(&obd->obd_refcount) > 3) {
cfs_schedule_timeout(CFS_TASK_UNINT, cfs_time_seconds(1));
+ ++waited;
+ if (waited > 5 && IS_PO2(waited))
+ LCONSOLE_WARN("Waiting for obd_zombie_impexp_thread "
+ "more than %d seconds to destroy all "
+ "the exports. The current obd refcount ="
+ " %d. Is it stuck there?\n",
+ waited, atomic_read(&obd->obd_refcount));
+ }
ping_evictor_stop();
--
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