From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B81BC433F5 for ; Tue, 17 May 2022 11:16:27 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1CCAC6B0072; Tue, 17 May 2022 07:16:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 17C946B0073; Tue, 17 May 2022 07:16:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 06C126B0074; Tue, 17 May 2022 07:16:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id ED7136B0072 for ; Tue, 17 May 2022 07:16:26 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id C0BF660CBE for ; Tue, 17 May 2022 11:16:26 +0000 (UTC) X-FDA: 79474981572.16.74996FF Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf24.hostedemail.com (Postfix) with ESMTP id E4D561800E9 for ; Tue, 17 May 2022 11:16:13 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1652786181; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=GFXG0AL6zVxDtCvLO8G/I3Q+cbj8L0rmDOvKuJnP0cQ=; b=kp7PzIjiERLpqYpHH9XcqYxVOmNWGjmMTGRUMQM+mfVcIPsO3beCeuBzIU2oySxw1sqydu 0fhKnP7YNbLj843eXuBoTY+hZyuj+Wn3MSjr4kDXl20x2tJ4JD5G5WbFrU4ZqC4WcVTA9o HXusew75KbfGEuTN5Qtx7pm4Mh/QKBw= From: Jackie Liu To: glider@google.com Cc: elver@google.com, dvyukov@google.com, kasan-dev@googlegroups.com, linux-mm@kvack.org Subject: [PATCH] mm/kfence: print disabling or re-enabling message Date: Tue, 17 May 2022 19:15:51 +0800 Message-Id: <20220517111551.4077061-1-liu.yun@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Stat-Signature: 9dfgu53iydwn1mxuy17tzqtto1mbgakh X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: E4D561800E9 Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=kp7PzIji; spf=pass (imf24.hostedemail.com: domain of liu.yun@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=liu.yun@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Rspam-User: X-HE-Tag: 1652786173-121873 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Jackie Liu By printing information, we can friendly prompt the status change information of kfence by dmesg. Signed-off-by: Jackie Liu --- mm/kfence/core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/kfence/core.c b/mm/kfence/core.c index 11a954763be9..beb552089b67 100644 --- a/mm/kfence/core.c +++ b/mm/kfence/core.c @@ -67,8 +67,11 @@ static int param_set_sample_interval(const char *val, const struct kernel_param if (ret < 0) return ret; - if (!num) /* Using 0 to indicate KFENCE is disabled. */ + if (!num) { + /* Using 0 to indicate KFENCE is disabled. */ WRITE_ONCE(kfence_enabled, false); + pr_info("KFENCE is disabled.\n"); + } *((unsigned long *)kp->arg) = num; @@ -874,6 +877,7 @@ static int kfence_enable_late(void) WRITE_ONCE(kfence_enabled, true); queue_delayed_work(system_unbound_wq, &kfence_timer, 0); + pr_info("KFENCE is re-enabled.\n"); return 0; } -- 2.25.1