From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sitsofe Wheeler Subject: [X86] Watchdog lockdep warning with next-20080529 Date: Thu, 29 May 2008 23:25:53 +0100 Message-ID: Mime-Version: 1.0 Content-Transfer-Encoding: 7Bit Return-path: Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-kernel@vger.kernel.org Cc: kernel-testers@vger.kernel.org While using linux-next-20080529 the following warning was printed: [ 1108.103357] ------------[ cut here ]------------ [ 1108.103370] WARNING: at kernel/lockdep.c:2680 check_flags+0x8a/0x12d() [ 1108.103377] Modules linked in: [ 1108.103384] Pid: 5, comm: watchdog/0 Not tainted 2.6.26-rc4-next-20080529skw #134 [ 1108.103392] [] warn_on_slowpath+0x41/0x6a [ 1108.103402] [] ? trace_hardirqs_off+0xb/0xd [ 1108.103411] [] ? trace_hardirqs_on+0xb/0xd [ 1108.103419] [] ? trace_hardirqs_on_caller+0xe8/0x124 [ 1108.103428] [] ? trace_hardirqs_on+0xb/0xd [ 1108.103436] [] ? hrtick_set+0xce/0xd6 [ 1108.103445] [] check_flags+0x8a/0x12d [ 1108.103452] [] lock_acquire+0x3b/0x89 [ 1108.103459] [] _read_lock+0x1c/0x49 [ 1108.103467] [] ? watchdog+0x97/0x1a9 [ 1108.103475] [] ? watchdog+0x0/0x1a9 [ 1108.103483] [] watchdog+0x97/0x1a9 [ 1108.103489] [] ? watchdog+0x0/0x1a9 [ 1108.103497] [] kthread+0x3b/0x63 [ 1108.103504] [] ? kthread+0x0/0x63 [ 1108.103512] [] kernel_thread_helper+0x7/0x10 [ 1108.103520] ======================= [ 1108.103525] ---[ end trace bf12fd91b8f59e65 ]--- [ 1108.103529] possible reason: unannotated irqs-on. [ 1108.103534] irq event stamp: 18 [ 1108.103538] hardirqs last enabled at (17): [] trace_hardirqs_on+0xb/0xd [ 1108.103548] hardirqs last disabled at (18): [] trace_hardirqs_off+0xb/0xd [ 1108.103558] softirqs last enabled at (0): [] copy_process+0x2dd/0xf9a [ 1108.103568] softirqs last disabled at (0): [<00000000>] 0x0 -- Sitsofe | http://sucs.org/~sits/