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Btrfs: make ordered extent be flushed by multi-task 

Though the process of the ordered extents is a bit different with the delalloc inode
flush, but we can see it as a subset of the delalloc inode flush, so we also handle
them by flush workers.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Miao Xie 2012-10-25 09:41:36 +00:00 committed by Josef Bacik
parent 25287e0a16
commit 9afab8820b
2 changed files with 37 additions and 9 deletions
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41
fs/btrfs/ordered-data.c
View File

@ -211,6 +211,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
init_waitqueue_head(&entry->wait);
INIT_LIST_HEAD(&entry->list);
INIT_LIST_HEAD(&entry->root_extent_list);
INIT_LIST_HEAD(&entry->work_list);
init_completion(&entry->completion);
trace_btrfs_ordered_extent_add(inode, entry);
@ -464,18 +466,28 @@ void btrfs_remove_ordered_extent(struct inode *inode,
wake_up(&entry->wait);
}
static void btrfs_run_ordered_extent_work(struct btrfs_work *work)
{
struct btrfs_ordered_extent *ordered;
ordered = container_of(work, struct btrfs_ordered_extent, flush_work);
btrfs_start_ordered_extent(ordered->inode, ordered, 1);
complete(&ordered->completion);
}
/*
* wait for all the ordered extents in a root. This is done when balancing
* space between drives.
*/
void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
{
struct list_head splice;
struct list_head splice, works;
struct list_head *cur;
struct btrfs_ordered_extent *ordered;
struct btrfs_ordered_extent *ordered, *next;
struct inode *inode;
INIT_LIST_HEAD(&splice);
INIT_LIST_HEAD(&works);
spin_lock(&root->fs_info->ordered_extent_lock);
list_splice_init(&root->fs_info->ordered_extents, &splice);
@ -494,19 +506,32 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
spin_unlock(&root->fs_info->ordered_extent_lock);
if (inode) {
btrfs_start_ordered_extent(inode, ordered, 1);
btrfs_put_ordered_extent(ordered);
if (delay_iput)
btrfs_add_delayed_iput(inode);
else
iput(inode);
ordered->flush_work.func = btrfs_run_ordered_extent_work;
list_add_tail(&ordered->work_list, &works);
btrfs_queue_worker(&root->fs_info->flush_workers,
&ordered->flush_work);
} else {
btrfs_put_ordered_extent(ordered);
}
cond_resched();
spin_lock(&root->fs_info->ordered_extent_lock);
}
spin_unlock(&root->fs_info->ordered_extent_lock);
list_for_each_entry_safe(ordered, next, &works, work_list) {
list_del_init(&ordered->work_list);
wait_for_completion(&ordered->completion);
inode = ordered->inode;
btrfs_put_ordered_extent(ordered);
if (delay_iput)
btrfs_add_delayed_iput(inode);
else
iput(inode);
cond_resched();
}
}
/*

5
fs/btrfs/ordered-data.h
View File

@ -128,8 +128,11 @@ struct btrfs_ordered_extent {
struct list_head root_extent_list;
struct btrfs_work work;
};
struct completion completion;
struct btrfs_work flush_work;
struct list_head work_list;
};
/*
* calculates the total size you need to allocate for an ordered sum