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-rw-r--r--fs/fs-writeback.c40
1 files changed, 20 insertions, 20 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 300324bd563..c0076077d33 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -284,7 +284,17 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc)
* soon as the queue becomes uncongested.
*/
inode->i_state |= I_DIRTY_PAGES;
- requeue_io(inode);
+ if (wbc->nr_to_write <= 0) {
+ /*
+ * slice used up: queue for next turn
+ */
+ requeue_io(inode);
+ } else {
+ /*
+ * somehow blocked: retry later
+ */
+ redirty_tail(inode);
+ }
} else {
/*
* Otherwise fully redirty the inode so that
@@ -334,9 +344,6 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
WARN_ON(inode->i_state & I_WILL_FREE);
if ((wbc->sync_mode != WB_SYNC_ALL) && (inode->i_state & I_SYNC)) {
- struct address_space *mapping = inode->i_mapping;
- int ret;
-
/*
* We're skipping this inode because it's locked, and we're not
* doing writeback-for-data-integrity. Move it to s_more_io so
@@ -345,15 +352,7 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
* completed a full scan of s_io.
*/
requeue_io(inode);
-
- /*
- * Even if we don't actually write the inode itself here,
- * we can at least start some of the data writeout..
- */
- spin_unlock(&inode_lock);
- ret = do_writepages(mapping, wbc);
- spin_lock(&inode_lock);
- return ret;
+ return 0;
}
/*
@@ -479,8 +478,12 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
iput(inode);
cond_resched();
spin_lock(&inode_lock);
- if (wbc->nr_to_write <= 0)
+ if (wbc->nr_to_write <= 0) {
+ wbc->more_io = 1;
break;
+ }
+ if (!list_empty(&sb->s_more_io))
+ wbc->more_io = 1;
}
return; /* Leave any unwritten inodes on s_io */
}
@@ -512,8 +515,7 @@ writeback_inodes(struct writeback_control *wbc)
might_sleep();
spin_lock(&sb_lock);
restart:
- sb = sb_entry(super_blocks.prev);
- for (; sb != sb_entry(&super_blocks); sb = sb_entry(sb->s_list.prev)) {
+ list_for_each_entry_reverse(sb, &super_blocks, s_list) {
if (sb_has_dirty_inodes(sb)) {
/* we're making our own get_super here */
sb->s_count++;
@@ -578,10 +580,8 @@ static void set_sb_syncing(int val)
{
struct super_block *sb;
spin_lock(&sb_lock);
- sb = sb_entry(super_blocks.prev);
- for (; sb != sb_entry(&super_blocks); sb = sb_entry(sb->s_list.prev)) {
+ list_for_each_entry_reverse(sb, &super_blocks, s_list)
sb->s_syncing = val;
- }
spin_unlock(&sb_lock);
}
@@ -655,7 +655,7 @@ int write_inode_now(struct inode *inode, int sync)
int ret;
struct writeback_control wbc = {
.nr_to_write = LONG_MAX,
- .sync_mode = WB_SYNC_ALL,
+ .sync_mode = sync ? WB_SYNC_ALL : WB_SYNC_NONE,
.range_start = 0,
.range_end = LLONG_MAX,
};