diff options
| -rw-r--r-- | fs/fs-writeback.c | 2 | ||||
| -rw-r--r-- | include/trace/events/writeback.h | 29 |
2 files changed, 31 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index af5f396449f1..52129267e3bd 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -667,6 +667,7 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id) isw->inodes[0] = inode; + trace_inode_switch_wbs_queue(inode->i_wb, new_wb, 1); wb_queue_isw(new_wb, isw); return; @@ -752,6 +753,7 @@ bool cleanup_offline_cgwb(struct bdi_writeback *wb) return restart; } + trace_inode_switch_wbs_queue(wb, new_wb, nr); wb_queue_isw(new_wb, isw); return restart; diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 1e23919c0da9..c08aff044e80 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -213,6 +213,35 @@ TRACE_EVENT(inode_foreign_history, ) ); +TRACE_EVENT(inode_switch_wbs_queue, + + TP_PROTO(struct bdi_writeback *old_wb, struct bdi_writeback *new_wb, + unsigned int count), + + TP_ARGS(old_wb, new_wb, count), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(ino_t, old_cgroup_ino) + __field(ino_t, new_cgroup_ino) + __field(unsigned int, count) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(old_wb->bdi), 32); + __entry->old_cgroup_ino = __trace_wb_assign_cgroup(old_wb); + __entry->new_cgroup_ino = __trace_wb_assign_cgroup(new_wb); + __entry->count = count; + ), + + TP_printk("bdi %s: old_cgroup_ino=%lu new_cgroup_ino=%lu count=%u", + __entry->name, + (unsigned long)__entry->old_cgroup_ino, + (unsigned long)__entry->new_cgroup_ino, + __entry->count + ) +); + TRACE_EVENT(inode_switch_wbs, TP_PROTO(struct inode *inode, struct bdi_writeback *old_wb, |