qa: log messages when falling back to force/lazy umount

We suspect that we may be hitting races against lazy umounts that are
causing problems when enumerating debugfs files. Currently though we
don't log anything special when falling back to a lazy unmount. Log
a message when killing processes on a mount and when force+lazy
unmounting.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

diff --git a/qa/tasks/cephfs/kernel_mount.py b/qa/tasks/cephfs/kernel_mount.py
index e02d2b1be71ff4224787bdbab45f5f17adad0858..9f725a8faa0f3b4106eda905914467dbc939f7d9 100644 (file)
--- a/qa/tasks/cephfs/kernel_mount.py
+++ b/qa/tasks/cephfs/kernel_mount.py
@@ -105,6 +105,7 @@ class KernelMount(CephFSMount):
                 cmd.append('-f')
             self.client_remote.run(args=cmd, timeout=(15*60), omit_sudo=False)
         except Exception as e:
+            log.debug('Killing processes on client.{id}...'.format(id=self.client_id))
             self.client_remote.run(
                 args=['sudo', run.Raw('PATH=/usr/sbin:$PATH'), 'lsof',
                       run.Raw(';'), 'ps', 'auxf'],
@@ -129,6 +130,7 @@ class KernelMount(CephFSMount):
                 raise
 
             # force delete the netns and umount
+            log.debug('Force/lazy unmounting on client.{id}...'.format(id=self.client_id))
             self.client_remote.run(args=['sudo', 'umount', '-f', '-l',
                                          self.mountpoint],
                                    timeout=(15*60), omit_sudo=False)