mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
bcachefs: Better journal tracepoints
Factor out bch2_journal_bufs_to_text(), and use it in the journal_entry_full() tracepoint; when we can't get a journal reservation we need to know the outstanding journal entry sizes to know if the problem is due to excessive flushing. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
parent
4ae016607b
commit
e6a2566f7a
2 changed files with 79 additions and 60 deletions
|
|
@ -27,6 +27,47 @@ static const char * const bch2_journal_errors[] = {
|
|||
NULL
|
||||
};
|
||||
|
||||
static void bch2_journal_buf_to_text(struct printbuf *out, struct journal *j, u64 seq)
|
||||
{
|
||||
union journal_res_state s = READ_ONCE(j->reservations);
|
||||
unsigned i = seq & JOURNAL_BUF_MASK;
|
||||
struct journal_buf *buf = j->buf + i;
|
||||
|
||||
prt_printf(out, "seq:");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%llu", seq);
|
||||
prt_newline(out);
|
||||
printbuf_indent_add(out, 2);
|
||||
|
||||
prt_printf(out, "refcount:");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%u", journal_state_count(s, i));
|
||||
prt_newline(out);
|
||||
|
||||
prt_printf(out, "size:");
|
||||
prt_tab(out);
|
||||
prt_human_readable_u64(out, vstruct_bytes(buf->data));
|
||||
prt_newline(out);
|
||||
|
||||
prt_printf(out, "expires");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%li jiffies", buf->expires - jiffies);
|
||||
prt_newline(out);
|
||||
|
||||
printbuf_indent_sub(out, 2);
|
||||
}
|
||||
|
||||
static void bch2_journal_bufs_to_text(struct printbuf *out, struct journal *j)
|
||||
{
|
||||
if (!out->nr_tabstops)
|
||||
printbuf_tabstop_push(out, 24);
|
||||
|
||||
for (u64 seq = journal_last_unwritten_seq(j);
|
||||
seq <= journal_cur_seq(j);
|
||||
seq++)
|
||||
bch2_journal_buf_to_text(out, j, seq);
|
||||
}
|
||||
|
||||
static inline bool journal_seq_unwritten(struct journal *j, u64 seq)
|
||||
{
|
||||
return seq > j->seq_ondisk;
|
||||
|
|
@ -156,7 +197,7 @@ void bch2_journal_buf_put_final(struct journal *j, u64 seq, bool write)
|
|||
* We don't close a journal_buf until the next journal_buf is finished writing,
|
||||
* and can be opened again - this also initializes the next journal_buf:
|
||||
*/
|
||||
static void __journal_entry_close(struct journal *j, unsigned closed_val)
|
||||
static void __journal_entry_close(struct journal *j, unsigned closed_val, bool trace)
|
||||
{
|
||||
struct bch_fs *c = container_of(j, struct bch_fs, journal);
|
||||
struct journal_buf *buf = journal_cur_buf(j);
|
||||
|
|
@ -185,7 +226,17 @@ static void __journal_entry_close(struct journal *j, unsigned closed_val)
|
|||
/* Close out old buffer: */
|
||||
buf->data->u64s = cpu_to_le32(old.cur_entry_offset);
|
||||
|
||||
trace_journal_entry_close(c, vstruct_bytes(buf->data));
|
||||
if (trace_journal_entry_close_enabled() && trace) {
|
||||
struct printbuf pbuf = PRINTBUF;
|
||||
pbuf.atomic++;
|
||||
|
||||
prt_str(&pbuf, "entry size: ");
|
||||
prt_human_readable_u64(&pbuf, vstruct_bytes(buf->data));
|
||||
prt_newline(&pbuf);
|
||||
bch2_prt_task_backtrace(&pbuf, current, 1);
|
||||
trace_journal_entry_close(c, pbuf.buf);
|
||||
printbuf_exit(&pbuf);
|
||||
}
|
||||
|
||||
sectors = vstruct_blocks_plus(buf->data, c->block_bits,
|
||||
buf->u64s_reserved) << c->block_bits;
|
||||
|
|
@ -225,7 +276,7 @@ static void __journal_entry_close(struct journal *j, unsigned closed_val)
|
|||
void bch2_journal_halt(struct journal *j)
|
||||
{
|
||||
spin_lock(&j->lock);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL, true);
|
||||
if (!j->err_seq)
|
||||
j->err_seq = journal_cur_seq(j);
|
||||
journal_wake(j);
|
||||
|
|
@ -239,7 +290,7 @@ static bool journal_entry_want_write(struct journal *j)
|
|||
|
||||
/* Don't close it yet if we already have a write in flight: */
|
||||
if (ret)
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
|
||||
else if (nr_unwritten_journal_entries(j)) {
|
||||
struct journal_buf *buf = journal_cur_buf(j);
|
||||
|
||||
|
|
@ -406,7 +457,7 @@ static void journal_write_work(struct work_struct *work)
|
|||
if (delta > 0)
|
||||
mod_delayed_work(c->io_complete_wq, &j->write_work, delta);
|
||||
else
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
|
||||
unlock:
|
||||
spin_unlock(&j->lock);
|
||||
}
|
||||
|
|
@ -463,13 +514,21 @@ static int __journal_res_get(struct journal *j, struct journal_res *res,
|
|||
buf->buf_size < JOURNAL_ENTRY_SIZE_MAX)
|
||||
j->buf_size_want = max(j->buf_size_want, buf->buf_size << 1);
|
||||
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, false);
|
||||
ret = journal_entry_open(j);
|
||||
|
||||
if (ret == JOURNAL_ERR_max_in_flight) {
|
||||
track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight],
|
||||
&j->max_in_flight_start, true);
|
||||
trace_and_count(c, journal_entry_full, c);
|
||||
if (trace_journal_entry_full_enabled()) {
|
||||
struct printbuf buf = PRINTBUF;
|
||||
buf.atomic++;
|
||||
|
||||
bch2_journal_bufs_to_text(&buf, j);
|
||||
trace_journal_entry_full(c, buf.buf);
|
||||
printbuf_exit(&buf);
|
||||
}
|
||||
count_event(c, journal_entry_full);
|
||||
}
|
||||
unlock:
|
||||
can_discard = j->can_discard;
|
||||
|
|
@ -549,7 +608,7 @@ void bch2_journal_entry_res_resize(struct journal *j,
|
|||
/*
|
||||
* Not enough room in current journal entry, have to flush it:
|
||||
*/
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
|
||||
} else {
|
||||
journal_cur_buf(j)->u64s_reserved += d;
|
||||
}
|
||||
|
|
@ -606,7 +665,7 @@ int bch2_journal_flush_seq_async(struct journal *j, u64 seq,
|
|||
struct journal_res res = { 0 };
|
||||
|
||||
if (journal_entry_is_open(j))
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
|
||||
|
||||
spin_unlock(&j->lock);
|
||||
|
||||
|
|
@ -786,7 +845,7 @@ static struct journal_buf *__bch2_next_write_buffer_flush_journal_buf(struct jou
|
|||
|
||||
if (buf->need_flush_to_write_buffer) {
|
||||
if (seq == journal_cur_seq(j))
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
|
||||
__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
|
||||
|
||||
union journal_res_state s;
|
||||
s.v = atomic64_read_acquire(&j->reservations.counter);
|
||||
|
|
@ -1339,35 +1398,9 @@ void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)
|
|||
}
|
||||
|
||||
prt_newline(out);
|
||||
|
||||
for (u64 seq = journal_cur_seq(j);
|
||||
seq >= journal_last_unwritten_seq(j);
|
||||
--seq) {
|
||||
unsigned i = seq & JOURNAL_BUF_MASK;
|
||||
|
||||
prt_printf(out, "unwritten entry:");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%llu", seq);
|
||||
prt_printf(out, "unwritten entries:");
|
||||
prt_newline(out);
|
||||
printbuf_indent_add(out, 2);
|
||||
|
||||
prt_printf(out, "refcount:");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%u", journal_state_count(s, i));
|
||||
prt_newline(out);
|
||||
|
||||
prt_printf(out, "sectors:");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%u", j->buf[i].sectors);
|
||||
prt_newline(out);
|
||||
|
||||
prt_printf(out, "expires");
|
||||
prt_tab(out);
|
||||
prt_printf(out, "%li jiffies", j->buf[i].expires - jiffies);
|
||||
prt_newline(out);
|
||||
|
||||
printbuf_indent_sub(out, 2);
|
||||
}
|
||||
bch2_journal_bufs_to_text(out, j);
|
||||
|
||||
prt_printf(out,
|
||||
"replay done:\t\t%i\n",
|
||||
|
|
|
|||
|
|
@ -46,7 +46,7 @@ DECLARE_EVENT_CLASS(fs_str,
|
|||
__assign_str(str, str);
|
||||
),
|
||||
|
||||
TP_printk("%d,%d %s", MAJOR(__entry->dev), MINOR(__entry->dev), __get_str(str))
|
||||
TP_printk("%d,%d\n%s", MAJOR(__entry->dev), MINOR(__entry->dev), __get_str(str))
|
||||
);
|
||||
|
||||
DECLARE_EVENT_CLASS(trans_str,
|
||||
|
|
@ -273,28 +273,14 @@ DEFINE_EVENT(bch_fs, journal_full,
|
|||
TP_ARGS(c)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(bch_fs, journal_entry_full,
|
||||
TP_PROTO(struct bch_fs *c),
|
||||
TP_ARGS(c)
|
||||
DEFINE_EVENT(fs_str, journal_entry_full,
|
||||
TP_PROTO(struct bch_fs *c, const char *str),
|
||||
TP_ARGS(c, str)
|
||||
);
|
||||
|
||||
TRACE_EVENT(journal_entry_close,
|
||||
TP_PROTO(struct bch_fs *c, unsigned bytes),
|
||||
TP_ARGS(c, bytes),
|
||||
|
||||
TP_STRUCT__entry(
|
||||
__field(dev_t, dev )
|
||||
__field(u32, bytes )
|
||||
),
|
||||
|
||||
TP_fast_assign(
|
||||
__entry->dev = c->dev;
|
||||
__entry->bytes = bytes;
|
||||
),
|
||||
|
||||
TP_printk("%d,%d entry bytes %u",
|
||||
MAJOR(__entry->dev), MINOR(__entry->dev),
|
||||
__entry->bytes)
|
||||
DEFINE_EVENT(fs_str, journal_entry_close,
|
||||
TP_PROTO(struct bch_fs *c, const char *str),
|
||||
TP_ARGS(c, str)
|
||||
);
|
||||
|
||||
DEFINE_EVENT(bio, journal_write,
|
||||
|
|
|
|||
Loading…
Reference in a new issue