7 files changed, 46 insertions, 99 deletions

diff --git a/fs/gfs2/daemon.c b/fs/gfs2/daemon.c
index cab1f68d468..683cb5bda87 100644
--- a/fs/gfs2/daemon.c
+++ b/fs/gfs2/daemon.c
@@ -112,6 +112,7 @@ int gfs2_logd(void *data)
         struct gfs2_sbd *sdp = data;
         struct gfs2_holder ji_gh;
         unsigned long t;
+        int need_flush;
 
         while (!kthread_should_stop()) {
                 /* Advance the log tail */
@@ -120,8 +121,10 @@ int gfs2_logd(void *data)
                     gfs2_tune_get(sdp, gt_log_flush_secs) * HZ;
 
                 gfs2_ail1_empty(sdp, DIO_ALL);
-
-                if (time_after_eq(jiffies, t)) {
+                gfs2_log_lock(sdp);
+                need_flush = sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks);
+                gfs2_log_unlock(sdp);
+                if (need_flush || time_after_eq(jiffies, t)) {
                         gfs2_log_flush(sdp, NULL);
                         sdp->sd_log_flush_time = jiffies;
                 }
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index b8ba4d5c1d9..3c2ff81c84e 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -785,21 +785,6 @@ out:
                 gfs2_holder_put(new_gh);
 }
 
-void gfs2_glock_inode_squish(struct inode *inode)
-{
-        struct gfs2_holder gh;
-        struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
-        gfs2_holder_init(gl, LM_ST_UNLOCKED, 0, &gh);
-        set_bit(HIF_DEMOTE, &gh.gh_iflags);
-        spin_lock(&gl->gl_spin);
-        gfs2_assert(inode->i_sb->s_fs_info, list_empty(&gl->gl_holders));
-        list_add_tail(&gh.gh_list, &gl->gl_waiters2);
-        run_queue(gl);
-        spin_unlock(&gl->gl_spin);
-        wait_for_completion(&gh.gh_wait);
-        gfs2_holder_uninit(&gh);
-}
-
 /**
  * state_change - record that the glock is now in a different state
  * @gl: the glock
@@ -1920,7 +1905,7 @@ out:
 
 static void scan_glock(struct gfs2_glock *gl)
 {
-        if (gl->gl_ops == &gfs2_inode_glops)
+        if (gl->gl_ops == &gfs2_inode_glops && gl->gl_object)
                 return;
 
         if (gfs2_glmutex_trylock(gl)) {
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index a331bf8175e..fb39108fc05 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -106,7 +106,6 @@ void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
 void gfs2_glock_prefetch_num(struct gfs2_sbd *sdp, u64 number,
                              const struct gfs2_glock_operations *glops,
                              unsigned int state, int flags);
-void gfs2_glock_inode_squish(struct inode *inode);
 
 /**
  * gfs2_glock_nq_init - intialize a holder and enqueue it on a glock
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 60561ca070c..b068d10bcb6 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -107,70 +107,6 @@ static void gfs2_pte_inval(struct gfs2_glock *gl)
 }
 
 /**
- * gfs2_page_inval - Invalidate all pages associated with a glock
- * @gl: the glock
- *
- */
-
-static void gfs2_page_inval(struct gfs2_glock *gl)
-{
-        struct gfs2_inode *ip;
-        struct inode *inode;
-
-        ip = gl->gl_object;
-        inode = &ip->i_inode;
-        if (!ip || !S_ISREG(inode->i_mode))
-                return;
-
-        truncate_inode_pages(inode->i_mapping, 0);
-        gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !inode->i_mapping->nrpages);
-        clear_bit(GIF_PAGED, &ip->i_flags);
-}
-
-/**
- * gfs2_page_wait - Wait for writeback of data
- * @gl: the glock
- *
- * Syncs data (not metadata) for a regular file.
- * No-op for all other types.
- */
-
-static void gfs2_page_wait(struct gfs2_glock *gl)
-{
-        struct gfs2_inode *ip = gl->gl_object;
-        struct inode *inode = &ip->i_inode;
-        struct address_space *mapping = inode->i_mapping;
-        int error;
-
-        if (!S_ISREG(inode->i_mode))
-                return;
-
-        error = filemap_fdatawait(mapping);
-
-        /* Put back any errors cleared by filemap_fdatawait()
-           so they can be caught by someone who can pass them
-           up to user space. */
-
-        if (error == -ENOSPC)
-                set_bit(AS_ENOSPC, &mapping->flags);
-        else if (error)
-                set_bit(AS_EIO, &mapping->flags);
-
-}
-
-static void gfs2_page_writeback(struct gfs2_glock *gl)
-{
-        struct gfs2_inode *ip = gl->gl_object;
-        struct inode *inode = &ip->i_inode;
-        struct address_space *mapping = inode->i_mapping;
-
-        if (!S_ISREG(inode->i_mode))
-                return;
-
-        filemap_fdatawrite(mapping);
-}
-
-/**
  * meta_go_sync - sync out the metadata for this glock
  * @gl: the glock
  *
@@ -264,11 +200,24 @@ static void inode_go_drop_th(struct gfs2_glock *gl)
 
 static void inode_go_sync(struct gfs2_glock *gl)
 {
+        struct gfs2_inode *ip = gl->gl_object;
+
+        if (ip && !S_ISREG(ip->i_inode.i_mode))
+                ip = NULL;
+
         if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
-                gfs2_page_writeback(gl);
                 gfs2_log_flush(gl->gl_sbd, gl);
+                if (ip)
+                        filemap_fdatawrite(ip->i_inode.i_mapping);
                 gfs2_meta_sync(gl);
-                gfs2_page_wait(gl);
+                if (ip) {
+                        struct address_space *mapping = ip->i_inode.i_mapping;
+                        int error = filemap_fdatawait(mapping);
+                        if (error == -ENOSPC)
+                                set_bit(AS_ENOSPC, &mapping->flags);
+                        else if (error)
+                                set_bit(AS_EIO, &mapping->flags);
+                }
                 clear_bit(GLF_DIRTY, &gl->gl_flags);
                 gfs2_ail_empty_gl(gl);
         }
@@ -283,14 +232,20 @@ static void inode_go_sync(struct gfs2_glock *gl)
 
 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 {
+        struct gfs2_inode *ip = gl->gl_object;
         int meta = (flags & DIO_METADATA);
 
         if (meta) {
-                struct gfs2_inode *ip = gl->gl_object;
                 gfs2_meta_inval(gl);
-                set_bit(GIF_INVALID, &ip->i_flags);
+                if (ip)
+                        set_bit(GIF_INVALID, &ip->i_flags);
+        }
+
+        if (ip && S_ISREG(ip->i_inode.i_mode)) {
+                truncate_inode_pages(ip->i_inode.i_mapping, 0);
+                gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !ip->i_inode.i_mapping->nrpages);
+                clear_bit(GIF_PAGED, &ip->i_flags);
         }
-        gfs2_page_inval(gl);
 }
 
 /**
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 0cace3da9db..6456fc39aac 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -261,6 +261,12 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
  * @sdp: The GFS2 superblock
  * @blks: The number of blocks to reserve
  *
+ * Note that we never give out the last 6 blocks of the journal. Thats
+ * due to the fact that there is are a small number of header blocks
+ * associated with each log flush. The exact number can't be known until
+ * flush time, so we ensure that we have just enough free blocks at all
+ * times to avoid running out during a log flush.
+ *
  * Returns: errno
  */
 
@@ -274,7 +280,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 
         mutex_lock(&sdp->sd_log_reserve_mutex);
         gfs2_log_lock(sdp);
-        while(sdp->sd_log_blks_free <= blks) {
+        while(sdp->sd_log_blks_free <= (blks + 6)) {
                 gfs2_log_unlock(sdp);
                 gfs2_ail1_empty(sdp, 0);
                 gfs2_log_flush(sdp, NULL);
@@ -643,12 +649,9 @@ void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
         up_read(&sdp->sd_log_flush_lock);
 
         gfs2_log_lock(sdp);
-        if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) {
-                gfs2_log_unlock(sdp);
-                gfs2_log_flush(sdp, NULL);
-        } else {
-                gfs2_log_unlock(sdp);
-        }
+        if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks))
+                wake_up_process(sdp->sd_logd_process);
+        gfs2_log_unlock(sdp);
 }
 
 /**
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 3912d6a4b1e..939a09f6e88 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -472,6 +472,9 @@ int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
         struct buffer_head *bh = NULL, **bh_slot = ip->i_cache + height;
         int in_cache = 0;
 
+        BUG_ON(!gl);
+        BUG_ON(!sdp);
+
         spin_lock(&ip->i_spin);
         if (*bh_slot && (*bh_slot)->b_blocknr == num) {
                 bh = *bh_slot;
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 86351756922..7685b46f934 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -157,7 +157,8 @@ static void gfs2_write_super(struct super_block *sb)
 static int gfs2_sync_fs(struct super_block *sb, int wait)
 {
         sb->s_dirt = 0;
-        gfs2_log_flush(sb->s_fs_info, NULL);
+        if (wait)
+                gfs2_log_flush(sb->s_fs_info, NULL);
         return 0;
 }
 
@@ -293,8 +294,6 @@ static void gfs2_clear_inode(struct inode *inode)
          */
         if (inode->i_private) {
                 struct gfs2_inode *ip = GFS2_I(inode);
-                gfs2_glock_inode_squish(inode);
-                gfs2_assert(inode->i_sb->s_fs_info, ip->i_gl->gl_state == LM_ST_UNLOCKED);
                 ip->i_gl->gl_object = NULL;
                 gfs2_glock_schedule_for_reclaim(ip->i_gl);
                 gfs2_glock_put(ip->i_gl);
@@ -395,7 +394,7 @@ static void gfs2_delete_inode(struct inode *inode)
         if (!inode->i_private)
                 goto out;
 
-        error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &gh);
+        error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB, &gh);
         if (unlikely(error)) {
                 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
                 goto out;