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bcachefs: Add a few tracepoints

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Transaction restart tracing should probably be overhaulled at some
point.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-04-11 12:32:27 -04:00 committed by Kent Overstreet
parent f270667a7f
commit 297604c923
2 changed files with 22 additions and 1 deletions
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6
fs/bcachefs/btree_update_interior.c
View File

@ -1555,8 +1555,10 @@ int bch2_btree_split_leaf(struct bch_fs *c, struct btree_iter *iter,
/* Hack, because gc and splitting nodes doesn't mix yet: */
if (!(flags & BTREE_INSERT_GC_LOCK_HELD) &&
!down_read_trylock(&c->gc_lock)) {
if (flags & BTREE_INSERT_NOUNLOCK)
if (flags & BTREE_INSERT_NOUNLOCK) {
trace_transaction_restart_ip(trans->ip, _THIS_IP_);
return -EINTR;
}
bch2_trans_unlock(trans);
down_read(&c->gc_lock);
@ -1584,6 +1586,8 @@ int bch2_btree_split_leaf(struct bch_fs *c, struct btree_iter *iter,
BUG_ON(flags & BTREE_INSERT_NOUNLOCK);
bch2_trans_unlock(trans);
ret = -EINTR;
trace_transaction_restart_ip(trans->ip, _THIS_IP_);
}
goto out;
}

17
fs/bcachefs/trace.h
View File

@ -499,6 +499,23 @@ TRACE_EVENT(copygc,
__entry->buckets_moved, __entry->buckets_not_moved)
);
TRACE_EVENT(transaction_restart_ip,
TP_PROTO(unsigned long caller, unsigned long ip),
TP_ARGS(caller, ip),
TP_STRUCT__entry(
__field(unsigned long, caller )
__field(unsigned long, ip )
),
TP_fast_assign(
__entry->caller = caller;
__entry->ip = ip;
),
TP_printk("%pF %pF", (void *) __entry->caller, (void *) __entry->ip)
);
DECLARE_EVENT_CLASS(transaction_restart,
TP_PROTO(unsigned long ip),
TP_ARGS(ip),