When debugging early enospc problems it was useful to have a tracepoint
where we failed all tickets so I could check the state of the enospc
counters at failure time to validate my fixes. This adds the tracpoint
so you can easily get that information.
Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
fs/btrfs/space-info.c | 2 ++
include/trace/events/btrfs.h | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c
index 392997376a1c..af161eb808a2 100644
--- a/fs/btrfs/space-info.c
+++ b/fs/btrfs/space-info.c
@@ -825,6 +825,8 @@ static bool maybe_fail_all_tickets(struct btrfs_fs_info *fs_info,
struct reserve_ticket *ticket;
u64 tickets_id = space_info->tickets_id;
+ trace_btrfs_fail_all_tickets(fs_info, space_info);
+
if (btrfs_test_opt(fs_info, ENOSPC_DEBUG)) {
btrfs_info(fs_info, "cannot satisfy tickets, dumping space info");
__btrfs_dump_space_info(fs_info, space_info);
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index c7237317a8b9..3d81ba8c37b9 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -2098,6 +2098,12 @@ DEFINE_EVENT(btrfs_dump_space_info, btrfs_done_preemptive_reclaim,
TP_ARGS(fs_info, sinfo)
);
+DEFINE_EVENT(btrfs_dump_space_info, btrfs_fail_all_tickets,
+ TP_PROTO(const struct btrfs_fs_info *fs_info,
+ const struct btrfs_space_info *sinfo),
+ TP_ARGS(fs_info, sinfo)
+);
+
TRACE_EVENT(btrfs_reserve_ticket,
TP_PROTO(const struct btrfs_fs_info *fs_info, u64 flags, u64 bytes,
u64 start_ns, int flush, int error),
--
2.26.3
