From 338bd52f3c3a86a1feea8c9a121d1cee60d68d69 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Tue, 18 Apr 2017 17:00:12 +0200 Subject: [PATCH] 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" (18dc22c19bef520cca11ce4c0807ac9dec48d31f) went to 4.11-rc1 and the plan was to get the fix as well, but this hasn't happened. CC: Qu Wenruo Reviewed-by: Qu Wenruo Signed-off-by: David Sterba --- fs/btrfs/qgroup.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index a59801dc2a34..afbea61d957e 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -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;