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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-31 17:05:37 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-31 17:05:37 -0700 |
commit | acea568fa9eaeffbf949d15b2f7c9c346e16aae3 (patch) | |
tree | 5e85297688d2b343e390bcb660930c7d4eb659fa | |
parent | c6fd4fc708306b7d7187c324ea0a889eda411ebb (diff) | |
parent | 00d80e342c0f4f1990ab69f594ee1e2348e51dd9 (diff) | |
download | lwn-acea568fa9eaeffbf949d15b2f7c9c346e16aae3.tar.gz lwn-acea568fa9eaeffbf949d15b2f7c9c346e16aae3.zip |
Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Filipe fixed up a hard to trigger ENOSPC regression from our merge
window pull, and we have a few other smaller fixes"
* 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix quick exhaustion of the system array in the superblock
btrfs: its btrfs_err() instead of btrfs_error()
btrfs: Avoid NULL pointer dereference of free_extent_buffer when read_tree_block() fail
btrfs: Fix lockdep warning of btrfs_run_delayed_iputs()
-rw-r--r-- | fs/btrfs/dev-replace.c | 2 | ||||
-rw-r--r-- | fs/btrfs/disk-io.c | 3 | ||||
-rw-r--r-- | fs/btrfs/extent-tree.c | 18 | ||||
-rw-r--r-- | fs/btrfs/transaction.c | 3 |
4 files changed, 23 insertions, 3 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 862fbc206755..564a7de17d99 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -378,7 +378,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, ret = btrfs_kobj_add_device(tgt_device->fs_devices, tgt_device); if (ret) - btrfs_error(root->fs_info, ret, "kobj add dev failed"); + btrfs_err(root->fs_info, "kobj add dev failed %d\n", ret); printk_in_rcu(KERN_INFO "BTRFS: dev_replace from %s (devid %llu) to %s started\n", diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index a9aadb2ad525..f556c3732c2c 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2842,6 +2842,7 @@ int open_ctree(struct super_block *sb, !extent_buffer_uptodate(chunk_root->node)) { printk(KERN_ERR "BTRFS: failed to read chunk root on %s\n", sb->s_id); + chunk_root->node = NULL; goto fail_tree_roots; } btrfs_set_root_node(&chunk_root->root_item, chunk_root->node); @@ -2879,7 +2880,7 @@ retry_root_backup: !extent_buffer_uptodate(tree_root->node)) { printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n", sb->s_id); - + tree_root->node = NULL; goto recovery_tree_root; } diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 171312d51799..07204bf601ed 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4227,6 +4227,24 @@ out: space_info->chunk_alloc = 0; spin_unlock(&space_info->lock); mutex_unlock(&fs_info->chunk_mutex); + /* + * When we allocate a new chunk we reserve space in the chunk block + * reserve to make sure we can COW nodes/leafs in the chunk tree or + * add new nodes/leafs to it if we end up needing to do it when + * inserting the chunk item and updating device items as part of the + * second phase of chunk allocation, performed by + * btrfs_finish_chunk_alloc(). So make sure we don't accumulate a + * large number of new block groups to create in our transaction + * handle's new_bgs list to avoid exhausting the chunk block reserve + * in extreme cases - like having a single transaction create many new + * block groups when starting to write out the free space caches of all + * the block groups that were made dirty during the lifetime of the + * transaction. + */ + if (trans->chunk_bytes_reserved >= (2 * 1024 * 1024ull)) { + btrfs_create_pending_block_groups(trans, trans->root); + btrfs_trans_release_chunk_metadata(trans); + } return ret; } diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 51e0f0d0053e..f5021fcb154e 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -2152,7 +2152,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, kmem_cache_free(btrfs_trans_handle_cachep, trans); - if (current != root->fs_info->transaction_kthread) + if (current != root->fs_info->transaction_kthread && + current != root->fs_info->cleaner_kthread) btrfs_run_delayed_iputs(root); return ret; |