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xfs: add iclog state trace events

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For the DEBUGS!

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Dave Chinner 2021-06-18 11:57:05 -07:00 committed by Darrick J. Wong
parent 5f9b4b0de8
commit 956f6daa84
3 changed files with 88 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

18
fs/xfs/xfs_log.c
View file

@ -502,6 +502,7 @@ __xlog_state_release_iclog(
iclog->ic_header.h_tail_lsn = cpu_to_be64(tail_lsn);
xlog_verify_tail_lsn(log, iclog, tail_lsn);
/* cycle incremented when incrementing curr_block */
trace_xlog_iclog_syncing(iclog, _RET_IP_);
return true;
}
@ -520,6 +521,7 @@ xlog_state_release_iclog(
{
lockdep_assert_held(&log->l_icloglock);
trace_xlog_iclog_release(iclog, _RET_IP_);
if (iclog->ic_state == XLOG_STATE_IOERROR)
return -EIO;
@ -781,6 +783,7 @@ xlog_wait_on_iclog(
{
struct xlog *log = iclog->ic_log;
trace_xlog_iclog_wait_on(iclog, _RET_IP_);
if (!XLOG_FORCED_SHUTDOWN(log) &&
iclog->ic_state != XLOG_STATE_ACTIVE &&
iclog->ic_state != XLOG_STATE_DIRTY) {
@ -1754,6 +1757,7 @@ xlog_write_iclog(
unsigned int count)
{
ASSERT(bno < log->l_logBBsize);
trace_xlog_iclog_write(iclog, _RET_IP_);
/*
* We lock the iclogbufs here so that we can serialise against I/O
@ -1899,6 +1903,7 @@ xlog_sync(
unsigned int size;
ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
trace_xlog_iclog_sync(iclog, _RET_IP_);
count = xlog_calc_iclog_size(log, iclog, &roundoff);
@ -2535,6 +2540,7 @@ xlog_state_activate_iclog(
int *iclogs_changed)
{
ASSERT(list_empty_careful(&iclog->ic_callbacks));
trace_xlog_iclog_activate(iclog, _RET_IP_);
/*
* If the number of ops in this iclog indicate it just contains the
@ -2624,6 +2630,8 @@ xlog_state_clean_iclog(
{
int iclogs_changed = 0;
trace_xlog_iclog_clean(dirty_iclog, _RET_IP_);
dirty_iclog->ic_state = XLOG_STATE_DIRTY;
xlog_state_activate_iclogs(log, &iclogs_changed);
@ -2683,6 +2691,7 @@ xlog_state_set_callback(
struct xlog_in_core *iclog,
xfs_lsn_t header_lsn)
{
trace_xlog_iclog_callback(iclog, _RET_IP_);
iclog->ic_state = XLOG_STATE_CALLBACK;
ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn),
@ -2764,6 +2773,7 @@ xlog_state_do_iclog_callbacks(
__releases(&log->l_icloglock)
__acquires(&log->l_icloglock)
{
trace_xlog_iclog_callbacks_start(iclog, _RET_IP_);
spin_unlock(&log->l_icloglock);
spin_lock(&iclog->ic_callback_lock);
while (!list_empty(&iclog->ic_callbacks)) {
@ -2783,6 +2793,7 @@ xlog_state_do_iclog_callbacks(
*/
spin_lock(&log->l_icloglock);
spin_unlock(&iclog->ic_callback_lock);
trace_xlog_iclog_callbacks_done(iclog, _RET_IP_);
}
STATIC void
@ -2874,6 +2885,7 @@ xlog_state_done_syncing(
spin_lock(&log->l_icloglock);
ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
trace_xlog_iclog_sync_done(iclog, _RET_IP_);
/*
* If we got an error, either on the first buffer, or in the case of
@ -2947,6 +2959,8 @@ xlog_state_get_iclog_space(
atomic_inc(&iclog->ic_refcnt); /* prevents sync */
log_offset = iclog->ic_offset;
trace_xlog_iclog_get_space(iclog, _RET_IP_);
/* On the 1st write to an iclog, figure out lsn. This works
* if iclogs marked XLOG_STATE_WANT_SYNC always write out what they are
* committing to. If the offset is set, that's how many blocks
@ -3112,6 +3126,7 @@ xlog_state_switch_iclogs(
{
ASSERT(iclog->ic_state == XLOG_STATE_ACTIVE);
assert_spin_locked(&log->l_icloglock);
trace_xlog_iclog_switch(iclog, _RET_IP_);
if (!eventual_size)
eventual_size = iclog->ic_offset;
@ -3194,6 +3209,8 @@ xfs_log_force(
if (iclog->ic_state == XLOG_STATE_IOERROR)
goto out_error;
trace_xlog_iclog_force(iclog, _RET_IP_);
if (iclog->ic_state == XLOG_STATE_DIRTY ||
(iclog->ic_state == XLOG_STATE_ACTIVE &&
atomic_read(&iclog->ic_refcnt) == 0 && iclog->ic_offset == 0)) {
@ -3267,6 +3284,7 @@ xlog_force_lsn(
goto out_error;
while (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) {
trace_xlog_iclog_force_lsn(iclog, _RET_IP_);
iclog = iclog->ic_next;
if (iclog == log->l_iclog)
goto out_unlock;

10
fs/xfs/xfs_log_priv.h
View file

@ -50,6 +50,16 @@ enum xlog_iclog_state {
XLOG_STATE_IOERROR, /* IO error happened in sync'ing log */
};
#define XLOG_STATE_STRINGS \
{ XLOG_STATE_ACTIVE, "XLOG_STATE_ACTIVE" }, \
{ XLOG_STATE_WANT_SYNC, "XLOG_STATE_WANT_SYNC" }, \
{ XLOG_STATE_SYNCING, "XLOG_STATE_SYNCING" }, \
{ XLOG_STATE_DONE_SYNC, "XLOG_STATE_DONE_SYNC" }, \
{ XLOG_STATE_CALLBACK, "XLOG_STATE_CALLBACK" }, \
{ XLOG_STATE_DIRTY, "XLOG_STATE_DIRTY" }, \
{ XLOG_STATE_IOERROR, "XLOG_STATE_IOERROR" }
/*
* Log ticket flags
*/

60
fs/xfs/xfs_trace.h
View file

@ -24,6 +24,7 @@ struct xlog_ticket;
struct xlog_recover;
struct xlog_recover_item;
struct xlog_rec_header;
struct xlog_in_core;
struct xfs_buf_log_format;
struct xfs_inode_log_format;
struct xfs_bmbt_irec;
@ -3927,6 +3928,65 @@ DEFINE_EVENT(xfs_icwalk_class, name, \
DEFINE_ICWALK_EVENT(xfs_ioc_free_eofblocks);
DEFINE_ICWALK_EVENT(xfs_blockgc_free_space);
TRACE_DEFINE_ENUM(XLOG_STATE_ACTIVE);
TRACE_DEFINE_ENUM(XLOG_STATE_WANT_SYNC);
TRACE_DEFINE_ENUM(XLOG_STATE_SYNCING);
TRACE_DEFINE_ENUM(XLOG_STATE_DONE_SYNC);
TRACE_DEFINE_ENUM(XLOG_STATE_CALLBACK);
TRACE_DEFINE_ENUM(XLOG_STATE_DIRTY);
TRACE_DEFINE_ENUM(XLOG_STATE_IOERROR);
DECLARE_EVENT_CLASS(xlog_iclog_class,
TP_PROTO(struct xlog_in_core *iclog, unsigned long caller_ip),
TP_ARGS(iclog, caller_ip),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(uint32_t, state)
__field(int32_t, refcount)
__field(uint32_t, offset)
__field(unsigned long long, lsn)
__field(unsigned long, caller_ip)
),
TP_fast_assign(
__entry->dev = iclog->ic_log->l_mp->m_super->s_dev;
__entry->state = iclog->ic_state;
__entry->refcount = atomic_read(&iclog->ic_refcnt);
__entry->offset = iclog->ic_offset;
__entry->lsn = be64_to_cpu(iclog->ic_header.h_lsn);
__entry->caller_ip = caller_ip;
),
TP_printk("dev %d:%d state %s refcnt %d offset %u lsn 0x%llx caller %pS",
MAJOR(__entry->dev), MINOR(__entry->dev),
__print_symbolic(__entry->state, XLOG_STATE_STRINGS),
__entry->refcount,
__entry->offset,
__entry->lsn,
(char *)__entry->caller_ip)
);
#define DEFINE_ICLOG_EVENT(name) \
DEFINE_EVENT(xlog_iclog_class, name, \
TP_PROTO(struct xlog_in_core *iclog, unsigned long caller_ip), \
TP_ARGS(iclog, caller_ip))
DEFINE_ICLOG_EVENT(xlog_iclog_activate);
DEFINE_ICLOG_EVENT(xlog_iclog_clean);
DEFINE_ICLOG_EVENT(xlog_iclog_callback);
DEFINE_ICLOG_EVENT(xlog_iclog_callbacks_start);
DEFINE_ICLOG_EVENT(xlog_iclog_callbacks_done);
DEFINE_ICLOG_EVENT(xlog_iclog_force);
DEFINE_ICLOG_EVENT(xlog_iclog_force_lsn);
DEFINE_ICLOG_EVENT(xlog_iclog_get_space);
DEFINE_ICLOG_EVENT(xlog_iclog_release);
DEFINE_ICLOG_EVENT(xlog_iclog_switch);
DEFINE_ICLOG_EVENT(xlog_iclog_sync);
DEFINE_ICLOG_EVENT(xlog_iclog_syncing);
DEFINE_ICLOG_EVENT(xlog_iclog_sync_done);
DEFINE_ICLOG_EVENT(xlog_iclog_want_sync);
DEFINE_ICLOG_EVENT(xlog_iclog_wait_on);
DEFINE_ICLOG_EVENT(xlog_iclog_write);
#endif /* _TRACE_XFS_H */
#undef TRACE_INCLUDE_PATH