[12/23] btrfs: add flushing states for handling data reservations
diff mbox series

Message ID 20200708140013.56994-13-josef@toxicpanda.com
State New
Headers show
Series
  • Change data reservations to use the ticketing infra
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Commit Message

Josef Bacik July 8, 2020, 2 p.m. UTC
Currently the way we do data reservations is by seeing if we have enough
space in our space_info.  If we do not and we're a normal inode we'll

1) Attempt to force a chunk allocation until we can't anymore.
2) If that fails we'll flush delalloc, then commit the transaction, then
   run the delayed iputs.

If we are a free space inode we're only allowed to force a chunk
allocation.  In order to use the normal flushing mechanism we need to
encode this into a flush state array for normal inodes.  Since both will
start with allocating chunks until the space info is full there is no
need to add this as a flush state, this will be handled specially.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/ctree.h      | 2 ++
 fs/btrfs/space-info.c | 6 ++++++
 2 files changed, 8 insertions(+)

Patch
diff mbox series

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 6f1ba19c6705..4eabad429440 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2572,6 +2572,8 @@  enum btrfs_reserve_flush_enum {
 	 */
 	BTRFS_RESERVE_FLUSH_LIMIT,
 	BTRFS_RESERVE_FLUSH_EVICT,
+	BTRFS_RESERVE_FLUSH_DATA,
+	BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
 	BTRFS_RESERVE_FLUSH_ALL,
 	BTRFS_RESERVE_FLUSH_ALL_STEAL,
 };
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c
index 3b5064a2a972..94da7b43e152 100644
--- a/fs/btrfs/space-info.c
+++ b/fs/btrfs/space-info.c
@@ -1018,6 +1018,12 @@  static const enum btrfs_flush_state evict_flush_states[] = {
 	COMMIT_TRANS,
 };
 
+static const enum btrfs_flush_state data_flush_states[] = {
+	FLUSH_DELALLOC_WAIT,
+	COMMIT_TRANS,
+	RUN_DELAYED_IPUTS,
+};
+
 static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 				struct btrfs_space_info *space_info,
 				struct reserve_ticket *ticket,