diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/backing-dev.h | 2 | ||||
-rw-r--r-- | include/linux/writeback.h | 10 | ||||
-rw-r--r-- | include/trace/events/btrfs.h | 6 | ||||
-rw-r--r-- | include/trace/events/ext4.h | 6 | ||||
-rw-r--r-- | include/trace/events/writeback.h | 100 |
5 files changed, 104 insertions, 20 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 96f4094b706d..47feb2c4706a 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -57,6 +57,7 @@ struct bdi_writeback { struct list_head b_dirty; /* dirty inodes */ struct list_head b_io; /* parked for writeback */ struct list_head b_more_io; /* parked for more writeback */ + spinlock_t list_lock; /* protects the b_* lists */ }; struct backing_dev_info { @@ -106,6 +107,7 @@ int bdi_writeback_thread(void *data); int bdi_has_dirty_io(struct backing_dev_info *bdi); void bdi_arm_supers_timer(void); void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi); +void bdi_lock_two(struct bdi_writeback *wb1, struct bdi_writeback *wb2); extern spinlock_t bdi_lock; extern struct list_head bdi_list; diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 17e7ccc322a5..2f1b512bd6e0 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -9,8 +9,6 @@ struct backing_dev_info; -extern spinlock_t inode_wb_list_lock; - /* * fs/fs-writeback.c */ @@ -28,12 +26,10 @@ struct writeback_control { enum writeback_sync_modes sync_mode; unsigned long *older_than_this; /* If !NULL, only write back inodes older than this */ - unsigned long wb_start; /* Time writeback_inodes_wb was - called. This is needed to avoid - extra jobs and livelock */ long nr_to_write; /* Write this many pages, and decrement this for each page written */ long pages_skipped; /* Pages which were not written */ + long inodes_written; /* # of inodes written (at least) */ /* * For a_ops->writepages(): is start or end are non-zero then this is @@ -43,13 +39,11 @@ struct writeback_control { loff_t range_start; loff_t range_end; - unsigned nonblocking:1; /* Don't get stuck on request queues */ - unsigned encountered_congestion:1; /* An output: a queue is full */ unsigned for_kupdate:1; /* A kupdate writeback */ unsigned for_background:1; /* A background writeback */ + unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */ unsigned for_reclaim:1; /* Invoked from the page allocator */ unsigned range_cyclic:1; /* range_start is cyclic */ - unsigned more_io:1; /* more io to be dispatched */ }; /* diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index 4114129f0794..b31702ac15be 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -284,7 +284,6 @@ DECLARE_EVENT_CLASS(btrfs__writepage, __field( long, pages_skipped ) __field( loff_t, range_start ) __field( loff_t, range_end ) - __field( char, nonblocking ) __field( char, for_kupdate ) __field( char, for_reclaim ) __field( char, range_cyclic ) @@ -299,7 +298,6 @@ DECLARE_EVENT_CLASS(btrfs__writepage, __entry->pages_skipped = wbc->pages_skipped; __entry->range_start = wbc->range_start; __entry->range_end = wbc->range_end; - __entry->nonblocking = wbc->nonblocking; __entry->for_kupdate = wbc->for_kupdate; __entry->for_reclaim = wbc->for_reclaim; __entry->range_cyclic = wbc->range_cyclic; @@ -310,13 +308,13 @@ DECLARE_EVENT_CLASS(btrfs__writepage, TP_printk("root = %llu(%s), ino = %lu, page_index = %lu, " "nr_to_write = %ld, pages_skipped = %ld, range_start = %llu, " - "range_end = %llu, nonblocking = %d, for_kupdate = %d, " + "range_end = %llu, for_kupdate = %d, " "for_reclaim = %d, range_cyclic = %d, writeback_index = %lu", show_root_type(__entry->root_objectid), (unsigned long)__entry->ino, __entry->index, __entry->nr_to_write, __entry->pages_skipped, __entry->range_start, __entry->range_end, - __entry->nonblocking, __entry->for_kupdate, + __entry->for_kupdate, __entry->for_reclaim, __entry->range_cyclic, (unsigned long)__entry->writeback_index) ); diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 5ce2b2f5f524..6363193a3418 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -380,7 +380,6 @@ TRACE_EVENT(ext4_da_writepages_result, __field( int, pages_written ) __field( long, pages_skipped ) __field( int, sync_mode ) - __field( char, more_io ) __field( pgoff_t, writeback_index ) ), @@ -391,16 +390,15 @@ TRACE_EVENT(ext4_da_writepages_result, __entry->pages_written = pages_written; __entry->pages_skipped = wbc->pages_skipped; __entry->sync_mode = wbc->sync_mode; - __entry->more_io = wbc->more_io; __entry->writeback_index = inode->i_mapping->writeback_index; ), TP_printk("dev %d,%d ino %lu ret %d pages_written %d pages_skipped %ld " - " more_io %d sync_mode %d writeback_index %lu", + "sync_mode %d writeback_index %lu", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, __entry->ret, __entry->pages_written, __entry->pages_skipped, - __entry->more_io, __entry->sync_mode, + __entry->sync_mode, (unsigned long) __entry->writeback_index) ); diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 4e249b927eaa..205d14919ef2 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -8,6 +8,19 @@ #include <linux/device.h> #include <linux/writeback.h> +#define show_inode_state(state) \ + __print_flags(state, "|", \ + {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \ + {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \ + {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \ + {I_NEW, "I_NEW"}, \ + {I_WILL_FREE, "I_WILL_FREE"}, \ + {I_FREEING, "I_FREEING"}, \ + {I_CLEAR, "I_CLEAR"}, \ + {I_SYNC, "I_SYNC"}, \ + {I_REFERENCED, "I_REFERENCED"} \ + ) + struct wb_writeback_work; DECLARE_EVENT_CLASS(writeback_work_class, @@ -101,7 +114,6 @@ DECLARE_EVENT_CLASS(wbc_class, __field(int, for_background) __field(int, for_reclaim) __field(int, range_cyclic) - __field(int, more_io) __field(unsigned long, older_than_this) __field(long, range_start) __field(long, range_end) @@ -116,7 +128,6 @@ DECLARE_EVENT_CLASS(wbc_class, __entry->for_background = wbc->for_background; __entry->for_reclaim = wbc->for_reclaim; __entry->range_cyclic = wbc->range_cyclic; - __entry->more_io = wbc->more_io; __entry->older_than_this = wbc->older_than_this ? *wbc->older_than_this : 0; __entry->range_start = (long)wbc->range_start; @@ -124,7 +135,7 @@ DECLARE_EVENT_CLASS(wbc_class, ), TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d " - "bgrd=%d reclm=%d cyclic=%d more=%d older=0x%lx " + "bgrd=%d reclm=%d cyclic=%d older=0x%lx " "start=0x%lx end=0x%lx", __entry->name, __entry->nr_to_write, @@ -134,7 +145,6 @@ DECLARE_EVENT_CLASS(wbc_class, __entry->for_background, __entry->for_reclaim, __entry->range_cyclic, - __entry->more_io, __entry->older_than_this, __entry->range_start, __entry->range_end) @@ -152,6 +162,31 @@ DEFINE_WBC_EVENT(wbc_balance_dirty_written); DEFINE_WBC_EVENT(wbc_balance_dirty_wait); DEFINE_WBC_EVENT(wbc_writepage); +TRACE_EVENT(writeback_queue_io, + TP_PROTO(struct bdi_writeback *wb, + unsigned long *older_than_this, + int moved), + TP_ARGS(wb, older_than_this, moved), + TP_STRUCT__entry( + __array(char, name, 32) + __field(unsigned long, older) + __field(long, age) + __field(int, moved) + ), + TP_fast_assign( + strncpy(__entry->name, dev_name(wb->bdi->dev), 32); + __entry->older = older_than_this ? *older_than_this : 0; + __entry->age = older_than_this ? + (jiffies - *older_than_this) * 1000 / HZ : -1; + __entry->moved = moved; + ), + TP_printk("bdi %s: older=%lu age=%ld enqueue=%d", + __entry->name, + __entry->older, /* older_than_this in jiffies */ + __entry->age, /* older_than_this in relative milliseconds */ + __entry->moved) +); + DECLARE_EVENT_CLASS(writeback_congest_waited_template, TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed), @@ -187,6 +222,63 @@ DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested, TP_ARGS(usec_timeout, usec_delayed) ); +DECLARE_EVENT_CLASS(writeback_single_inode_template, + + TP_PROTO(struct inode *inode, + struct writeback_control *wbc, + unsigned long nr_to_write + ), + + TP_ARGS(inode, wbc, nr_to_write), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(unsigned long, ino) + __field(unsigned long, state) + __field(unsigned long, age) + __field(unsigned long, writeback_index) + __field(long, nr_to_write) + __field(unsigned long, wrote) + ), + + TP_fast_assign( + strncpy(__entry->name, + dev_name(inode->i_mapping->backing_dev_info->dev), 32); + __entry->ino = inode->i_ino; + __entry->state = inode->i_state; + __entry->age = (jiffies - inode->dirtied_when) * + 1000 / HZ; + __entry->writeback_index = inode->i_mapping->writeback_index; + __entry->nr_to_write = nr_to_write; + __entry->wrote = nr_to_write - wbc->nr_to_write; + ), + + TP_printk("bdi %s: ino=%lu state=%s age=%lu " + "index=%lu to_write=%ld wrote=%lu", + __entry->name, + __entry->ino, + show_inode_state(__entry->state), + __entry->age, + __entry->writeback_index, + __entry->nr_to_write, + __entry->wrote + ) +); + +DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_requeue, + TP_PROTO(struct inode *inode, + struct writeback_control *wbc, + unsigned long nr_to_write), + TP_ARGS(inode, wbc, nr_to_write) +); + +DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode, + TP_PROTO(struct inode *inode, + struct writeback_control *wbc, + unsigned long nr_to_write), + TP_ARGS(inode, wbc, nr_to_write) +); + #endif /* _TRACE_WRITEBACK_H */ /* This part must be outside protection */ |