diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 9 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 22 | ||||
| -rw-r--r-- | include/trace/events/btrfs.h | 82 |
3 files changed, 103 insertions, 10 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2e04c9d..83a6a93 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2626,6 +2626,15 @@ enum btrfs_reserve_flush_enum { BTRFS_RESERVE_FLUSH_ALL, }; +enum btrfs_flush_state { + FLUSH_DELAYED_ITEMS_NR = 1, + FLUSH_DELAYED_ITEMS = 2, + FLUSH_DELALLOC = 3, + FLUSH_DELALLOC_WAIT = 4, + ALLOC_CHUNK = 5, + COMMIT_TRANS = 6, +}; + int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes); void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 5d24ec44..31ded6a 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4835,15 +4835,6 @@ commit: return btrfs_commit_transaction(trans, root); } -enum flush_state { - FLUSH_DELAYED_ITEMS_NR = 1, - FLUSH_DELAYED_ITEMS = 2, - FLUSH_DELALLOC = 3, - FLUSH_DELALLOC_WAIT = 4, - ALLOC_CHUNK = 5, - COMMIT_TRANS = 6, -}; - struct reserve_ticket { u64 bytes; int error; @@ -4901,6 +4892,8 @@ static int flush_space(struct btrfs_root *root, break; } + trace_btrfs_flush_space(root->fs_info, space_info->flags, num_bytes, + orig_bytes, state, ret); return ret; } @@ -5178,6 +5171,10 @@ static int __reserve_metadata_bytes(struct btrfs_root *root, list_add_tail(&ticket.list, &space_info->tickets); if (!space_info->flush) { space_info->flush = 1; + trace_btrfs_trigger_flush(root->fs_info, + space_info->flags, + orig_bytes, flush, + "enospc"); queue_work(system_unbound_wq, &root->fs_info->async_reclaim_work); } @@ -5194,9 +5191,14 @@ static int __reserve_metadata_bytes(struct btrfs_root *root, */ if (!root->fs_info->log_root_recovering && need_do_async_reclaim(space_info, root->fs_info, used) && - !work_busy(&root->fs_info->async_reclaim_work)) + !work_busy(&root->fs_info->async_reclaim_work)) { + trace_btrfs_trigger_flush(root->fs_info, + space_info->flags, + orig_bytes, flush, + "preempt"); queue_work(system_unbound_wq, &root->fs_info->async_reclaim_work); + } } spin_unlock(&space_info->lock); if (!ret || flush == BTRFS_RESERVE_NO_FLUSH) diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index 985e01b..226c7f2 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -784,6 +784,88 @@ TRACE_EVENT(btrfs_space_reservation, __entry->bytes) ); +#define show_flush_action(action) \ + __print_symbolic(action, \ + { BTRFS_RESERVE_NO_FLUSH, "BTRFS_RESERVE_NO_FLUSH"}, \ + { BTRFS_RESERVE_FLUSH_LIMIT, "BTRFS_RESERVE_FLUSH_LIMIT"}, \ + { BTRFS_RESERVE_FLUSH_ALL, "BTRFS_RESERVE_FLUSH_ALL"}) + +TRACE_EVENT(btrfs_trigger_flush, + + TP_PROTO(struct btrfs_fs_info *fs_info, u64 flags, u64 bytes, + int flush, char *reason), + + TP_ARGS(fs_info, flags, bytes, flush, reason), + + TP_STRUCT__entry( + __array( u8, fsid, BTRFS_UUID_SIZE ) + __field( u64, flags ) + __field( u64, bytes ) + __field( int, flush ) + __string( reason, reason ) + ), + + TP_fast_assign( + memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE); + __entry->flags = flags; + __entry->bytes = bytes; + __entry->flush = flush; + __assign_str(reason, reason) + ), + + TP_printk("%pU: %s: flush = %d(%s), flags = %llu(%s), bytes = %llu", + __entry->fsid, __get_str(reason), __entry->flush, + show_flush_action(__entry->flush), + (unsigned long long)__entry->flags, + __print_flags((unsigned long)__entry->flags, "|", + BTRFS_GROUP_FLAGS), + (unsigned long long)__entry->bytes) +); + +#define show_flush_state(state) \ + __print_symbolic(state, \ + { FLUSH_DELAYED_ITEMS_NR, "FLUSH_DELAYED_ITEMS_NR"}, \ + { FLUSH_DELAYED_ITEMS, "FLUSH_DELAYED_ITEMS"}, \ + { FLUSH_DELALLOC, "FLUSH_DELALLOC"}, \ + { FLUSH_DELALLOC_WAIT, "FLUSH_DELALLOC_WAIT"}, \ + { ALLOC_CHUNK, "ALLOC_CHUNK"}, \ + { COMMIT_TRANS, "COMMIT_TRANS"}) + +TRACE_EVENT(btrfs_flush_space, + + TP_PROTO(struct btrfs_fs_info *fs_info, u64 flags, u64 num_bytes, + u64 orig_bytes, int state, int ret), + + TP_ARGS(fs_info, flags, num_bytes, orig_bytes, state, ret), + + TP_STRUCT__entry( + __array( u8, fsid, BTRFS_UUID_SIZE ) + __field( u64, flags ) + __field( u64, num_bytes ) + __field( u64, orig_bytes ) + __field( int, state ) + __field( int, ret ) + ), + + TP_fast_assign( + memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE); + __entry->flags = flags; + __entry->num_bytes = num_bytes; + __entry->orig_bytes = orig_bytes; + __entry->state = state; + __entry->ret = ret; + ), + + TP_printk("%pU: state = %d(%s), flags = %llu(%s), num_bytes = %llu, " + "orig_bytes = %llu, ret = %d", __entry->fsid, __entry->state, + show_flush_state(__entry->state), + (unsigned long long)__entry->flags, + __print_flags((unsigned long)__entry->flags, "|", + BTRFS_GROUP_FLAGS), + (unsigned long long)__entry->num_bytes, + (unsigned long long)__entry->orig_bytes, __entry->ret) +); + DECLARE_EVENT_CLASS(btrfs__reserved_extent, TP_PROTO(struct btrfs_root *root, u64 start, u64 len), |
