diff options
| -rw-r--r-- | fs/btrfs/ctree.c | 10 | ||||
| -rw-r--r-- | include/trace/events/btrfs.h | 24 |
2 files changed, 32 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index e8d260ecdcf6..71e7ada95477 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -2102,6 +2102,7 @@ again: p->nodes[level + 1])) { write_lock_level = level + 1; btrfs_release_path(p); + trace_btrfs_search_slot_restart(root, level, "write_lock"); goto again; } @@ -2164,8 +2165,10 @@ cow_done: p->slots[level] = slot; ret2 = setup_nodes_for_search(trans, root, p, b, level, ins_len, &write_lock_level); - if (ret2 == -EAGAIN) + if (ret2 == -EAGAIN) { + trace_btrfs_search_slot_restart(root, level, "setup_nodes"); goto again; + } if (ret2) { ret = ret2; goto done; @@ -2181,6 +2184,7 @@ cow_done: if (slot == 0 && ins_len && write_lock_level < level + 1) { write_lock_level = level + 1; btrfs_release_path(p); + trace_btrfs_search_slot_restart(root, level, "slot_zero"); goto again; } @@ -2194,8 +2198,10 @@ cow_done: } ret2 = read_block_for_search(root, p, &b, slot, key); - if (ret2 == -EAGAIN && !p->nowait) + if (ret2 == -EAGAIN && !p->nowait) { + trace_btrfs_search_slot_restart(root, level, "read_block"); goto again; + } if (ret2) { ret = ret2; goto done; diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index 0864700f76e0..8ad7a2d76c1d 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -1113,6 +1113,30 @@ TRACE_EVENT(btrfs_cow_block, __entry->cow_level) ); +TRACE_EVENT(btrfs_search_slot_restart, + + TP_PROTO(const struct btrfs_root *root, int level, + const char *reason), + + TP_ARGS(root, level, reason), + + TP_STRUCT__entry_btrfs( + __field( u64, root_objectid ) + __field( int, level ) + __string( reason, reason ) + ), + + TP_fast_assign_btrfs(root->fs_info, + __entry->root_objectid = btrfs_root_id(root); + __entry->level = level; + __assign_str(reason); + ), + + TP_printk_btrfs("root=%llu(%s) level=%d reason=%s", + show_root_type(__entry->root_objectid), + __entry->level, __get_str(reason)) +); + TRACE_EVENT(btrfs_space_reservation, TP_PROTO(const struct btrfs_fs_info *fs_info, const char *type, u64 val, |