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authorPatrick McHardy <kaber@trash.net>2013-03-31 18:10:34 +0200
committerPatrick McHardy <kaber@trash.net>2013-03-31 18:10:34 +0200
commit70711d223510ba1773cfe1d7770a56141c815ff8 (patch)
tree4a71f38a3a554ddecaa31b7d8c6bc49b7d1705b4 /fs/fs-writeback.c
parentd53b4ed072d9779cdf53582c46436dec06d0961f (diff)
parent19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff)
Merge tag 'v3.8' of /home/kaber/src/repos/linux
Linux 3.8 Signed-off-by: Patrick McHardy <kaber@trash.net> Conflicts: include/linux/Kbuild include/linux/netlink.h
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 41a3ccff18d..310972b72a6 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -52,11 +52,6 @@ struct wb_writeback_work {
struct completion *done; /* set if the caller waits */
};
-/*
- * We don't actually have pdflush, but this one is exported though /proc...
- */
-int nr_pdflush_threads;
-
/**
* writeback_in_progress - determine whether there is writeback in progress
* @bdi: the device's backing_dev_info structure.
@@ -68,6 +63,7 @@ int writeback_in_progress(struct backing_dev_info *bdi)
{
return test_bit(BDI_writeback_running, &bdi->state);
}
+EXPORT_SYMBOL(writeback_in_progress);
static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
{
@@ -232,6 +228,8 @@ static void requeue_io(struct inode *inode, struct bdi_writeback *wb)
static void inode_sync_complete(struct inode *inode)
{
inode->i_state &= ~I_SYNC;
+ /* If inode is clean an unused, put it into LRU now... */
+ inode_add_lru(inode);
/* Waiters must see I_SYNC cleared before being woken up */
smp_mb();
wake_up_bit(&inode->i_state, __I_SYNC);
@@ -253,7 +251,7 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
}
/*
- * Move expired (dirtied after work->older_than_this) dirty inodes from
+ * Move expired (dirtied before work->older_than_this) dirty inodes from
* @delaying_queue to @dispatch_queue.
*/
static int move_expired_inodes(struct list_head *delaying_queue,
@@ -443,8 +441,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
* setting I_SYNC flag and calling inode_sync_complete() to clear it.
*/
static int
-__writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
- struct writeback_control *wbc)
+__writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
{
struct address_space *mapping = inode->i_mapping;
long nr_to_write = wbc->nr_to_write;
@@ -531,7 +528,7 @@ writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
inode->i_state |= I_SYNC;
spin_unlock(&inode->i_lock);
- ret = __writeback_single_inode(inode, wb, wbc);
+ ret = __writeback_single_inode(inode, wbc);
spin_lock(&wb->list_lock);
spin_lock(&inode->i_lock);
@@ -582,10 +579,6 @@ static long writeback_chunk_size(struct backing_dev_info *bdi,
/*
* Write a portion of b_io inodes which belong to @sb.
*
- * If @only_this_sb is true, then find and write all such
- * inodes. Otherwise write only ones which go sequentially
- * in reverse order.
- *
* Return the number of pages and/or inodes written.
*/
static long writeback_sb_inodes(struct super_block *sb,
@@ -628,8 +621,8 @@ static long writeback_sb_inodes(struct super_block *sb,
}
/*
- * Don't bother with new inodes or inodes beeing freed, first
- * kind does not need peridic writeout yet, and for the latter
+ * Don't bother with new inodes or inodes being freed, first
+ * kind does not need periodic writeout yet, and for the latter
* kind writeout is handled by the freer.
*/
spin_lock(&inode->i_lock);
@@ -678,7 +671,7 @@ static long writeback_sb_inodes(struct super_block *sb,
* We use I_SYNC to pin the inode in memory. While it is set
* evict_inode() will wait so the inode cannot be freed.
*/
- __writeback_single_inode(inode, wb, &wbc);
+ __writeback_single_inode(inode, &wbc);
work->nr_pages -= write_chunk - wbc.nr_to_write;
wrote += write_chunk - wbc.nr_to_write;
@@ -1041,7 +1034,7 @@ int bdi_writeback_thread(void *data)
while (!kthread_freezable_should_stop(NULL)) {
/*
* Remove own delayed wake-up timer, since we are already awake
- * and we'll take care of the preriodic write-back.
+ * and we'll take care of the periodic write-back.
*/
del_timer(&wb->wakeup_timer);
@@ -1315,6 +1308,8 @@ void writeback_inodes_sb_nr(struct super_block *sb,
.reason = reason,
};
+ if (sb->s_bdi == &noop_backing_dev_info)
+ return;
WARN_ON(!rwsem_is_locked(&sb->s_umount));
bdi_queue_work(sb->s_bdi, &work);
wait_for_completion(&done);
@@ -1398,6 +1393,9 @@ void sync_inodes_sb(struct super_block *sb)
.reason = WB_REASON_SYNC,
};
+ /* Nothing to do? */
+ if (sb->s_bdi == &noop_backing_dev_info)
+ return;
WARN_ON(!rwsem_is_locked(&sb->s_umount));
bdi_queue_work(sb->s_bdi, &work);