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authorMiao Xie <miaox@cn.fujitsu.com>2013-05-13 13:55:12 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-05-17 21:40:26 -0400
commitd88033dbf4c23279b012725876f1e164e09644ff (patch)
tree97954bb46f3bbc62e85edd016bc25f6f9e48f89f /fs
parent5881cfc924c8143dbc3e1f343516fc6527eb8311 (diff)
Btrfs: update the global reserve if it is empty
Before applying this patch, we reserved the space for the global reserve by the minimum unit if we found it is empty, it was unreasonable and inefficient, because if the global reserve space was depleted, it implied that the size of the global reserve was too small. In this case, we shoud update the global reserve and fill it. Cc: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/extent-tree.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 54e63b273a64..42f5e6196021 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6653,12 +6653,13 @@ use_block_rsv(struct btrfs_trans_handle *trans,
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
int ret;
+ bool global_updated = false;
block_rsv = get_block_rsv(trans, root);
if (unlikely(block_rsv->size == 0))
goto try_reserve;
-
+again:
ret = block_rsv_use_bytes(block_rsv, blocksize);
if (!ret)
return block_rsv;
@@ -6666,6 +6667,12 @@ use_block_rsv(struct btrfs_trans_handle *trans,
if (block_rsv->failfast)
return ERR_PTR(ret);
+ if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {
+ global_updated = true;
+ update_global_block_rsv(root->fs_info);
+ goto again;
+ }
+
if (btrfs_test_opt(root, ENOSPC_DEBUG)) {
static DEFINE_RATELIMIT_STATE(_rs,
DEFAULT_RATELIMIT_INTERVAL * 10,