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authorJosef Bacik <jbacik@fusionio.com>2012-09-12 00:57:25 +0400
committerChris Mason <chris.mason@fusionio.com>2012-10-01 23:19:21 +0400
commitea658badc47e614e38ab4d98510488474c7e6d4b (patch)
treebab3ed9faaab577332de89c5d967a8e17b2e4c30 /fs/btrfs/transaction.h
parentbe3940c0a90265654d778394cafe2e2cec674df8 (diff)
downloadlinux-ea658badc47e614e38ab4d98510488474c7e6d4b.tar.xz
Btrfs: delay block group item insertion
So we have lots of places where we try to preallocate chunks in order to make sure we have enough space as we make our allocations. This has historically meant that we're constantly tweaking when we should allocate a new chunk, and historically we have gotten this horribly wrong so we way over allocate either metadata or data. To try and keep this from happening we are going to make it so that the block group item insertion is done out of band at the end of a transaction. This will allow us to create chunks even if we are trying to make an allocation for the extent tree. With this patch my enospc tests run faster (didn't expect this) and more efficiently use the disk space (this is what I wanted). Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
-rw-r--r--fs/btrfs/transaction.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 1b054800eca3..b6463e128048 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -68,6 +68,7 @@ struct btrfs_trans_handle {
struct btrfs_root *root;
struct seq_list delayed_ref_elem;
struct list_head qgroup_ref_list;
+ struct list_head new_bgs;
};
struct btrfs_pending_snapshot {