[PATCH 3/3] mm/percpu.c: print error message too if atomic alloc failed

From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, dennis@kernel.org,
	tj@kernel.org, cl@linux.com, mawupeng1@huawei.com,
	Baoquan He <bhe@redhat.com>
Subject: [PATCH 3/3] mm/percpu.c: print error message too if atomic alloc failed
Date: Fri, 21 Jul 2023 21:18:00 +0800	[thread overview]
Message-ID: <20230721131800.20003-4-bhe@redhat.com> (raw)
In-Reply-To: <20230721131800.20003-1-bhe@redhat.com>

The variable 'err' is assgigned to an error message if atomic alloc
failed, while it has no chance to be printed if is_atomic is true.

Here change to print error message too if atomic alloc failed, while
avoid to call dump_stack() if that case.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 mm/percpu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index c25b058a46ad..74f75ef0ad58 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1890,13 +1890,15 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved,
 fail:
 	trace_percpu_alloc_percpu_fail(reserved, is_atomic, size, align);
 
-	if (!is_atomic && do_warn && warn_limit) {
+	if (do_warn && warn_limit) {
 		pr_warn("allocation failed, size=%zu align=%zu atomic=%d, %s\n",
 			size, align, is_atomic, err);
-		dump_stack();
+		if (is_atomic)
+			dump_stack();
 		if (!--warn_limit)
 			pr_info("limit reached, disable warning\n");
 	}
+
 	if (is_atomic) {
 		/* see the flag handling in pcpu_balance_workfn() */
 		pcpu_atomic_alloc_failed = true;
-- 
2.34.1

