From 74c40f925e0d8e1ddfe5f9fc410b4c2f6c70acf5 Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Thu, 26 Dec 2013 13:07:01 +0800 Subject: [PATCH] Btrfs: remove residual code in delayed inode async helper Before applying the patch commit de3cb945db4d8eb3b046dc7a5ea89a893372750c title: Btrfs: improve the delayed inode throttling We need requeue the async work after the current work was done, it introduced a deadlock problem. So we wrote the code that this patch removes to avoid the above problem. But after applying the above patch, the deadlock problem didn't exist. So we should remove that fix code. Signed-off-by: Miao Xie Signed-off-by: Chris Mason --- fs/btrfs/delayed-inode.c | 27 --------------------------- 1 file changed, 27 deletions(-) diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 5841949..608efeb 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -1300,33 +1300,6 @@ again: trans->block_rsv = &root->fs_info->delayed_block_rsv; __btrfs_commit_inode_delayed_items(trans, path, delayed_node); - /* - * Maybe new delayed items have been inserted, so we need requeue - * the work. Besides that, we must dequeue the empty delayed nodes - * to avoid the race between delayed items balance and the worker. - * The race like this: - * Task1 Worker thread - * count == 0, needn't requeue - * also needn't insert the - * delayed node into prepare - * list again. - * add lots of delayed items - * queue the delayed node - * already in the list, - * and not in the prepare - * list, it means the delayed - * node is being dealt with - * by the worker. - * do delayed items balance - * the delayed node is being - * dealt with by the worker - * now, just wait. - * the worker goto idle. - * Task1 will sleep until the transaction is commited. - */ - mutex_lock(&delayed_node->mutex); - btrfs_dequeue_delayed_node(root->fs_info->delayed_root, delayed_node); - mutex_unlock(&delayed_node->mutex); trans->block_rsv = block_rsv; btrfs_end_transaction_dmeta(trans, root); -- 2.7.4