diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 5 | ||||
| -rw-r--r-- | include/linux/writeback.h | 16 |
2 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 67a42ec95065..740126d7c44e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -638,6 +638,11 @@ struct inode { struct list_head i_wb_list; /* backing dev IO list */ #ifdef CONFIG_CGROUP_WRITEBACK struct bdi_writeback *i_wb; /* the associated cgroup wb */ + + /* foreign inode detection, see wbc_detach_inode() */ + int i_wb_frn_winner; + u16 i_wb_frn_avg_time; + u16 i_wb_frn_history; #endif struct list_head i_lru; /* inode LRU list */ struct list_head i_sb_list; diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 8f964e558af5..b333c945e571 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -88,6 +88,15 @@ struct writeback_control { unsigned for_sync:1; /* sync(2) WB_SYNC_ALL writeback */ #ifdef CONFIG_CGROUP_WRITEBACK struct bdi_writeback *wb; /* wb this writeback is issued under */ + struct inode *inode; /* inode being written out */ + + /* foreign inode detection, see wbc_detach_inode() */ + int wb_id; /* current wb id */ + int wb_lcand_id; /* last foreign candidate wb id */ + int wb_tcand_id; /* this foreign candidate wb id */ + size_t wb_bytes; /* bytes written by current wb */ + size_t wb_lcand_bytes; /* bytes written by last candidate */ + size_t wb_tcand_bytes; /* bytes written by this candidate */ #endif }; @@ -187,6 +196,8 @@ void wbc_attach_and_unlock_inode(struct writeback_control *wbc, struct inode *inode) __releases(&inode->i_lock); void wbc_detach_inode(struct writeback_control *wbc); +void wbc_account_io(struct writeback_control *wbc, struct page *page, + size_t bytes); /** * inode_attach_wb - associate an inode with its wb @@ -285,6 +296,11 @@ static inline void wbc_init_bio(struct writeback_control *wbc, struct bio *bio) { } +static inline void wbc_account_io(struct writeback_control *wbc, + struct page *page, size_t bytes) +{ +} + #endif /* CONFIG_CGROUP_WRITEBACK */ /* |