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| author | Josef Bacik <josef@toxicpanda.com> | 2019-08-22 15:11:00 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-09-09 14:59:18 +0200 |
| commit | 00c0135eb8b8172de48e1accbb09ebfa3aa8bf25 (patch) | |
| tree | efed93f9a10b2b5e0ca67d2622b025e7a501947d /fs/btrfs | |
| parent | 2341ccd1bf05b3d844c10ad224cd38b06fd53219 (diff) | |
| download | lwn-00c0135eb8b8172de48e1accbb09ebfa3aa8bf25.tar.gz lwn-00c0135eb8b8172de48e1accbb09ebfa3aa8bf25.zip | |
btrfs: fix may_commit_transaction to deal with no partial filling
Now that we aren't partially filling tickets we may have some slack
space left in the space_info. We need to account for this in
may_commit_transaction, otherwise we may choose to not commit the
transaction despite it actually having enough space to satisfy our
ticket.
Calculate the free space we have in the space_info, if any, and subtract
this from the ticket we have and use that amount to determine if we will
need to commit to reclaim enough space.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/space-info.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index eb4a926ea7b9..3ab7a4810bef 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -473,12 +473,19 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans; u64 bytes_needed; u64 reclaim_bytes = 0; + u64 cur_free_bytes = 0; trans = (struct btrfs_trans_handle *)current->journal_info; if (trans) return -EAGAIN; spin_lock(&space_info->lock); + cur_free_bytes = btrfs_space_info_used(space_info, true); + if (cur_free_bytes < space_info->total_bytes) + cur_free_bytes = space_info->total_bytes - cur_free_bytes; + else + cur_free_bytes = 0; + if (!list_empty(&space_info->priority_tickets)) ticket = list_first_entry(&space_info->priority_tickets, struct reserve_ticket, list); @@ -486,6 +493,11 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info, ticket = list_first_entry(&space_info->tickets, struct reserve_ticket, list); bytes_needed = (ticket) ? ticket->bytes : 0; + + if (bytes_needed > cur_free_bytes) + bytes_needed -= cur_free_bytes; + else + bytes_needed = 0; spin_unlock(&space_info->lock); if (!bytes_needed) |