linux-kernel - [RFC PATCH v2 3/3] misc_cgroup: delete failed logs to avoid log flooding

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Message-Id: <e2b0dd55908750bfb0a97efae4f4e2dff2ab6a4a.1626966339.git.brookxu@tencent.com>
Date:   Thu, 22 Jul 2021 23:20:19 +0800
From:   brookxu <brookxu.cn@...il.com>
To:     viro@...iv.linux.org.uk, tj@...nel.org, lizefan.x@...edance.com,
        hannes@...xchg.org
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        cgroups@...r.kernel.org
Subject: [RFC PATCH v2 3/3] misc_cgroup: delete failed logs to avoid log flooding

From: Chunguang Xu <brookxu@...cent.com>

Since the upper-level logic will constantly retry when it fails, in
high-stress scenarios, a large number of failure logs may affect
performance. Therefore, we can replace it with the failcnt counter.

Signed-off-by: Chunguang Xu <brookxu@...cent.com>
---
 kernel/cgroup/misc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c
index 7c568b619f82..b7de0fafa48a 100644
--- a/kernel/cgroup/misc.c
+++ b/kernel/cgroup/misc.c
@@ -159,8 +159,6 @@ int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg,
 		if (new_usage > READ_ONCE(res->max) ||
 		    new_usage > READ_ONCE(misc_res_capacity[type])) {
 			if (!res->failed) {
-				pr_info("cgroup: charge rejected by the misc controller for %s resource in ",
-					misc_res_name[type]);
 				pr_cont_cgroup_path(i->css.cgroup);
 				pr_cont("\n");
 				res->failed = true;
-- 
2.30.0