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Message-ID: <CAOdLEaqkpKzbJY33jakQQpqvFtwtVP4wgNAB=r6VA9Xnd5k-yA@mail.gmail.com> Date: Thu, 30 Aug 2012 15:01:10 -0700 From: Sam Gandhi <samgandhi9@...il.com> To: linux-kernel@...r.kernel.org Subject: Continuous warn slow path warning messages from top of the kernel tree I am using the latest git repo (3.6.-rc3) to boot my ARM mx28 based board. When I boot this board via nfs I see continuous messages shown below. I looked at ip_auto_config net/ipv4/ipconfig.c and I don't see explicit prink() call although there are DBG() or pr_info/pr_err calls but I thought those functions were slow path safe? I was wondering if this some new regression that anybody else has seen? -Sam --- [ 4.180000] device=eth0, addr=192.168.137.1, mask=255.255.255.0, gw=192.168.137.254 [ 4.180000] Dumping ftrace buffer: [ 4.180000] (ftrace buffer empty) [ 4.180000] ------------[ cut here ]------------ [ 4.180000] WARNING: at /src/git/kernel/kernel/rcutiny.c:135 rcu_idle_exit_common+0x88/0xa0() [ 4.180000] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper [ 4.180000] Modules linked in: [ 4.180000] [<c0014fec>] (unwind_backtrace+0x0/0xf0) from [<c001eb80>] (warn_slowpath_common+0x4c/0x64) [ 4.180000] [<c001eb80>] (warn_slowpath_common+0x4c/0x64) from [<c001ec2c>] (warn_slowpath_fmt+0x30/0x40) [ 4.180000] [<c001ec2c>] (warn_slowpath_fmt+0x30/0x40) from [<c0076908>] (rcu_idle_exit_common+0x88/0xa0) [ 4.180000] [<c0076908>] (rcu_idle_exit_common+0x88/0xa0) from [<c0076a24>] (rcu_irq_enter+0x40/0x7c) [ 4.180000] [<c0076a24>] (rcu_irq_enter+0x40/0x7c) from [<c0027584>] (irq_enter+0x8/0x64) [ 4.180000] [<c0027584>] (irq_enter+0x8/0x64) from [<c000fe94>] (handle_IRQ+0x18/0x84) [ 4.180000] [<c000fe94>] (handle_IRQ+0x18/0x84) from [<c000ec54>] (__irq_svc+0x34/0x58) [ 4.180000] [<c000ec54>] (__irq_svc+0x34/0x58) from [<c0021588>] (vprintk_emit+0x134/0x504) [ 4.180000] [<c0021588>] (vprintk_emit+0x134/0x504) from [<c03ff59c>] (printk+0x34/0x44) [ 4.180000] [<c03ff59c>] (printk+0x34/0x44) from [<c05925e8>] (ip_auto_config+0xda0/0xf4c) [ 4.180000] [<c05925e8>] (ip_auto_config+0xda0/0xf4c) from [<c0008870>] (do_one_initcall+0x30/0x16c) [ 4.180000] [<c0008870>] (do_one_initcall+0x30/0x16c) from [<c0576828>] (kernel_init+0xf0/0x1b8) [ 4.180000] [<c0576828>] (kernel_init+0xf0/0x1b8) from [<c000ff90>] (kernel_thread_exit+0x0/0x8) [ 4.180000] ---[ end trace 837047ef750231b9 ]--- [ 4.340000] ------------[ cut here ]------------ [ 4.340000] WARNING: at /src/git/kernel/kernel/rcutiny.c:75 rcu_idle_enter_common.clone.6+0x9c/0x) [ 4.340000] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper [ 4.340000] Modules linked in: [ 4.340000] [<c0014fec>] (unwind_backtrace+0x0/0xf0) from [<c001eb80>] (warn_slowpath_common+0x4c/0x64) [ 4.340000] [<c001eb80>] (warn_slowpath_common+0x4c/0x64) from [<c001ec2c>] (warn_slowpath_fmt+0x30/0x40) [ 4.340000] [<c001ec2c>] (warn_slowpath_fmt+0x30/0x40) from [<c0076ba4>] (rcu_idle_enter_common.clone.6+0x) [ 4.340000] [<c0076ba4>] (rcu_idle_enter_common.clone.6+0x9c/0xb8) from [<c0076bfc>] (rcu_irq_exit+0x3c/0x) [ 4.340000] [<c0076bfc>] (rcu_irq_exit+0x3c/0x78) from [<c000feb0>] (handle_IRQ+0x34/0x84) [ 4.340000] [<c000feb0>] (handle_IRQ+0x34/0x84) from [<c000ec54>] (__irq_svc+0x34/0x58) [ 4.340000] [<c000ec54>] (__irq_svc+0x34/0x58) from [<c0021588>] (vprintk_emit+0x134/0x504) [ 4.340000] [<c0021588>] (vprintk_emit+0x134/0x504) from [<c03ff59c>] (printk+0x34/0x44) [ 4.340000] [<c03ff59c>] (printk+0x34/0x44) from [<c05925e8>] (ip_auto_config+0xda0/0xf4c) [ 4.340000] [<c05925e8>] (ip_auto_config+0xda0/0xf4c) from [<c0008870>] (do_one_initcall+0x30/0x16c) [ 4.340000] [<c0008870>] (do_one_initcall+0x30/0x16c) from [<c0576828>] (kernel_init+0xf0/0x1b8) [ 4.340000] [<c0576828>] (kernel_init+0xf0/0x1b8) from [<c000ff90>] (kernel_thread_exit+0x0/0x8) [ 4.340000] ---[ end trace 837047ef750231ba ]--- [ 4.470000] host=192.168.137.1, domain=, nis-domain=(none) [ 4.480000] bootserver=255.255.255.255, rootserver=192.168.137.254, rootpath= [ 4.490000] ------------[ cut here ]------------ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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