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kernel-ark/include/trace/events/writeback.h
Yang Shi a664edb374 tracing, writeback: Replace cgroup path to cgroup ino 
commit 5634cc2aa9 ("writeback: update writeback
tracepoints to report cgroup") made writeback tracepoints print out cgroup
path when CGROUP_WRITEBACK is enabled, but it may trigger the below bug on -rt
kernel since kernfs_path and kernfs_path_len are called by tracepoints, which
acquire spin lock that is sleepable on -rt kernel.

BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:930
in_atomic(): 1, irqs_disabled(): 0, pid: 625, name: kworker/u16:3
INFO: lockdep is turned off.
Preemption disabled at:[<ffffffc000374a5c>] wb_writeback+0xec/0x830

CPU: 7 PID: 625 Comm: kworker/u16:3 Not tainted 4.4.1-rt5 #20
Hardware name: Freescale Layerscape 2085a RDB Board (DT)
Workqueue: writeback wb_workfn (flush-7:0)
Call trace:
[<ffffffc00008d708>] dump_backtrace+0x0/0x200
[<ffffffc00008d92c>] show_stack+0x24/0x30
[<ffffffc0007b0f40>] dump_stack+0x88/0xa8
[<ffffffc000127d74>] ___might_sleep+0x2ec/0x300
[<ffffffc000d5d550>] rt_spin_lock+0x38/0xb8
[<ffffffc0003e0548>] kernfs_path_len+0x30/0x90
[<ffffffc00036b360>] trace_event_raw_event_writeback_work_class+0xe8/0x2e8
[<ffffffc000374f90>] wb_writeback+0x620/0x830
[<ffffffc000376224>] wb_workfn+0x61c/0x950
[<ffffffc000110adc>] process_one_work+0x3ac/0xb30
[<ffffffc0001112fc>] worker_thread+0x9c/0x7a8
[<ffffffc00011a9e8>] kthread+0x190/0x1b0
[<ffffffc000086ca0>] ret_from_fork+0x10/0x30

With unlocked kernfs_* functions, synchronize_sched() has to be called in
kernfs_rename which could be called in syscall path, but it is problematic.
So, print out cgroup ino instead of path name, which could be converted to
path name by userland.

Withouth CGROUP_WRITEBACK enabled, it just prints out root dir. But, root
dir ino vary from different filesystems, so printing out -1U to indicate
an invalid cgroup ino.

Link: http://lkml.kernel.org/r/1456996137-8354-1-git-send-email-yang.shi@linaro.org

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-03-08 11:19:37 -05:00

749 lines
20 KiB
C
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#undef TRACE_SYSTEM
#define TRACE_SYSTEM writeback
#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_WRITEBACK_H
#include <linux/tracepoint.h>
#include <linux/backing-dev.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_DIRTY_TIME, "I_DIRTY_TIME"}, \
{I_DIRTY_TIME_EXPIRED, "I_DIRTY_TIME_EXPIRED"}, \
{I_REFERENCED, "I_REFERENCED"} \
)
/* 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_TRY_TO_FREE_PAGES, "try_to_free_pages") \
EM( WB_REASON_SYNC, "sync") \
EM( WB_REASON_PERIODIC, "periodic") \
EM( WB_REASON_LAPTOP_TIMER, "laptop_timer") \
EM( WB_REASON_FREE_MORE_MEM, "free_more_memory") \
EM( WB_REASON_FS_FREE_SPACE, "fs_free_space") \
EMe(WB_REASON_FORKER_THREAD, "forker_thread")
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;
TRACE_EVENT(writeback_dirty_page,
TP_PROTO(struct page *page, struct address_space *mapping),
TP_ARGS(page, mapping),
TP_STRUCT__entry (
__array(char, name, 32)
__field(unsigned long, ino)
__field(pgoff_t, index)
),
TP_fast_assign(
strncpy(__entry->name,
mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32);
__entry->ino = mapping ? mapping->host->i_ino : 0;
__entry->index = page->index;
),
TP_printk("bdi %s: ino=%lu index=%lu",
__entry->name,
__entry->ino,
__entry->index
)
);
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(unsigned long, 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 */
strncpy(__entry->name,
bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32);
__entry->ino = inode->i_ino;
__entry->state = inode->i_state;
__entry->flags = flags;
),
TP_printk("bdi %s: ino=%lu 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 unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
{
return wb->memcg_css->cgroup->kn->ino;
}
static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
{
if (wbc->wb)
return __trace_wb_assign_cgroup(wbc->wb);
else
return -1U;
}
#else /* CONFIG_CGROUP_WRITEBACK */
static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
{
return -1U;
}
static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
{
return -1U;
}
#endif /* CONFIG_CGROUP_WRITEBACK */
#endif /* CREATE_TRACE_POINTS */
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(unsigned long, ino)
__field(int, sync_mode)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name,
dev_name(inode_to_bdi(inode)->dev), 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=%lu sync_mode=%d cgroup_ino=%u",
__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(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)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name,
wb->bdi->dev ? dev_name(wb->bdi->dev) : "(unknown)", 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=%u",
__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(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
__entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
),
TP_printk("bdi %s: cgroup_ino=%u",
__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_nowork);
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(
strncpy(__entry->name, dev_name(bdi->dev), 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(long, nr_to_write)
__field(long, pages_skipped)
__field(int, sync_mode)
__field(int, for_kupdate)
__field(int, for_background)
__field(int, for_reclaim)
__field(int, range_cyclic)
__field(long, range_start)
__field(long, range_end)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name, dev_name(bdi->dev), 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->for_reclaim = wbc->for_reclaim;
__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 reclm=%d cyclic=%d "
"start=0x%lx end=0x%lx cgroup_ino=%u",
__entry->name,
__entry->nr_to_write,
__entry->pages_skipped,
__entry->sync_mode,
__entry->for_kupdate,
__entry->for_background,
__entry->for_reclaim,
__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,
int moved),
TP_ARGS(wb, work, moved),
TP_STRUCT__entry(
__array(char, name, 32)
__field(unsigned long, older)
__field(long, age)
__field(int, moved)
__field(int, reason)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
unsigned long *older_than_this = work->older_than_this;
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;
__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=%u",
__entry->name,
__entry->older, /* older_than_this in jiffies */
__entry->age, /* older_than_this 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, nr_unstable)
__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_page_state(NR_FILE_DIRTY);
__entry->nr_writeback = global_page_state(NR_WRITEBACK);
__entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
__entry->nr_dirtied = global_page_state(NR_DIRTIED);
__entry->nr_written = global_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 unstable=%lu "
"bg_thresh=%lu thresh=%lu limit=%lu "
"dirtied=%lu written=%lu",
__entry->nr_dirty,
__entry->nr_writeback,
__entry->nr_unstable,
__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(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)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 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=%u",
__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,
unsigned long thresh,
unsigned long bg_thresh,
unsigned long dirty,
unsigned long bdi_thresh,
unsigned long bdi_dirty,
unsigned long dirty_ratelimit,
unsigned long task_ratelimit,
unsigned long dirtied,
unsigned long period,
long pause,
unsigned long start_time),
TP_ARGS(wb, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
dirty_ratelimit, task_ratelimit,
dirtied, period, pause, start_time),
TP_STRUCT__entry(
__array( char, bdi, 32)
__field(unsigned long, limit)
__field(unsigned long, setpoint)
__field(unsigned long, dirty)
__field(unsigned long, bdi_setpoint)
__field(unsigned long, bdi_dirty)
__field(unsigned long, dirty_ratelimit)
__field(unsigned long, task_ratelimit)
__field(unsigned int, dirtied)
__field(unsigned int, dirtied_pause)
__field(unsigned long, paused)
__field( long, pause)
__field(unsigned long, period)
__field( long, think)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
unsigned long freerun = (thresh + bg_thresh) / 2;
strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 32);
__entry->limit = global_wb_domain.dirty_limit;
__entry->setpoint = (global_wb_domain.dirty_limit +
freerun) / 2;
__entry->dirty = dirty;
__entry->bdi_setpoint = __entry->setpoint *
bdi_thresh / (thresh + 1);
__entry->bdi_dirty = bdi_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 "
"bdi_setpoint=%lu bdi_dirty=%lu "
"dirty_ratelimit=%lu task_ratelimit=%lu "
"dirtied=%u dirtied_pause=%u "
"paused=%lu pause=%ld period=%lu think=%ld cgroup_ino=%u",
__entry->bdi,
__entry->limit,
__entry->setpoint,
__entry->dirty,
__entry->bdi_setpoint,
__entry->bdi_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(unsigned long, ino)
__field(unsigned long, state)
__field(unsigned long, dirtied_when)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name,
dev_name(inode_to_bdi(inode)->dev), 32);
__entry->ino = inode->i_ino;
__entry->state = inode->i_state;
__entry->dirtied_when = inode->dirtied_when;
__entry->cgroup_ino = __trace_wb_assign_cgroup(inode_to_wb(inode));
),
TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu cgroup_ino=%u",
__entry->name,
__entry->ino,
show_inode_state(__entry->state),
__entry->dirtied_when,
(jiffies - __entry->dirtied_when) / HZ,
__entry->cgroup_ino
)
);
DECLARE_EVENT_CLASS(writeback_congest_waited_template,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
TP_ARGS(usec_timeout, usec_delayed),
TP_STRUCT__entry(
__field( unsigned int, usec_timeout )
__field( unsigned int, usec_delayed )
),
TP_fast_assign(
__entry->usec_timeout = usec_timeout;
__entry->usec_delayed = usec_delayed;
),
TP_printk("usec_timeout=%u usec_delayed=%u",
__entry->usec_timeout,
__entry->usec_delayed)
);
DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
TP_ARGS(usec_timeout, usec_delayed)
);
DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
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, dirtied_when)
__field(unsigned long, writeback_index)
__field(long, nr_to_write)
__field(unsigned long, wrote)
__field(unsigned int, cgroup_ino)
),
TP_fast_assign(
strncpy(__entry->name,
dev_name(inode_to_bdi(inode)->dev), 32);
__entry->ino = inode->i_ino;
__entry->state = inode->i_state;
__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=%lu state=%s dirtied_when=%lu age=%lu "
"index=%lu to_write=%ld wrote=%lu cgroup_ino=%u",
__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_lazytime_template,
TP_PROTO(struct inode *inode),
TP_ARGS(inode),
TP_STRUCT__entry(
__field( dev_t, dev )
__field(unsigned long, ino )
__field(unsigned long, state )
__field( __u16, mode )
__field(unsigned long, dirtied_when )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->state = inode->i_state;
__entry->mode = inode->i_mode;
__entry->dirtied_when = inode->dirtied_when;
),
TP_printk("dev %d,%d ino %lu 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_lazytime_template, writeback_lazytime,
TP_PROTO(struct inode *inode),
TP_ARGS(inode)
);
DEFINE_EVENT(writeback_lazytime_template, writeback_lazytime_iput,
TP_PROTO(struct inode *inode),
TP_ARGS(inode)
);
DEFINE_EVENT(writeback_lazytime_template, writeback_dirty_inode_enqueue,
TP_PROTO(struct inode *inode),
TP_ARGS(inode)
);
#endif /* _TRACE_WRITEBACK_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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