linux-kernel - [PATCH v3 2/3] misc_cgroup: remove error log to avoid log flood

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Date:   Wed, 15 Sep 2021 10:18:50 +0800
From:   brookxu <brookxu.cn@...il.com>
To:     tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org
Cc:     vipinsh@...gle.com, mkoutny@...e.com, corbet@....net,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: [PATCH v3 2/3] misc_cgroup: remove error log to avoid log flood

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

In scenarios where containers are frequently created and deleted,
a large number of error logs maybe generated. This log provides
less information, we can get more detailed info from misc.events.
>From this, perhaps we can remove it.

Signed-off-by: Chunguang Xu <brookxu@...cent.com>
---
 include/linux/misc_cgroup.h | 1 -
 kernel/cgroup/misc.c        | 7 -------
 2 files changed, 8 deletions(-)

diff --git a/include/linux/misc_cgroup.h b/include/linux/misc_cgroup.h
index 091f2d2..c238207 100644
--- a/include/linux/misc_cgroup.h
+++ b/include/linux/misc_cgroup.h
@@ -37,7 +37,6 @@ struct misc_res {
 	unsigned long max;
 	atomic_long_t usage;
 	atomic_long_t events;
-	bool failed;
 };
 
 /**
diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c
index 4b2b492..fe3e8a0 100644
--- a/kernel/cgroup/misc.c
+++ b/kernel/cgroup/misc.c
@@ -157,13 +157,6 @@ int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg,
 		new_usage = atomic_long_add_return(amount, &res->usage);
 		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;
-			}
 			ret = -EBUSY;
 			goto err_charge;
 		}
-- 
1.8.3.1