From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752769AbcE0MtV (ORCPT ); Fri, 27 May 2016 08:49:21 -0400 Received: from mail-db3on0145.outbound.protection.outlook.com ([157.55.234.145]:37703 "EHLO emea01-db3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750833AbcE0MtT (ORCPT ); Fri, 27 May 2016 08:49:19 -0400 Authentication-Results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=virtuozzo.com; From: Andrey Ryabinin To: Ingo Molnar , Peter Zijlstra CC: , Andrey Ryabinin Subject: [PATCH] kernel/sysrq: reset watchdog on all CPUs while processing sysrq-w Date: Fri, 27 May 2016 15:49:54 +0300 Message-ID: <1464353394-30528-1-git-send-email-aryabinin@virtuozzo.com> X-Mailer: git-send-email 2.7.3 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [195.214.232.10] X-ClientProxiedBy: DB5PR06CA0005.eurprd06.prod.outlook.com (10.162.165.15) To AM5PR0801MB1297.eurprd08.prod.outlook.com (10.167.216.148) X-MS-Office365-Filtering-Correlation-Id: cf7cdce4-0d12-429d-c032-08d3862d4fd5 X-Microsoft-Exchange-Diagnostics: 1;AM5PR0801MB1297;2:aa6kFBAcUW+uOvKqtYsK8+44N/Uy6YQB9jLdfqGz8Oh1XairvBANkHp1HWQXMRR83dX9PKlpVB6yFlAw66tMqD37F2VEfsnpK8osoXN613VkFZTQ9bGD9pKo1Id1/7SK7EYgZJNJnHsSmHXersYu4Zjtz2cVpng2L54oOcPvQMmgOF0gbWHE/tUORPbuzYpG;3:ztSU6IiDWQAS3ZAzAh0R2FUApvWDlD8YFDknOgyvs6d7SGyWdPfl+iu2A1UEu2QmRSCipUSvfnTPOgvIOG3Bm/pfjBUUZbpcpGpzNNlGeS3GT+4vTBwTp8bBfByViMZr;25:IalsBLrhSxwbUJu0TqttQR6eWV/4JeSQrgyvyUpASsbhOMFV/NCqEYWKImoFHedhvuieVXKWGdJMbBCezCjBPyWSNFc2xGjCPKXDgTYR58YMdGca02D9W8uy8/cYPxOwC7LP/DR2OJrPvjVY91emscFIlygkPWFSxYb3hAriTebEk1m/QUsR8TL4coSobuY2Yb22kkMgNk50vMtJMH2MEF3MkwsyZ8TQFwliEpTzplX7jkMrE6xHJx7R9E43h5Bj7Wljf9lc1w63K5aaDjgg+P5h9K+JTTSIJpzVQwVpE5dFQCQic5lLE5nlYLhMG3Wzw5zaIq0v99ohZoLIzj59ad5kLI7gPBDib9GDJkU9XgwYBzI3BdYz7ZitPomKDvSGeGrx/BnQ32KO+kyYKDmcBtpfq8pjIOibA/m7NGpcc7o= X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:AM5PR0801MB1297; 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Currently we reset NMI-watchdog on the current CPU to avoid softlockup. Sometimes this doesn't work since watchdog might trigger on the other CPU which is waiting for an IPI to proceed. Reset watchdog on all CPUs to prevent spurious softlockup messages. Signed-off-by: Andrey Ryabinin --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 7f2cae4..c135eee 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5134,7 +5134,7 @@ void show_state_filter(unsigned long state_filter) * reset the NMI-timeout, listing all files on a slow * console might take a lot of time: */ - touch_nmi_watchdog(); + touch_all_softlockup_watchdogs(); if (!state_filter || (p->state & state_filter)) sched_show_task(p); } -- 2.7.3