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| author | Wendy Cheng <wcheng@redhat.com> | 2007-10-05 00:27:58 -0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-01-25 08:07:09 +0000 |
| commit | cc7e79b168a552152299bd8a8254dc099aacc993 (patch) | |
| tree | 65871c8ec495401846bc9e7030a89d3c6335f5ee /fs/gfs2/incore.h | |
| parent | 49914084e797530d9baaf51df9eda77babc98fa8 (diff) | |
| download | lwn-cc7e79b168a552152299bd8a8254dc099aacc993.tar.gz lwn-cc7e79b168a552152299bd8a8254dc099aacc993.zip | |
[GFS2] Handle multiple glock demote requests
Fix a race condition where multiple glock demote requests are sent to
a node back-to-back. This patch does a check inside handle_callback()
to see whether a demote request is in progress. If true, it sets a flag
to make sure run_queue() will loop again to handle the new request,
instead of erronously setting gl_demote_state to a different state.
Signed-off-by: S. Wendy Cheng <wcheng@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/incore.h')
| -rw-r--r-- | fs/gfs2/incore.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index eaddfb5a8e6f..662182bfbff7 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -171,6 +171,7 @@ enum { GLF_DEMOTE = 3, GLF_PENDING_DEMOTE = 4, GLF_DIRTY = 5, + GLF_DEMOTE_IN_PROGRESS = 6, }; struct gfs2_glock { @@ -190,6 +191,7 @@ struct gfs2_glock { struct list_head gl_holders; struct list_head gl_waiters1; /* HIF_MUTEX */ struct list_head gl_waiters3; /* HIF_PROMOTE */ + int gl_waiters2; /* GIF_DEMOTE */ const struct gfs2_glock_operations *gl_ops; |