mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

GFS2: Move umount flush rwsem 

The rwsem, used only on umount, is in the wrong place in glock.c.
This patch moves it up a bit so that it does not get called under
a spinlock.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2009-04-07 14:01:34 +01:00
parent 5cf32524de
commit a228df6339
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/gfs2/glock.c
View File

@ -597,7 +597,6 @@ __acquires(&gl->gl_spin)
GLOCK_BUG_ON(gl, test_bit(GLF_DEMOTE_IN_PROGRESS, &gl->gl_flags));
down_read(&gfs2_umount_flush_sem);
if (test_bit(GLF_DEMOTE, &gl->gl_flags) &&
gl->gl_demote_state != gl->gl_state) {
if (find_first_holder(gl))
@ -614,15 +613,14 @@ __acquires(&gl->gl_spin)
if (ret == 0)
goto out_unlock;
if (ret == 2)
goto out_sem;
goto out;
gh = find_first_waiter(gl);
gl->gl_target = gh->gh_state;
if (!(gh->gh_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB)))
do_error(gl, 0); /* Fail queued try locks */
}
do_xmote(gl, gh, gl->gl_target);
out_sem:
up_read(&gfs2_umount_flush_sem);
out:
return;
out_sched:
@ -631,7 +629,7 @@ out_sched:
gfs2_glock_put(gl);
out_unlock:
clear_bit(GLF_LOCK, &gl->gl_flags);
goto out_sem;
goto out;
}
static void glock_work_func(struct work_struct *work)
@ -641,6 +639,7 @@ static void glock_work_func(struct work_struct *work)
if (test_and_clear_bit(GLF_REPLY_PENDING, &gl->gl_flags))
finish_xmote(gl, gl->gl_reply);
down_read(&gfs2_umount_flush_sem);
spin_lock(&gl->gl_spin);
if (test_and_clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags) &&
gl->gl_state != LM_ST_UNLOCKED &&
@ -653,6 +652,7 @@ static void glock_work_func(struct work_struct *work)
}
run_queue(gl, 0);
spin_unlock(&gl->gl_spin);
up_read(&gfs2_umount_flush_sem);
if (!delay ||
queue_delayed_work(glock_workqueue, &gl->gl_work, delay) == 0)
gfs2_glock_put(gl);