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authorSteven Whitehouse <swhiteho@redhat.com>2008-06-03 14:09:53 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2008-06-27 09:39:44 +0100
commit1bdad606338debc6384b2844f1b53cc436b3ac90 (patch)
tree7929bc1f652f88f104e8b6fa6a424cd211b50a42 /fs/gfs2/glock.c
parent9171f5a991e7613cbee816874ad8c9515dcab50f (diff)
downloadop-kernel-dev-1bdad606338debc6384b2844f1b53cc436b3ac90.zip
op-kernel-dev-1bdad606338debc6384b2844f1b53cc436b3ac90.tar.gz
[GFS2] Remove remote lock dropping code
There are several reasons why this is undesirable: 1. It never happens during normal operation anyway 2. If it does happen it causes performance to be very, very poor 3. It isn't likely to solve the original problem (memory shortage on remote DLM node) it was supposed to solve 4. It uses a bunch of arbitrary constants which are unlikely to be correct for any particular situation and for which the tuning seems to be a black art. 5. In an N node cluster, only 1/N of the dropped locked will actually contribute to solving the problem on average. So all in all we are better off without it. This also makes merging the lock_dlm module into GFS2 a bit easier. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/glock.c')
-rw-r--r--fs/gfs2/glock.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index be7ed50..8d5450f 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1316,11 +1316,6 @@ void gfs2_glock_cb(void *cb_data, unsigned int type, void *data)
wake_up_process(sdp->sd_recoverd_process);
return;
- case LM_CB_DROPLOCKS:
- gfs2_gl_hash_clear(sdp, NO_WAIT);
- gfs2_quota_scan(sdp);
- return;
-
default:
gfs2_assert_warn(sdp, 0);
return;
@@ -1508,11 +1503,10 @@ static void clear_glock(struct gfs2_glock *gl)
* @sdp: the filesystem
* @wait: wait until it's all gone
*
- * Called when unmounting the filesystem, or when inter-node lock manager
- * requests DROPLOCKS because it is running out of capacity.
+ * Called when unmounting the filesystem.
*/
-void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait)
+void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
{
unsigned long t;
unsigned int x;
@@ -1527,7 +1521,7 @@ void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait)
cont = 1;
}
- if (!wait || !cont)
+ if (!cont)
break;
if (time_after_eq(jiffies,
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