From 9afab8820bb8b55af669b199597d6716e04d1ba8 Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Thu, 25 Oct 2012 09:41:36 +0000 Subject: [PATCH] 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 Signed-off-by: Chris Mason --- fs/btrfs/ordered-data.c | 41 +++++++++++++++++++++++++++++++++-------- fs/btrfs/ordered-data.h | 5 ++++- 2 files changed, 37 insertions(+), 9 deletions(-) diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index ab2a3c0c540f..eecc20f14cfa 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -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(); + } } /* diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index e8dcec635112..efc7c2930c17 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -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 -- 2.20.1