From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- include/trace/events/writeback.h | 886 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 886 insertions(+) create mode 100644 include/trace/events/writeback.h (limited to 'include/trace/events/writeback.h') diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h new file mode 100644 index 000000000..13ee076cc --- /dev/null +++ b/include/trace/events/writeback.h @@ -0,0 +1,886 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM writeback + +#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_WRITEBACK_H + +#include +#include +#include + +#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_DIRTY_TIME, "I_DIRTY_TIME"}, \ + {I_REFERENCED, "I_REFERENCED"}, \ + {I_LINKABLE, "I_LINKABLE"}, \ + {I_WB_SWITCH, "I_WB_SWITCH"}, \ + {I_OVL_INUSE, "I_OVL_INUSE"}, \ + {I_CREATING, "I_CREATING"}, \ + {I_DONTCACHE, "I_DONTCACHE"}, \ + {I_SYNC_QUEUED, "I_SYNC_QUEUED"}, \ + {I_PINNING_NETFS_WB, "I_PINNING_NETFS_WB"}, \ + {I_LRU_ISOLATING, "I_LRU_ISOLATING"} \ + ) + +/* enums need to be exported to user space */ +#undef EM +#undef EMe +#define EM(a,b) TRACE_DEFINE_ENUM(a); +#define EMe(a,b) TRACE_DEFINE_ENUM(a); + +#define WB_WORK_REASON \ + EM( WB_REASON_BACKGROUND, "background") \ + EM( WB_REASON_VMSCAN, "vmscan") \ + EM( WB_REASON_SYNC, "sync") \ + EM( WB_REASON_PERIODIC, "periodic") \ + EM( WB_REASON_FS_FREE_SPACE, "fs_free_space") \ + EM( WB_REASON_FORKER_THREAD, "forker_thread") \ + EM( WB_REASON_FOREIGN_FLUSH, "foreign_flush") \ + EMe(WB_REASON_DONTCACHE, "dontcache") + +WB_WORK_REASON + +/* + * Now redefine the EM() and EMe() macros to map the enums to the strings + * that will be printed in the output. + */ +#undef EM +#undef EMe +#define EM(a,b) { a, b }, +#define EMe(a,b) { a, b } + +struct wb_writeback_work; + +DECLARE_EVENT_CLASS(writeback_folio_template, + + TP_PROTO(struct folio *folio, struct address_space *mapping), + + TP_ARGS(folio, mapping), + + TP_STRUCT__entry ( + __array(char, name, 32) + __field(u64, ino) + __field(pgoff_t, index) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, + bdi_dev_name(mapping ? inode_to_bdi(mapping->host) : + NULL), 32); + __entry->ino = (mapping && mapping->host) ? mapping->host->i_ino : 0; + __entry->index = folio->index; + ), + + TP_printk("bdi %s: ino=%llu index=%lu", + __entry->name, + __entry->ino, + __entry->index + ) +); + +DEFINE_EVENT(writeback_folio_template, writeback_dirty_folio, + + TP_PROTO(struct folio *folio, struct address_space *mapping), + + TP_ARGS(folio, mapping) +); + +DEFINE_EVENT(writeback_folio_template, folio_wait_writeback, + + TP_PROTO(struct folio *folio, struct address_space *mapping), + + TP_ARGS(folio, mapping) +); + +DECLARE_EVENT_CLASS(writeback_dirty_inode_template, + + TP_PROTO(struct inode *inode, int flags), + + TP_ARGS(inode, flags), + + TP_STRUCT__entry ( + __array(char, name, 32) + __field(u64, ino) + __field(unsigned long, state) + __field(unsigned long, flags) + ), + + TP_fast_assign( + struct backing_dev_info *bdi = inode_to_bdi(inode); + + /* may be called for files on pseudo FSes w/ unregistered bdi */ + strscpy_pad(__entry->name, bdi_dev_name(bdi), 32); + __entry->ino = inode->i_ino; + __entry->state = inode_state_read_once(inode); + __entry->flags = flags; + ), + + TP_printk("bdi %s: ino=%llu state=%s flags=%s", + __entry->name, + __entry->ino, + show_inode_state(__entry->state), + show_inode_state(__entry->flags) + ) +); + +DEFINE_EVENT(writeback_dirty_inode_template, writeback_mark_inode_dirty, + + TP_PROTO(struct inode *inode, int flags), + + TP_ARGS(inode, flags) +); + +DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode_start, + + TP_PROTO(struct inode *inode, int flags), + + TP_ARGS(inode, flags) +); + +DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode, + + TP_PROTO(struct inode *inode, int flags), + + TP_ARGS(inode, flags) +); + +#ifdef CREATE_TRACE_POINTS +#ifdef CONFIG_CGROUP_WRITEBACK + +static inline u64 __trace_wb_assign_cgroup(struct bdi_writeback *wb) +{ + return cgroup_ino(wb->memcg_css->cgroup); +} + +static inline u64 __trace_wbc_assign_cgroup(struct writeback_control *wbc) +{ + if (wbc->wb) + return __trace_wb_assign_cgroup(wbc->wb); + else + return 1; +} +#else /* CONFIG_CGROUP_WRITEBACK */ + +static inline u64 __trace_wb_assign_cgroup(struct bdi_writeback *wb) +{ + return 1; +} + +static inline u64 __trace_wbc_assign_cgroup(struct writeback_control *wbc) +{ + return 1; +} + +#endif /* CONFIG_CGROUP_WRITEBACK */ +#endif /* CREATE_TRACE_POINTS */ + +#ifdef CONFIG_CGROUP_WRITEBACK +TRACE_EVENT(inode_foreign_history, + + TP_PROTO(struct inode *inode, struct writeback_control *wbc, + unsigned int history), + + TP_ARGS(inode, wbc, history), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, ino) + __field(u64, cgroup_ino) + __field(unsigned int, history) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(inode_to_bdi(inode)), 32); + __entry->ino = inode->i_ino; + __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc); + __entry->history = history; + ), + + TP_printk("bdi %s: ino=%llu cgroup_ino=%llu history=0x%x", + __entry->name, + __entry->ino, + __entry->cgroup_ino, + __entry->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(u64, old_cgroup_ino) + __field(u64, 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=%llu new_cgroup_ino=%llu count=%u", + __entry->name, + __entry->old_cgroup_ino, + __entry->new_cgroup_ino, + __entry->count + ) +); + +TRACE_EVENT(inode_switch_wbs, + + TP_PROTO(struct inode *inode, struct bdi_writeback *old_wb, + struct bdi_writeback *new_wb), + + TP_ARGS(inode, old_wb, new_wb), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, ino) + __field(u64, old_cgroup_ino) + __field(u64, new_cgroup_ino) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(old_wb->bdi), 32); + __entry->ino = inode->i_ino; + __entry->old_cgroup_ino = __trace_wb_assign_cgroup(old_wb); + __entry->new_cgroup_ino = __trace_wb_assign_cgroup(new_wb); + ), + + TP_printk("bdi %s: ino=%llu old_cgroup_ino=%llu new_cgroup_ino=%llu", + __entry->name, + __entry->ino, + __entry->old_cgroup_ino, + __entry->new_cgroup_ino + ) +); + +TRACE_EVENT(track_foreign_dirty, + + TP_PROTO(struct folio *folio, struct bdi_writeback *wb), + + TP_ARGS(folio, wb), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, bdi_id) + __field(u64, ino) + __field(u64, cgroup_ino) + __field(u64, page_cgroup_ino) + __field(unsigned int, memcg_id) + ), + + TP_fast_assign( + struct address_space *mapping = folio_mapping(folio); + struct inode *inode = mapping ? mapping->host : NULL; + + strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32); + __entry->bdi_id = wb->bdi->id; + __entry->ino = inode ? inode->i_ino : 0; + __entry->memcg_id = wb->memcg_css->id; + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + + rcu_read_lock(); + __entry->page_cgroup_ino = cgroup_ino(folio_memcg(folio)->css.cgroup); + rcu_read_unlock(); + ), + + TP_printk("bdi %s[%llu]: ino=%llu memcg_id=%u cgroup_ino=%llu page_cgroup_ino=%llu", + __entry->name, + __entry->bdi_id, + __entry->ino, + __entry->memcg_id, + __entry->cgroup_ino, + __entry->page_cgroup_ino + ) +); + +TRACE_EVENT(flush_foreign, + + TP_PROTO(struct bdi_writeback *wb, unsigned int frn_bdi_id, + unsigned int frn_memcg_id), + + TP_ARGS(wb, frn_bdi_id, frn_memcg_id), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, cgroup_ino) + __field(unsigned int, frn_bdi_id) + __field(unsigned int, frn_memcg_id) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32); + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + __entry->frn_bdi_id = frn_bdi_id; + __entry->frn_memcg_id = frn_memcg_id; + ), + + TP_printk("bdi %s: cgroup_ino=%llu frn_bdi_id=%u frn_memcg_id=%u", + __entry->name, + __entry->cgroup_ino, + __entry->frn_bdi_id, + __entry->frn_memcg_id + ) +); +#endif + +DECLARE_EVENT_CLASS(writeback_write_inode_template, + + TP_PROTO(struct inode *inode, struct writeback_control *wbc), + + TP_ARGS(inode, wbc), + + TP_STRUCT__entry ( + __array(char, name, 32) + __field(u64, ino) + __field(u64, cgroup_ino) + __field(int, sync_mode) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, + bdi_dev_name(inode_to_bdi(inode)), 32); + __entry->ino = inode->i_ino; + __entry->sync_mode = wbc->sync_mode; + __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc); + ), + + TP_printk("bdi %s: ino=%llu sync_mode=%d cgroup_ino=%llu", + __entry->name, + __entry->ino, + __entry->sync_mode, + __entry->cgroup_ino + ) +); + +DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode_start, + + TP_PROTO(struct inode *inode, struct writeback_control *wbc), + + TP_ARGS(inode, wbc) +); + +DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode, + + TP_PROTO(struct inode *inode, struct writeback_control *wbc), + + TP_ARGS(inode, wbc) +); + +DECLARE_EVENT_CLASS(writeback_work_class, + TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work), + TP_ARGS(wb, work), + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, cgroup_ino) + __field(long, nr_pages) + __field(dev_t, sb_dev) + __field(int, sync_mode) + __field(int, for_kupdate) + __field(int, range_cyclic) + __field(int, for_background) + __field(int, reason) + ), + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32); + __entry->nr_pages = work->nr_pages; + __entry->sb_dev = work->sb ? work->sb->s_dev : 0; + __entry->sync_mode = work->sync_mode; + __entry->for_kupdate = work->for_kupdate; + __entry->range_cyclic = work->range_cyclic; + __entry->for_background = work->for_background; + __entry->reason = work->reason; + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + ), + TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d " + "kupdate=%d range_cyclic=%d background=%d reason=%s cgroup_ino=%llu", + __entry->name, + MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev), + __entry->nr_pages, + __entry->sync_mode, + __entry->for_kupdate, + __entry->range_cyclic, + __entry->for_background, + __print_symbolic(__entry->reason, WB_WORK_REASON), + __entry->cgroup_ino + ) +); +#define DEFINE_WRITEBACK_WORK_EVENT(name) \ +DEFINE_EVENT(writeback_work_class, name, \ + TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work), \ + TP_ARGS(wb, work)) +DEFINE_WRITEBACK_WORK_EVENT(writeback_queue); +DEFINE_WRITEBACK_WORK_EVENT(writeback_exec); +DEFINE_WRITEBACK_WORK_EVENT(writeback_start); +DEFINE_WRITEBACK_WORK_EVENT(writeback_written); +DEFINE_WRITEBACK_WORK_EVENT(writeback_wait); + +TRACE_EVENT(writeback_pages_written, + TP_PROTO(long pages_written), + TP_ARGS(pages_written), + TP_STRUCT__entry( + __field(long, pages) + ), + TP_fast_assign( + __entry->pages = pages_written; + ), + TP_printk("%ld", __entry->pages) +); + +DECLARE_EVENT_CLASS(writeback_class, + TP_PROTO(struct bdi_writeback *wb), + TP_ARGS(wb), + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, cgroup_ino) + ), + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32); + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + ), + TP_printk("bdi %s: cgroup_ino=%llu", + __entry->name, + __entry->cgroup_ino + ) +); +#define DEFINE_WRITEBACK_EVENT(name) \ +DEFINE_EVENT(writeback_class, name, \ + TP_PROTO(struct bdi_writeback *wb), \ + TP_ARGS(wb)) + +DEFINE_WRITEBACK_EVENT(writeback_wake_background); + +TRACE_EVENT(writeback_bdi_register, + TP_PROTO(struct backing_dev_info *bdi), + TP_ARGS(bdi), + TP_STRUCT__entry( + __array(char, name, 32) + ), + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(bdi), 32); + ), + TP_printk("bdi %s", + __entry->name + ) +); + +DECLARE_EVENT_CLASS(wbc_class, + TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), + TP_ARGS(wbc, bdi), + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, cgroup_ino) + __field(long, nr_to_write) + __field(long, pages_skipped) + __field(long, range_start) + __field(long, range_end) + __field(int, sync_mode) + __field(int, for_kupdate) + __field(int, for_background) + __field(int, range_cyclic) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(bdi), 32); + __entry->nr_to_write = wbc->nr_to_write; + __entry->pages_skipped = wbc->pages_skipped; + __entry->sync_mode = wbc->sync_mode; + __entry->for_kupdate = wbc->for_kupdate; + __entry->for_background = wbc->for_background; + __entry->range_cyclic = wbc->range_cyclic; + __entry->range_start = (long)wbc->range_start; + __entry->range_end = (long)wbc->range_end; + __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc); + ), + + TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d bgrd=%d " + "cyclic=%d start=0x%lx end=0x%lx cgroup_ino=%llu", + __entry->name, + __entry->nr_to_write, + __entry->pages_skipped, + __entry->sync_mode, + __entry->for_kupdate, + __entry->for_background, + __entry->range_cyclic, + __entry->range_start, + __entry->range_end, + __entry->cgroup_ino + ) +) + +#define DEFINE_WBC_EVENT(name) \ +DEFINE_EVENT(wbc_class, name, \ + TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \ + TP_ARGS(wbc, bdi)) +DEFINE_WBC_EVENT(wbc_writepage); + +TRACE_EVENT(writeback_queue_io, + TP_PROTO(struct bdi_writeback *wb, + struct wb_writeback_work *work, + unsigned long dirtied_before, + int moved), + TP_ARGS(wb, work, dirtied_before, moved), + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, cgroup_ino) + __field(unsigned long, older) + __field(long, age) + __field(int, moved) + __field(int, reason) + ), + TP_fast_assign( + strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32); + __entry->older = dirtied_before; + __entry->age = (jiffies - dirtied_before) * 1000 / HZ; + __entry->moved = moved; + __entry->reason = work->reason; + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + ), + TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%llu", + __entry->name, + __entry->older, /* dirtied_before in jiffies */ + __entry->age, /* dirtied_before in relative milliseconds */ + __entry->moved, + __print_symbolic(__entry->reason, WB_WORK_REASON), + __entry->cgroup_ino + ) +); + +TRACE_EVENT(global_dirty_state, + + TP_PROTO(unsigned long background_thresh, + unsigned long dirty_thresh + ), + + TP_ARGS(background_thresh, + dirty_thresh + ), + + TP_STRUCT__entry( + __field(unsigned long, nr_dirty) + __field(unsigned long, nr_writeback) + __field(unsigned long, background_thresh) + __field(unsigned long, dirty_thresh) + __field(unsigned long, dirty_limit) + __field(unsigned long, nr_dirtied) + __field(unsigned long, nr_written) + ), + + TP_fast_assign( + __entry->nr_dirty = global_node_page_state(NR_FILE_DIRTY); + __entry->nr_writeback = global_node_page_state(NR_WRITEBACK); + __entry->nr_dirtied = global_node_page_state(NR_DIRTIED); + __entry->nr_written = global_node_page_state(NR_WRITTEN); + __entry->background_thresh = background_thresh; + __entry->dirty_thresh = dirty_thresh; + __entry->dirty_limit = global_wb_domain.dirty_limit; + ), + + TP_printk("dirty=%lu writeback=%lu " + "bg_thresh=%lu thresh=%lu limit=%lu " + "dirtied=%lu written=%lu", + __entry->nr_dirty, + __entry->nr_writeback, + __entry->background_thresh, + __entry->dirty_thresh, + __entry->dirty_limit, + __entry->nr_dirtied, + __entry->nr_written + ) +); + +#define KBps(x) ((x) << (PAGE_SHIFT - 10)) + +TRACE_EVENT(bdi_dirty_ratelimit, + + TP_PROTO(struct bdi_writeback *wb, + unsigned long dirty_rate, + unsigned long task_ratelimit), + + TP_ARGS(wb, dirty_rate, task_ratelimit), + + TP_STRUCT__entry( + __array(char, bdi, 32) + __field(u64, cgroup_ino) + __field(unsigned long, write_bw) + __field(unsigned long, avg_write_bw) + __field(unsigned long, dirty_rate) + __field(unsigned long, dirty_ratelimit) + __field(unsigned long, task_ratelimit) + __field(unsigned long, balanced_dirty_ratelimit) + ), + + TP_fast_assign( + strscpy_pad(__entry->bdi, bdi_dev_name(wb->bdi), 32); + __entry->write_bw = KBps(wb->write_bandwidth); + __entry->avg_write_bw = KBps(wb->avg_write_bandwidth); + __entry->dirty_rate = KBps(dirty_rate); + __entry->dirty_ratelimit = KBps(wb->dirty_ratelimit); + __entry->task_ratelimit = KBps(task_ratelimit); + __entry->balanced_dirty_ratelimit = + KBps(wb->balanced_dirty_ratelimit); + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + ), + + TP_printk("bdi %s: " + "write_bw=%lu awrite_bw=%lu dirty_rate=%lu " + "dirty_ratelimit=%lu task_ratelimit=%lu " + "balanced_dirty_ratelimit=%lu cgroup_ino=%llu", + __entry->bdi, + __entry->write_bw, /* write bandwidth */ + __entry->avg_write_bw, /* avg write bandwidth */ + __entry->dirty_rate, /* bdi dirty rate */ + __entry->dirty_ratelimit, /* base ratelimit */ + __entry->task_ratelimit, /* ratelimit with position control */ + __entry->balanced_dirty_ratelimit, /* the balanced ratelimit */ + __entry->cgroup_ino + ) +); + +TRACE_EVENT(balance_dirty_pages, + + TP_PROTO(struct bdi_writeback *wb, + struct dirty_throttle_control *dtc, + unsigned long dirty_ratelimit, + unsigned long task_ratelimit, + unsigned long dirtied, + unsigned long period, + long pause, + unsigned long start_time), + + TP_ARGS(wb, dtc, + dirty_ratelimit, task_ratelimit, + dirtied, period, pause, start_time), + + TP_STRUCT__entry( + __array( char, bdi, 32) + __field(u64, cgroup_ino) + __field(unsigned long, limit) + __field(unsigned long, setpoint) + __field(unsigned long, dirty) + __field(unsigned long, wb_setpoint) + __field(unsigned long, wb_dirty) + __field(unsigned long, dirty_ratelimit) + __field(unsigned long, task_ratelimit) + __field(unsigned long, paused) + __field( long, pause) + __field(unsigned long, period) + __field( long, think) + __field(unsigned int, dirtied) + __field(unsigned int, dirtied_pause) + ), + + TP_fast_assign( + unsigned long freerun = (dtc->thresh + dtc->bg_thresh) / 2; + strscpy_pad(__entry->bdi, bdi_dev_name(wb->bdi), 32); + + __entry->limit = dtc->limit; + __entry->setpoint = (dtc->limit + freerun) / 2; + __entry->dirty = dtc->dirty; + __entry->wb_setpoint = __entry->setpoint * + dtc->wb_thresh / (dtc->thresh + 1); + __entry->wb_dirty = dtc->wb_dirty; + __entry->dirty_ratelimit = KBps(dirty_ratelimit); + __entry->task_ratelimit = KBps(task_ratelimit); + __entry->dirtied = dirtied; + __entry->dirtied_pause = current->nr_dirtied_pause; + __entry->think = current->dirty_paused_when == 0 ? 0 : + (long)(jiffies - current->dirty_paused_when) * 1000/HZ; + __entry->period = period * 1000 / HZ; + __entry->pause = pause * 1000 / HZ; + __entry->paused = (jiffies - start_time) * 1000 / HZ; + __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); + ), + + + TP_printk("bdi %s: " + "limit=%lu setpoint=%lu dirty=%lu " + "wb_setpoint=%lu wb_dirty=%lu " + "dirty_ratelimit=%lu task_ratelimit=%lu " + "dirtied=%u dirtied_pause=%u " + "paused=%lu pause=%ld period=%lu think=%ld cgroup_ino=%llu", + __entry->bdi, + __entry->limit, + __entry->setpoint, + __entry->dirty, + __entry->wb_setpoint, + __entry->wb_dirty, + __entry->dirty_ratelimit, + __entry->task_ratelimit, + __entry->dirtied, + __entry->dirtied_pause, + __entry->paused, /* ms */ + __entry->pause, /* ms */ + __entry->period, /* ms */ + __entry->think, /* ms */ + __entry->cgroup_ino + ) +); + +TRACE_EVENT(writeback_sb_inodes_requeue, + + TP_PROTO(struct inode *inode), + TP_ARGS(inode), + + TP_STRUCT__entry( + __array(char, name, 32) + __field(u64, ino) + __field(u64, cgroup_ino) + __field(unsigned long, state) + __field(unsigned long, dirtied_when) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, + bdi_dev_name(inode_to_bdi(inode)), 32); + __entry->ino = inode->i_ino; + __entry->state = inode_state_read_once(inode); + __entry->dirtied_when = inode->dirtied_when; + __entry->cgroup_ino = __trace_wb_assign_cgroup(inode_to_wb(inode)); + ), + + TP_printk("bdi %s: ino=%llu state=%s dirtied_when=%lu age=%lu cgroup_ino=%llu", + __entry->name, + __entry->ino, + show_inode_state(__entry->state), + __entry->dirtied_when, + (jiffies - __entry->dirtied_when) / HZ, + __entry->cgroup_ino + ) +); + +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(u64, ino) + __field(u64, cgroup_ino) + __field(unsigned long, state) + __field(unsigned long, dirtied_when) + __field(unsigned long, writeback_index) + __field(unsigned long, wrote) + __field(long, nr_to_write) + ), + + TP_fast_assign( + strscpy_pad(__entry->name, + bdi_dev_name(inode_to_bdi(inode)), 32); + __entry->ino = inode->i_ino; + __entry->state = inode_state_read_once(inode); + __entry->dirtied_when = inode->dirtied_when; + __entry->writeback_index = inode->i_mapping->writeback_index; + __entry->nr_to_write = nr_to_write; + __entry->wrote = nr_to_write - wbc->nr_to_write; + __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc); + ), + + TP_printk("bdi %s: ino=%llu state=%s dirtied_when=%lu age=%lu " + "index=%lu to_write=%ld wrote=%lu cgroup_ino=%llu", + __entry->name, + __entry->ino, + show_inode_state(__entry->state), + __entry->dirtied_when, + (jiffies - __entry->dirtied_when) / HZ, + __entry->writeback_index, + __entry->nr_to_write, + __entry->wrote, + __entry->cgroup_ino + ) +); + +DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_start, + 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) +); + +DECLARE_EVENT_CLASS(writeback_inode_template, + TP_PROTO(struct inode *inode), + + TP_ARGS(inode), + + TP_STRUCT__entry( + __field( u64, ino ) + __field(unsigned long, state ) + __field(unsigned long, dirtied_when ) + __field( dev_t, dev ) + __field( __u16, mode ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->state = inode_state_read_once(inode); + __entry->mode = inode->i_mode; + __entry->dirtied_when = inode->dirtied_when; + ), + + TP_printk("dev %d,%d ino %llu dirtied %lu state %s mode 0%o", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, __entry->dirtied_when, + show_inode_state(__entry->state), __entry->mode) +); + +DEFINE_EVENT(writeback_inode_template, writeback_lazytime, + TP_PROTO(struct inode *inode), + + TP_ARGS(inode) +); + +DEFINE_EVENT(writeback_inode_template, writeback_dirty_inode_enqueue, + + TP_PROTO(struct inode *inode), + + TP_ARGS(inode) +); + +/* + * Inode writeback list tracking. + */ + +DEFINE_EVENT(writeback_inode_template, sb_mark_inode_writeback, + TP_PROTO(struct inode *inode), + TP_ARGS(inode) +); + +DEFINE_EVENT(writeback_inode_template, sb_clear_inode_writeback, + TP_PROTO(struct inode *inode), + TP_ARGS(inode) +); + +#endif /* _TRACE_WRITEBACK_H */ + +/* This part must be outside protection */ +#include -- cgit v1.3.1