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Commit 338bd52f authored by David Sterba's avatar David Sterba
Browse files

btrfs: qgroup: move noisy underflow warning to debugging build 



The WARN_ON and warning from report_reserved_underflow can become very
noisy and is visible unconditionally although this is namely for
debugging. The patch "btrfs: Add WARN_ON for qgroup reserved underflow"
(18dc22c1) went to 4.11-rc1 and the plan
was to get the fix as well, but this hasn't happened.

CC: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: default avatarQu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent a967efb3

fs/btrfs/qgroup.c

+7 −4
Original line number Diff line number Diff line
@@ -1042,9 +1042,12 @@ static void report_reserved_underflow(struct btrfs_fs_info *fs_info, 
				      struct btrfs_qgroup *qgroup,

				      u64 num_bytes)

{

	btrfs_warn(fs_info,

#ifdef CONFIG_BTRFS_DEBUG

	WARN_ON(qgroup->reserved < num_bytes);

	btrfs_debug(fs_info,

		"qgroup %llu reserved space underflow, have: %llu, to free: %llu",

		qgroup->qgroupid, qgroup->reserved, num_bytes);

#endif

	qgroup->reserved = 0;

}

/*
@@ -1075,7 +1078,7 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, 
	qgroup->excl += sign * num_bytes;

	qgroup->excl_cmpr += sign * num_bytes;

	if (sign > 0) {

		if (WARN_ON(qgroup->reserved < num_bytes))

		if (qgroup->reserved < num_bytes)

			report_reserved_underflow(fs_info, qgroup, num_bytes);

		else

			qgroup->reserved -= num_bytes;
@@ -1100,7 +1103,7 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, 
		WARN_ON(sign < 0 && qgroup->excl < num_bytes);

		qgroup->excl += sign * num_bytes;

		if (sign > 0) {

			if (WARN_ON(qgroup->reserved < num_bytes))

			if (qgroup->reserved < num_bytes)

				report_reserved_underflow(fs_info, qgroup,

							  num_bytes);

			else
@@ -2469,7 +2472,7 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info, 


		qg = unode_aux_to_qgroup(unode);



		if (WARN_ON(qg->reserved < num_bytes))

		if (qg->reserved < num_bytes)

			report_reserved_underflow(fs_info, qg, num_bytes);

		else

			qg->reserved -= num_bytes;