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authorMiao Xie <miaox@cn.fujitsu.com>2012-10-16 11:33:38 +0000
committerJosef Bacik <jbacik@fusionio.com>2012-12-11 13:31:31 -0500
commit08e007d2e57744472a9424735a368ffe6d625597 (patch)
tree84227c096c05bc4c5430190f0f550b094d3bf2b7 /fs/btrfs/relocation.c
parent561c294d4cfb30c4acfa0a243448fc55af730d87 (diff)
downloadlinux-08e007d2e57744472a9424735a368ffe6d625597.tar.gz
Btrfs: improve the noflush reservation
In some places(such as: evicting inode), we just can not flush the reserved space of delalloc, flushing the delayed directory index and delayed inode is OK, but we don't try to flush those things and just go back when there is no enough space to be reserved. This patch fixes this problem. We defined 3 types of the flush operations: NO_FLUSH, FLUSH_LIMIT and FLUSH_ALL. If we can in the transaction, we should not flush anything, or the deadlock would happen, so use NO_FLUSH. If we flushing the reserved space of delalloc would cause deadlock, use FLUSH_LIMIT. In the other cases, FLUSH_ALL is used, and we will flush all things. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/relocation.c')
-rw-r--r--fs/btrfs/relocation.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 776f0aa128f..242d6de4d8e 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2074,7 +2074,8 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
BUG_ON(IS_ERR(trans));
trans->block_rsv = rc->block_rsv;
- ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved);
+ ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret) {
BUG_ON(ret != -EAGAIN);
ret = btrfs_commit_transaction(trans, root);
@@ -2184,7 +2185,8 @@ int prepare_to_merge(struct reloc_control *rc, int err)
again:
if (!err) {
num_bytes = rc->merging_rsv_size;
- ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret)
err = ret;
}
@@ -2459,7 +2461,8 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans,
num_bytes = calcu_metadata_size(rc, node, 1) * 2;
trans->block_rsv = rc->block_rsv;
- ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret) {
if (ret == -EAGAIN)
rc->commit_transaction = 1;
@@ -3685,7 +3688,8 @@ int prepare_to_relocate(struct reloc_control *rc)
* is no reservation in transaction handle.
*/
ret = btrfs_block_rsv_add(rc->extent_root, rc->block_rsv,
- rc->extent_root->nodesize * 256);
+ rc->extent_root->nodesize * 256,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret)
return ret;