FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.


» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Redhat > Cluster Development

 
 
LinkBack Thread Tools
 
Old 01-21-2008, 08:21 AM
 
Default Remove flags no longer required

From: Steven Whitehouse <swhiteho@redhat.com>

The HIF_MUTEX and HIF_PROMOTE flags were set on the glock holders
depending upon which of the two waiters lists they were going to
be queued upon. They were then tested when the holders were taken
off the lists to ensure that the right type of holder was being
dequeued.

Since we are already using separate lists, there doesn't seem a
lot of point having these flags as well, and since setting them
and testing them is in the fast path for locking and unlocking
glock, this patch removes them.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index e668808..5fbd9d3 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -594,12 +594,7 @@ static void run_queue(struct gfs2_glock *gl)
if (!list_empty(&gl->gl_waiters1)) {
gh = list_entry(gl->gl_waiters1.next,
struct gfs2_holder, gh_list);
-
- if (test_bit(HIF_MUTEX, &gh->gh_iflags))
- blocked = rq_mutex(gh);
- else
- gfs2_assert_warn(gl->gl_sbd, 0);
-
+ blocked = rq_mutex(gh);
} else if (test_bit(GLF_DEMOTE, &gl->gl_flags)) {
blocked = rq_demote(gl);
if (gl->gl_waiters2 && !blocked) {
@@ -610,12 +605,7 @@ static void run_queue(struct gfs2_glock *gl)
} else if (!list_empty(&gl->gl_waiters3)) {
gh = list_entry(gl->gl_waiters3.next,
struct gfs2_holder, gh_list);
-
- if (test_bit(HIF_PROMOTE, &gh->gh_iflags))
- blocked = rq_promote(gh);
- else
- gfs2_assert_warn(gl->gl_sbd, 0);
-
+ blocked = rq_promote(gh);
} else
break;

@@ -636,7 +626,6 @@ static void gfs2_glmutex_lock(struct gfs2_glock *gl)
struct gfs2_holder gh;

gfs2_holder_init(gl, 0, 0, &gh);
- set_bit(HIF_MUTEX, &gh.gh_iflags);
if (test_and_set_bit(HIF_WAIT, &gh.gh_iflags))
BUG();

@@ -1160,8 +1149,6 @@ restart:
return -EIO;
}

- set_bit(HIF_PROMOTE, &gh->gh_iflags);
-
spin_lock(&gl->gl_spin);
add_to_queue(gh);
run_queue(gl);
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 089dba4..478023e 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -141,10 +141,6 @@ struct gfs2_glock_operations {
};

enum {
- /* Actions */
- HIF_MUTEX = 0,
- HIF_PROMOTE = 1,
-
/* States */
HIF_HOLDER = 6,
HIF_FIRST = 7,
--
1.5.1.2
 

Thread Tools




All times are GMT. The time now is 07:13 AM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright 2007 - 2008, www.linux-archive.org