From 351a51f9cbeee70918249ee7f3142cdd35fcc684 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 28 Sep 2012 16:04:19 -0400 Subject: [PATCH] Btrfs: don't commit instead of overcommitting I don't think we have the same problem that this was supposed to fix originally since we can allocate chunks in the enospc path now. This code is causing us to constantly commit the transaction as we get close to using all of our available space in our currently allocated chunks, instead of allocating another chunk and carrying on with life, which is not nice for performance. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/extent-tree.c | 34 ++++++---------------------------- 1 file changed, 6 insertions(+), 28 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 65941d736c4c..7563db782abf 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3890,7 +3890,6 @@ static int reserve_metadata_bytes(struct btrfs_root *root, int flush_state = FLUSH_DELAYED_ITEMS_NR; int ret = 0; bool flushing = false; - bool committed = false; again: ret = 0; @@ -3953,33 +3952,12 @@ again: (orig_bytes * 2); } - if (ret) { - u64 avail; - - /* - * If we have a lot of space that's pinned, don't bother doing - * the overcommit dance yet and just commit the transaction. - */ - avail = (space_info->total_bytes - space_info->bytes_used) * 8; - do_div(avail, 10); - if (space_info->bytes_pinned >= avail && flush && !committed) { - space_info->flush = 1; - flushing = true; - spin_unlock(&space_info->lock); - ret = may_commit_transaction(root, space_info, - orig_bytes, 1); - if (ret) - goto out; - committed = true; - goto again; - } - - if (can_overcommit(root, space_info, orig_bytes, flush)) { - space_info->bytes_may_use += orig_bytes; - trace_btrfs_space_reservation(root->fs_info, - "space_info", space_info->flags, orig_bytes, 1); - ret = 0; - } + if (ret && can_overcommit(root, space_info, orig_bytes, flush)) { + space_info->bytes_may_use += orig_bytes; + trace_btrfs_space_reservation(root->fs_info, "space_info", + space_info->flags, orig_bytes, + 1); + ret = 0; } /* -- 2.39.5