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Btrfs: Replace the big fs_mutex with a collection of other locks

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Extent alloctions are still protected by a large alloc_mutex.
Objectid allocations are covered by a objectid mutex
Other btree operations are protected by a lock on individual btree nodes

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-06-25 16:01:30 -04:00
parent 925baeddc5
commit a213501153
12 changed files with 101 additions and 165 deletions
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5
fs/btrfs/ctree.h
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@@ -519,9 +519,9 @@ struct btrfs_fs_info {
struct backing_dev_info bdi;
spinlock_t hash_lock;
struct mutex trans_mutex;
struct mutex fs_mutex;
struct mutex alloc_mutex;
struct mutex chunk_mutex;
struct mutex drop_mutex;
struct list_head trans_list;
struct list_head hashers;
struct list_head dead_roots;
@@ -554,7 +554,7 @@ struct btrfs_fs_info {
struct completion kobj_unregister;
int do_barriers;
int closing;
unsigned long throttles;
atomic_t throttles;
u64 total_pinned;
struct list_head dirty_cowonly_roots;
@@ -594,6 +594,7 @@ struct btrfs_root {
struct inode *inode;
struct kobject root_kobj;
struct completion kobj_unregister;
struct mutex objectid_mutex;
u64 objectid;
u64 last_trans;