From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josef Bacik Subject: [PATCH] Btrfs: only retry transaction reservation once Date: Tue, 5 Apr 2011 11:57:27 -0400 Message-ID: <1302019047-16939-1-git-send-email-josef@redhat.com> To: linux-btrfs@vger.kernel.org Return-path: List-ID: I saw a lockup where we kept getting into this start transaction->commit transaction loop because of enospce. The fact is if we fail to make our reservation, we've tried _everything_ several times, so we only need to try and commit the transaction once, and if that doesn't work then we really are out of space and need to just exit. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/transaction.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 3d73c8d..6b0ba18 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -180,6 +180,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; + int retries = 0; int ret; if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) @@ -218,10 +219,18 @@ again: if (num_items > 0) { ret = btrfs_trans_reserve_metadata(h, root, num_items); - if (ret == -EAGAIN) { + if (ret == -EAGAIN && !retries) { + retries++; btrfs_commit_transaction(h, root); goto again; + } else if (ret == -EAGAIN) { + /* + * We have already retried and got EAGAIN, so really we + * don't have space, so set ret to -ENOSPC. + */ + ret = -ENOSPC; } + if (ret < 0) { btrfs_end_transaction(h, root); return ERR_PTR(ret); -- 1.7.2.3