linux-kernel - [PATCH AUTOSEL 6.4 11/26] devlink: make health report on unregistered instance warn just once

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Message-Id: <20230709151255.512931-11-sashal@kernel.org>
Date:   Sun,  9 Jul 2023 11:12:40 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...dia.com>,
        Sasha Levin <sashal@...nel.org>, jiri@...nulli.us,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 6.4 11/26] devlink: make health report on unregistered instance warn just once

From: Jakub Kicinski <kuba@...nel.org>

[ Upstream commit 6f4b98147b8dfcabacb19b5c6abd087af66d0049 ]

Devlink health is involved in error recovery. Machines in bad
state tend to be fairly unreliable, and occasionally get stuck
in error loops. Even with a reasonable grace period devlink health
may get a thousand reports in an hour.

In case of reporting on an unregistered devlink instance
the subsequent reports don't add much value. Switch to
WARN_ON_ONCE() to avoid flooding dmesg and fleet monitoring
dashboards.

Reviewed-by: Jiri Pirko <jiri@...dia.com>
Link: https://lore.kernel.org/r/20230531015523.48961-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/devlink/health.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/devlink/health.c b/net/devlink/health.c
index 0839706d5741a..194340a8bb863 100644
--- a/net/devlink/health.c
+++ b/net/devlink/health.c
@@ -480,7 +480,7 @@ static void devlink_recover_notify(struct devlink_health_reporter *reporter,
 	int err;
 
 	WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
-	WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));
+	ASSERT_DEVLINK_REGISTERED(devlink);
 
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!msg)
-- 
2.39.2