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Merge tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

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Pull btrfs fix from David Sterba:
 "A regression fix for a warning caused by running balance and snapshot
  creation in parallel"

* tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix setting last_trans for reloc roots
This commit is contained in:
Linus Torvalds
2020-04-17 10:00:33 -07:00
parent 5a32fe48bc aec7db3b13
commit c5304dd59b
1 changed files with 17 additions and 2 deletions
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19
fs/btrfs/relocation.c
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@@ -1527,8 +1527,7 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
int clear_rsv = 0;
int ret;
if (!rc || !rc->create_reloc_tree ||
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
if (!rc)
return 0;
/*
@@ -1538,12 +1537,28 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
if (reloc_root_is_dead(root))
return 0;
/*
* This is subtle but important. We do not do
* record_root_in_transaction for reloc roots, instead we record their
* corresponding fs root, and then here we update the last trans for the
* reloc root. This means that we have to do this for the entire life
* of the reloc root, regardless of which stage of the relocation we are
* in.
*/
if (root->reloc_root) {
reloc_root = root->reloc_root;
reloc_root->last_trans = trans->transid;
return 0;
}
/*
* We are merging reloc roots, we do not need new reloc trees. Also
* reloc trees never need their own reloc tree.
*/
if (!rc->create_reloc_tree ||
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
return 0;
if (!trans->reloc_reserved) {
rsv = trans->block_rsv;
trans->block_rsv = rc->block_rsv;