From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthias Reichl Subject: Re: [Bug #12612] hard lockup when interrupting cdda2wav Date: Tue, 17 Feb 2009 18:16:01 +0100 Message-ID: <20090217171601.GA3351@horus.com> References: Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Kernel Testers List , FUJITA Tomonori The bug is still present in 2.6.28.5: ============================================= [ INFO: possible recursive locking detected ] 2.6.28.5-dbg #1 --------------------------------------------- swapper/0 is trying to acquire lock: (&q->__queue_lock){.+..}, at: [] blk_put_request+0x25/0x60 but task is already holding lock: (&q->__queue_lock){.+..}, at: [] blk_end_io+0x5a/0xa0 other info that might help us debug this: 1 lock held by swapper/0: #0: (&q->__queue_lock){.+..}, at: [] blk_end_io+0x5a/0xa0 stack backtrace: Pid: 0, comm: swapper Not tainted 2.6.28.5-dbg #1 Call Trace: [] __lock_acquire+0x1797/0x1930 [] error_exit+0x29/0xa9 [] sg_rq_end_io+0x0/0x2e0 [] lock_acquire+0x9a/0xe0 [] blk_put_request+0x25/0x60 [] _spin_lock_irqsave+0x43/0x90 [] blk_put_request+0x25/0x60 [] blk_put_request+0x25/0x60 [] sg_finish_rem_req+0xa4/0x100 [] sg_rq_end_io+0x278/0x2e0 [] end_that_request_last+0x61/0x260 [] blk_end_io+0x68/0xa0 [] scsi_end_request+0x41/0xd0 [] scsi_io_completion+0x130/0x470 [] blk_done_softirq+0x75/0x90 [] __do_softirq+0x9b/0x180 [] native_sched_clock+0x13/0x70 [] call_softirq+0x1c/0x30 [] do_softirq+0x65/0xa0 [] irq_exit+0xa5/0xb0 [] do_IRQ+0x107/0x1d0 [] ret_from_intr+0x0/0xf [] mwait_idle+0x56/0x60 [] mwait_idle+0x4d/0x60 [] cpu_idle+0x63/0xc0