path: root/fs/btrfs/volumes.h
diff options
authorNikolay Borisov <nborisov@suse.com>2019-03-25 14:31:22 +0200
committerDavid Sterba <dsterba@suse.com>2019-04-29 19:02:36 +0200
commitbbbf7243d62d8be73b7ef60721c127b36b2d523e (patch)
treefeffc8d55f1080c8f1e6e73c988aa6ca0137e7ff /fs/btrfs/volumes.h
parentbtrfs: Honour FITRIM range constraints during free space trim (diff)
btrfs: combine device update operations during transaction commit
We currently overload the pending_chunks list to handle updating btrfs_device->commit_bytes used. We don't actually care about the extent mapping or even the device mapping for the chunk - we just need the device, and we can end up processing it multiple times. The fs_devices->resized_list does more or less the same thing, but with the disk size. They are called consecutively during commit and have more or less the same purpose. We can combine the two lists into a single list that attaches to the transaction and contains a list of devices that need updating. Since we always add the device to a list when we change bytes_used or disk_total_size, there's no harm in copying both values at once. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
1 files changed, 3 insertions, 10 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 38ed94b77202..b9912b910d6d 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -45,6 +45,7 @@ struct btrfs_pending_bios {
struct btrfs_device {
struct list_head dev_list;
struct list_head dev_alloc_list;
+ struct list_head post_commit_list; /* chunk mutex */
struct btrfs_fs_devices *fs_devices;
struct btrfs_fs_info *fs_info;
@@ -102,18 +103,12 @@ struct btrfs_device {
* size of the device on the current transaction
* This variant is update when committing the transaction,
- * and protected by device_list_mutex
+ * and protected by chunk mutex
u64 commit_total_bytes;
/* bytes used on the current transaction */
u64 commit_bytes_used;
- /*
- * used to manage the device which is resized
- *
- * It is protected by chunk_lock.
- */
- struct list_head resized_list;
/* for sending down flush barriers */
struct bio *flush_bio;
@@ -235,7 +230,6 @@ struct btrfs_fs_devices {
struct mutex device_list_mutex;
struct list_head devices;
- struct list_head resized_devices;
/* devices not currently being allocated */
struct list_head alloc_list;
@@ -567,8 +561,7 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
const char *get_raid_name(enum btrfs_raid_types type);
-void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
-void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans);
+void btrfs_commit_device_sizes(struct btrfs_transaction *trans);
struct list_head *btrfs_get_fs_uuids(void);
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);