diff options
Diffstat (limited to 'include/linux/writeback.h')
-rw-r--r-- | include/linux/writeback.h | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index ddb4652cb337..a378c295851f 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h | |||
@@ -39,6 +39,23 @@ enum writeback_sync_modes { | |||
39 | }; | 39 | }; |
40 | 40 | ||
41 | /* | 41 | /* |
42 | * why some writeback work was initiated | ||
43 | */ | ||
44 | enum wb_reason { | ||
45 | WB_REASON_BACKGROUND, | ||
46 | WB_REASON_TRY_TO_FREE_PAGES, | ||
47 | WB_REASON_SYNC, | ||
48 | WB_REASON_PERIODIC, | ||
49 | WB_REASON_LAPTOP_TIMER, | ||
50 | WB_REASON_FREE_MORE_MEM, | ||
51 | WB_REASON_FS_FREE_SPACE, | ||
52 | WB_REASON_FORKER_THREAD, | ||
53 | |||
54 | WB_REASON_MAX, | ||
55 | }; | ||
56 | extern const char *wb_reason_name[]; | ||
57 | |||
58 | /* | ||
42 | * A control structure which tells the writeback code what to do. These are | 59 | * A control structure which tells the writeback code what to do. These are |
43 | * always on the stack, and hence need no locking. They are always initialised | 60 | * always on the stack, and hence need no locking. They are always initialised |
44 | * in a manner such that unspecified fields are set to zero. | 61 | * in a manner such that unspecified fields are set to zero. |
@@ -69,14 +86,17 @@ struct writeback_control { | |||
69 | */ | 86 | */ |
70 | struct bdi_writeback; | 87 | struct bdi_writeback; |
71 | int inode_wait(void *); | 88 | int inode_wait(void *); |
72 | void writeback_inodes_sb(struct super_block *); | 89 | void writeback_inodes_sb(struct super_block *, enum wb_reason reason); |
73 | void writeback_inodes_sb_nr(struct super_block *, unsigned long nr); | 90 | void writeback_inodes_sb_nr(struct super_block *, unsigned long nr, |
74 | int writeback_inodes_sb_if_idle(struct super_block *); | 91 | enum wb_reason reason); |
75 | int writeback_inodes_sb_nr_if_idle(struct super_block *, unsigned long nr); | 92 | int writeback_inodes_sb_if_idle(struct super_block *, enum wb_reason reason); |
93 | int writeback_inodes_sb_nr_if_idle(struct super_block *, unsigned long nr, | ||
94 | enum wb_reason reason); | ||
76 | void sync_inodes_sb(struct super_block *); | 95 | void sync_inodes_sb(struct super_block *); |
77 | long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages); | 96 | long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages, |
97 | enum wb_reason reason); | ||
78 | long wb_do_writeback(struct bdi_writeback *wb, int force_wait); | 98 | long wb_do_writeback(struct bdi_writeback *wb, int force_wait); |
79 | void wakeup_flusher_threads(long nr_pages); | 99 | void wakeup_flusher_threads(long nr_pages, enum wb_reason reason); |
80 | 100 | ||
81 | /* writeback.h requires fs.h; it, too, is not included from here. */ | 101 | /* writeback.h requires fs.h; it, too, is not included from here. */ |
82 | static inline void wait_on_inode(struct inode *inode) | 102 | static inline void wait_on_inode(struct inode *inode) |