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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2016-03-23 11:38:17 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-04-04 16:29:22 +0200 |
| commit | 0305bc279317a6ba261a663cc32721d78e6544cf (patch) | |
| tree | 2e9c33cdef202e9a5b4dba65e1f3ed89fa30d222 /fs | |
| parent | 264813acb1c756aebc337b16b832604a0c9aadaf (diff) | |
| download | linux-stable-0305bc279317a6ba261a663cc32721d78e6544cf.tar.gz linux-stable-0305bc279317a6ba261a663cc32721d78e6544cf.tar.bz2 linux-stable-0305bc279317a6ba261a663cc32721d78e6544cf.zip | |
btrfs: Output more info for enospc_debug mount option
As one user in mail list report reproducible balance ENOSPC error, it's
better to add more debug info for enospc_debug mount option.
Reported-by: Marc Haber <mh+linux-btrfs@zugschlus.de>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 53e12977bfd0..85074845c562 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -9386,15 +9386,23 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) u64 dev_min = 1; u64 dev_nr = 0; u64 target; + int debug; int index; int full = 0; int ret = 0; + debug = btrfs_test_opt(root, ENOSPC_DEBUG); + block_group = btrfs_lookup_block_group(root->fs_info, bytenr); /* odd, couldn't find the block group, leave it alone */ - if (!block_group) + if (!block_group) { + if (debug) + btrfs_warn(root->fs_info, + "can't find block group for bytenr %llu", + bytenr); return -1; + } min_free = btrfs_block_group_used(&block_group->item); @@ -9448,8 +9456,13 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) * this is just a balance, so if we were marked as full * we know there is no space for a new chunk */ - if (full) + if (full) { + if (debug) + btrfs_warn(root->fs_info, + "no space to alloc new chunk for block group %llu", + block_group->key.objectid); goto out; + } index = get_block_group_index(block_group); } @@ -9496,6 +9509,10 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) ret = -1; } } + if (debug && ret == -1) + btrfs_warn(root->fs_info, + "no space to allocate a new chunk for block group %llu", + block_group->key.objectid); mutex_unlock(&root->fs_info->chunk_mutex); btrfs_end_transaction(trans, root); out: |