diff options
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ctree.h | 20 | ||||
| -rw-r--r-- | fs/btrfs/locking.c | 4 | ||||
| -rw-r--r-- | fs/btrfs/volumes.h | 2 |
3 files changed, 14 insertions, 12 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index bb6ac5b8765..8f4e152bb11 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h | |||
| @@ -143,12 +143,15 @@ static int btrfs_csum_sizes[] = { 4, 0 }; | |||
| 143 | #define BTRFS_FT_MAX 9 | 143 | #define BTRFS_FT_MAX 9 |
| 144 | 144 | ||
| 145 | /* | 145 | /* |
| 146 | * the key defines the order in the tree, and so it also defines (optimal) | 146 | * The key defines the order in the tree, and so it also defines (optimal) |
| 147 | * block layout. objectid corresonds to the inode number. The flags | 147 | * block layout. |
| 148 | * tells us things about the object, and is a kind of stream selector. | 148 | * |
| 149 | * so for a given inode, keys with flags of 1 might refer to the inode | 149 | * objectid corresponds to the inode number. |
| 150 | * data, flags of 2 may point to file data in the btree and flags == 3 | 150 | * |
| 151 | * may point to extents. | 151 | * type tells us things about the object, and is a kind of stream selector. |
| 152 | * so for a given inode, keys with type of 1 might refer to the inode data, | ||
| 153 | * type of 2 may point to file data in the btree and type == 3 may point to | ||
| 154 | * extents. | ||
| 152 | * | 155 | * |
| 153 | * offset is the starting byte offset for this key in the stream. | 156 | * offset is the starting byte offset for this key in the stream. |
| 154 | * | 157 | * |
| @@ -200,7 +203,7 @@ struct btrfs_dev_item { | |||
| 200 | 203 | ||
| 201 | /* | 204 | /* |
| 202 | * starting byte of this partition on the device, | 205 | * starting byte of this partition on the device, |
| 203 | * to allowr for stripe alignment in the future | 206 | * to allow for stripe alignment in the future |
| 204 | */ | 207 | */ |
| 205 | __le64 start_offset; | 208 | __le64 start_offset; |
| 206 | 209 | ||
| @@ -958,7 +961,6 @@ struct btrfs_root { | |||
| 958 | }; | 961 | }; |
| 959 | 962 | ||
| 960 | /* | 963 | /* |
| 961 | |||
| 962 | * inode items have the data typically returned from stat and store other | 964 | * inode items have the data typically returned from stat and store other |
| 963 | * info about object characteristics. There is one for every file and dir in | 965 | * info about object characteristics. There is one for every file and dir in |
| 964 | * the FS | 966 | * the FS |
| @@ -989,7 +991,7 @@ struct btrfs_root { | |||
| 989 | #define BTRFS_EXTENT_CSUM_KEY 128 | 991 | #define BTRFS_EXTENT_CSUM_KEY 128 |
| 990 | 992 | ||
| 991 | /* | 993 | /* |
| 992 | * root items point to tree roots. There are typically in the root | 994 | * root items point to tree roots. They are typically in the root |
| 993 | * tree used by the super block to find all the other trees | 995 | * tree used by the super block to find all the other trees |
| 994 | */ | 996 | */ |
| 995 | #define BTRFS_ROOT_ITEM_KEY 132 | 997 | #define BTRFS_ROOT_ITEM_KEY 132 |
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index a5310c0f41e..1c36e5cd8f5 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c | |||
| @@ -60,8 +60,8 @@ void btrfs_clear_lock_blocking(struct extent_buffer *eb) | |||
| 60 | 60 | ||
| 61 | /* | 61 | /* |
| 62 | * unfortunately, many of the places that currently set a lock to blocking | 62 | * unfortunately, many of the places that currently set a lock to blocking |
| 63 | * don't end up blocking for every long, and often they don't block | 63 | * don't end up blocking for very long, and often they don't block |
| 64 | * at all. For a dbench 50 run, if we don't spin one the blocking bit | 64 | * at all. For a dbench 50 run, if we don't spin on the blocking bit |
| 65 | * at all, the context switch rate can jump up to 400,000/sec or more. | 65 | * at all, the context switch rate can jump up to 400,000/sec or more. |
| 66 | * | 66 | * |
| 67 | * So, we're still stuck with this crummy spin on the blocking bit, | 67 | * So, we're still stuck with this crummy spin on the blocking bit, |
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 86c44e9ae11..2185de72ff7 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h | |||
| @@ -76,7 +76,7 @@ struct btrfs_device { | |||
| 76 | struct btrfs_fs_devices { | 76 | struct btrfs_fs_devices { |
| 77 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | 77 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 78 | 78 | ||
| 79 | /* the device with this id has the most recent coyp of the super */ | 79 | /* the device with this id has the most recent copy of the super */ |
| 80 | u64 latest_devid; | 80 | u64 latest_devid; |
| 81 | u64 latest_trans; | 81 | u64 latest_trans; |
| 82 | u64 num_devices; | 82 | u64 num_devices; |
