linux-kernel - Re: 2.6.19-rt1 Bug

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Date:	Thu, 30 Nov 2006 14:06:37 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	joel silvestre <j.silvestre@...adoo.fr>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: 2.6.19-rt1 Bug




/*
 * Spinlocks are used for interfaces that can be possibly called at
 * interrupt level
 */
ACPI_EXTERN raw_spinlock_t _acpi_gbl_gpe_lock;  /* For GPE data structs and registers */ 
ACPI_EXTERN raw_spinlock_t _acpi_gbl_hardware_lock;     /* For ACPI H/W except GPE registers */

The problem is these two raw locks. There don't look like they could get
called from real interrupt context.

Daniel

On Thu, 2006-11-30 at 21:36 +0100, joel silvestre wrote:
> Hi,
> 
> comes from an Intel core duo laptop running
> kernel-rt-2.6.19-1.rt1.0001.i686.rpm on Fedora 6.
> 
> joël
> 
> Nov 30 21:24:40 localhost kernel: BUG: scheduling with irqs disabled:
> IRQ 9/0x00000001/77
> Nov 30 21:24:40 localhost kernel: caller is rt_spin_lock_slowlock
> +0x106/0x18a
> Nov 30 21:24:40 localhost kernel:  [<c0104e1b>] dump_trace+0x64/0x1cc
> Nov 30 21:24:40 localhost kernel:  [<c0104f9c>] show_trace_log_lvl
> +0x19/0x2e
> Nov 30 21:24:40 localhost kernel:  [<c01052e0>] show_trace+0x12/0x14
> Nov 30 21:24:40 localhost kernel:  [<c01052f9>] dump_stack+0x17/0x19
> Nov 30 21:24:40 localhost kernel:  [<c032c0ac>] schedule+0x71/0xe7
> Nov 30 21:24:40 localhost kernel:  [<c032cc04>] rt_spin_lock_slowlock
> +0x106/0x18a
> Nov 30 21:24:40 localhost kernel:  [<c032d0a5>] rt_spin_lock+0x20/0x22
> Nov 30 21:24:40 localhost kernel:  [<c0123267>] __wake_up+0x13/0x50
> Nov 30 21:24:40 localhost kernel:  [<c0230bd4>] acpi_ec_gpe_handler
> +0x54/0x8b
> Nov 30 21:24:40 localhost kernel:  [<c021dff5>] acpi_ev_gpe_dispatch
> +0x68/0x163
> Nov 30 21:24:40 localhost kernel:  [<c021e189>] acpi_ev_gpe_detect
> +0x99/0xe0
> Nov 30 21:24:40 localhost kernel:  [<c021c791>]
> acpi_ev_sci_xrupt_handler+0x15/0x1d
> Nov 30 21:24:40 localhost kernel:  [<c0217530>] acpi_irq+0xe/0x18
> Nov 30 21:24:40 localhost kernel:  [<c015925b>] handle_IRQ_event
> +0x45/0xc1
> Nov 30 21:24:40 localhost kernel:  [<c01598ce>] thread_simple_irq
> +0x39/0x6c
> Nov 30 21:24:40 localhost kernel:  [<c0159d11>] do_irqd+0xdd/0x298
> Nov 30 21:24:40 localhost kernel:  [<c013a8cf>] kthread+0xc2/0xef
> Nov 30 21:24:40 localhost kernel:  [<c0104b5b>] kernel_thread_helper
> +0x7/0x10
> Nov 30 21:24:40 localhost kernel:  =======================
> Nov 30 21:24:41 localhost kernel: BUG: scheduling while atomic: IRQ
> 9/0x00000001/77, CPU#1
> Nov 30 21:24:41 localhost kernel:  [<c0104e1b>] dump_trace+0x64/0x1cc
> Nov 30 21:24:41 localhost kernel:  [<c0104f9c>] show_trace_log_lvl
> +0x19/0x2e
> Nov 30 21:24:41 localhost kernel:  [<c01052e0>] show_trace+0x12/0x14
> Nov 30 21:24:41 localhost kernel:  [<c01052f9>] dump_stack+0x17/0x19
> Nov 30 21:24:41 localhost kernel:  [<c032b204>] __schedule+0x84/0xd91
> Nov 30 21:24:41 localhost kernel:  [<c032c106>] schedule+0xcb/0xe7
> Nov 30 21:24:41 localhost kernel:  [<c032cc04>] rt_spin_lock_slowlock
> +0x106/0x18a
> Nov 30 21:24:41 localhost kernel:  [<c032d0a5>] rt_spin_lock+0x20/0x22
> Nov 30 21:24:41 localhost kernel:  [<c0123267>] __wake_up+0x13/0x50
> Nov 30 21:24:41 localhost kernel:  [<c0230bd4>] acpi_ec_gpe_handler
> +0x54/0x8b
> Nov 30 21:24:41 localhost kernel:  [<c021dff5>] acpi_ev_gpe_dispatch
> +0x68/0x163
> Nov 30 21:24:41 localhost kernel:  [<c021e189>] acpi_ev_gpe_detect
> +0x99/0xe0
> Nov 30 21:24:41 localhost kernel:  [<c021c791>]
> acpi_ev_sci_xrupt_handler+0x15/0x1d
> Nov 30 21:24:41 localhost kernel:  [<c0217530>] acpi_irq+0xe/0x18
> Nov 30 21:24:41 localhost kernel:  [<c015925b>] handle_IRQ_event
> +0x45/0xc1
> Nov 30 21:24:41 localhost kernel:  [<c01598ce>] thread_simple_irq
> +0x39/0x6c
> Nov 30 21:24:41 localhost kernel:  [<c0159d11>] do_irqd+0xdd/0x298
> Nov 30 21:24:41 localhost kernel:  [<c013a8cf>] kthread+0xc2/0xef
> Nov 30 21:24:41 localhost kernel:  [<c0104b5b>] kernel_thread_helper
> +0x7/0x10
> Nov 30 21:24:41 localhost kernel:  =======================
> 
> 
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