From mboxrd@z Thu Jan 1 00:00:00 1970 From: u.kleine-koenig@pengutronix.de (Uwe =?iso-8859-1?Q?Kleine-K=F6nig?=) Date: Tue, 4 Feb 2014 13:58:39 +0100 Subject: 'unannotated irqs-on' lockdep warning In-Reply-To: References: <20140130155741.GB15937@n2100.arm.linux.org.uk> Message-ID: <20140204125839.GC26766@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Feb 04, 2014 at 11:02:16AM +0100, Christian Gmeiner wrote: > Hi > > 2014-01-30 Russell King - ARM Linux : > > On Thu, Jan 30, 2014 at 03:31:46PM +0100, Christian Gmeiner wrote: > >> [ 19.859234] CPU: 0 PID: 1848 Comm: mkdir Not tainted 3.12.4 #44 > >> [ 19.865190] [] (unwind_backtrace+0x0/0xe0) from > >> [] (show_stack+0x10/0x14) > >> [ 19.873739] [] (show_stack+0x10/0x14) from [] > >> (dump_stack+0x64/0xa4) > >> [ 19.881851] [] (dump_stack+0x64/0xa4) from [] > >> (warn_slowpath_common+0x64/0x84) > >> [ 19.890828] [] (warn_slowpath_common+0x64/0x84) from > >> [] (warn_slowpath_fmt+0x2c/0x3c) > >> [ 19.900413] [] (warn_slowpath_fmt+0x2c/0x3c) from > >> [] (check_flags.part.26+0xb4/0x1e4) > >> [ 19.910001] [] (check_flags.part.26+0xb4/0x1e4) from > >> [] (lock_release+0x3c/0x100) > >> [ 19.919243] [] (lock_release+0x3c/0x100) from > >> [] (lg_local_unlock+0x18/0x6c) > >> [ 19.928055] [] (lg_local_unlock+0x18/0x6c) from > >> [] (free_fs_struct+0x18/0x30) > >> [ 19.936947] [] (free_fs_struct+0x18/0x30) from > >> [] (do_exit+0x2ac/0x3f0) > >> [ 19.945316] [] (do_exit+0x2ac/0x3f0) from [] > >> (do_group_exit+0x88/0xb4) > >> [ 19.953596] [] (do_group_exit+0x88/0xb4) from > >> [] (__wake_up_parent+0x0/0x18) > >> [ 19.962391] ---[ end trace 98a70b5cdc7b49fe ]--- > >> [ 19.967017] possible reason: unannotated irqs-on. > >> [ 19.971729] irq event stamp: 2910 > >> [ 19.975050] hardirqs last enabled at (2909): [] > >> __slab_free+0x1c0/0x390 > >> [ 19.982661] hardirqs last disabled at (2910): [] > >> __dabt_svc+0x34/0x60 > > > > So, I wonder how we got from __dabt_svc to __wake_up_parent. It looks > > like the unwinder has failed to do a proper job of unwinding, which > > makes this undebuggable. > > > > Can you rebuild in ARM mode with frame pointers enabled please? > > > > Maybe i am blind but I can not find that option via make menuconfig. hmmm config FRAME_POINTER bool depends on !THUMB2_KERNEL default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER so disable THUMB2_KERNEL and ARM_UNWIND. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-K?nig | Industrial Linux Solutions | http://www.pengutronix.de/ |