Commit fcdef39c authored by Josef Bacik's avatar Josef Bacik Committed by David Sterba
Browse files

btrfs: enable a tracepoint when we fail tickets 



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.

Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 8197766d

fs/btrfs/space-info.c

+2 −0
Original line number Diff line number Diff line
@@ -824,6 +824,8 @@ 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);

include/trace/events/btrfs.h

+6 −0
Original line number Diff line number Diff line
@@ -2104,6 +2104,12 @@ 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(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),