Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...
[~shefty/rdma-dev.git] / fs / btrfs / file.c
index 4b833972273a75218eb775cf8caf64dc1be80ed7..571ad3c13b47be3de640f4ce84253f3ce593b26d 100644 (file)
@@ -112,8 +112,6 @@ static noinline int dirty_and_release_pages(struct btrfs_trans_handle *trans,
        int err = 0;
        int i;
        struct inode *inode = fdentry(file)->d_inode;
-       struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
-       u64 hint_byte;
        u64 num_bytes;
        u64 start_pos;
        u64 end_of_last_block;
@@ -125,22 +123,6 @@ static noinline int dirty_and_release_pages(struct btrfs_trans_handle *trans,
                    root->sectorsize - 1) & ~((u64)root->sectorsize - 1);
 
        end_of_last_block = start_pos + num_bytes - 1;
-
-       lock_extent(io_tree, start_pos, end_of_last_block, GFP_NOFS);
-       trans = btrfs_join_transaction(root, 1);
-       if (!trans) {
-               err = -ENOMEM;
-               goto out_unlock;
-       }
-       btrfs_set_trans_block_group(trans, inode);
-       hint_byte = 0;
-
-       set_extent_uptodate(io_tree, start_pos, end_of_last_block, GFP_NOFS);
-
-       /* check for reserved extents on each page, we don't want
-        * to reset the delalloc bit on things that already have
-        * extents reserved.
-        */
        btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block);
        for (i = 0; i < num_pages; i++) {
                struct page *p = pages[i];
@@ -155,9 +137,6 @@ static noinline int dirty_and_release_pages(struct btrfs_trans_handle *trans,
                 * at this time.
                 */
        }
-       err = btrfs_end_transaction(trans, root);
-out_unlock:
-       unlock_extent(io_tree, start_pos, end_of_last_block, GFP_NOFS);
        return err;
 }
 
@@ -189,18 +168,18 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                if (!split2)
                        split2 = alloc_extent_map(GFP_NOFS);
 
-               spin_lock(&em_tree->lock);
+               write_lock(&em_tree->lock);
                em = lookup_extent_mapping(em_tree, start, len);
                if (!em) {
-                       spin_unlock(&em_tree->lock);
+                       write_unlock(&em_tree->lock);
                        break;
                }
                flags = em->flags;
                if (skip_pinned && test_bit(EXTENT_FLAG_PINNED, &em->flags)) {
-                       spin_unlock(&em_tree->lock);
                        if (em->start <= start &&
                            (!testend || em->start + em->len >= start + len)) {
                                free_extent_map(em);
+                               write_unlock(&em_tree->lock);
                                break;
                        }
                        if (start < em->start) {
@@ -210,6 +189,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                                start = em->start + em->len;
                        }
                        free_extent_map(em);
+                       write_unlock(&em_tree->lock);
                        continue;
                }
                compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
@@ -260,7 +240,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                        free_extent_map(split);
                        split = NULL;
                }
-               spin_unlock(&em_tree->lock);
+               write_unlock(&em_tree->lock);
 
                /* once for us */
                free_extent_map(em);
@@ -289,7 +269,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
 noinline int btrfs_drop_extents(struct btrfs_trans_handle *trans,
                       struct btrfs_root *root, struct inode *inode,
                       u64 start, u64 end, u64 locked_end,
-                      u64 inline_limit, u64 *hint_byte)
+                      u64 inline_limit, u64 *hint_byte, int drop_cache)
 {
        u64 extent_end = 0;
        u64 search_start = start;
@@ -314,7 +294,8 @@ noinline int btrfs_drop_extents(struct btrfs_trans_handle *trans,
        int ret;
 
        inline_limit = 0;
-       btrfs_drop_extent_cache(inode, start, end - 1, 0);
+       if (drop_cache)
+               btrfs_drop_extent_cache(inode, start, end - 1, 0);
 
        path = btrfs_alloc_path();
        if (!path)