linux-kernel - [PATCH rcu 06/17] refscale: Always log the error message

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Date:   Wed,  1 Dec 2021 16:43:25 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, akpm@...ux-foundation.org,
        mathieu.desnoyers@...icios.com, josh@...htriplett.org,
        tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com, joel@...lfernandes.org,
        Li Zhijian <lizhijian@...fujitsu.com>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 06/17] refscale: Always log the error message

From: Li Zhijian <lizhijian@...fujitsu.com>

An OOM is a serious error that should be logged even in non-verbose runs.
This commit therefore adds an unconditional SCALEOUT_ERRSTRING() macro
and uses it instead of VERBOSE_SCALEOUT_ERRSTRING() when reporting an OOM.

Signed-off-by: Li Zhijian <lizhijian@...fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/refscale.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c
index d8ed1ca3adc04..e5b0c2160592b 100644
--- a/kernel/rcu/refscale.c
+++ b/kernel/rcu/refscale.c
@@ -58,8 +58,8 @@ do {											\
 	}										\
 } while (0)
 
-#define VERBOSE_SCALEOUT_ERRSTRING(s, x...) \
-	do { if (verbose) pr_alert("%s" SCALE_FLAG "!!! " s, scale_type, ## x); } while (0)
+#define SCALEOUT_ERRSTRING(s, x...) \
+	do { pr_alert("%s" SCALE_FLAG "!!! " s, scale_type, ## x); } while (0)
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Joel Fernandes (Google) <joel@...lfernandes.org>");
@@ -651,7 +651,7 @@ static int main_func(void *arg)
 	result_avg = kzalloc(nruns * sizeof(*result_avg), GFP_KERNEL);
 	buf = kzalloc(800 + 64, GFP_KERNEL);
 	if (!result_avg || !buf) {
-		VERBOSE_SCALEOUT_ERRSTRING("out of memory");
+		SCALEOUT_ERRSTRING("out of memory");
 		goto oom_exit;
 	}
 	if (holdoff)
@@ -837,7 +837,7 @@ ref_scale_init(void)
 	reader_tasks = kcalloc(nreaders, sizeof(reader_tasks[0]),
 			       GFP_KERNEL);
 	if (!reader_tasks) {
-		VERBOSE_SCALEOUT_ERRSTRING("out of memory");
+		SCALEOUT_ERRSTRING("out of memory");
 		firsterr = -ENOMEM;
 		goto unwind;
 	}
-- 
2.31.1.189.g2e36527f23