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authorBob Peterson <rpeterso@redhat.com>2014-06-26 10:46:25 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2014-07-18 11:13:56 +0100
commit5bef3e7cf18c56cc733777c61b6b61a0b8a62b35 (patch)
treea3b75df7abfcb6dcb77139cf23c540e51d761f7e
parent6ec43b1838bd71633ac3f853c63ddf1f5940b1ed (diff)
GFS2: Allow flocks to use normal glock dq rather than dq_wait
This patch allows flock glocks to use a non-blocking dequeue rather than dq_wait. It also reverts the previous patch I had posted regarding dq_wait. The reverted patch isn't necessarily a bad idea, but I decided this might avoid unforeseen side effects, and was therefore safer. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
-rw-r--r--fs/gfs2/file.c2
-rw-r--r--fs/gfs2/glock.c4
2 files changed, 2 insertions, 4 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 4fc3a3046174..491e8e023598 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -991,7 +991,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
goto out;
flock_lock_file_wait(file,
&(struct file_lock){.fl_type = F_UNLCK});
- gfs2_glock_dq_wait(fl_gh);
+ gfs2_glock_dq(fl_gh);
gfs2_holder_reinit(state, flags, fl_gh);
} else {
error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr,
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index b703dcc91588..ee4e04fe60fc 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1128,9 +1128,7 @@ void gfs2_glock_dq_wait(struct gfs2_holder *gh)
struct gfs2_glock *gl = gh->gh_gl;
gfs2_glock_dq(gh);
might_sleep();
- if (!find_first_holder(gl))
- wait_on_bit(&gl->gl_flags, GLF_DEMOTE, gfs2_glock_demote_wait,
- TASK_UNINTERRUPTIBLE);
+ wait_on_bit(&gl->gl_flags, GLF_DEMOTE, gfs2_glock_demote_wait, TASK_UNINTERRUPTIBLE);
}
/**

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