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Message-ID: <20110613060453.GA21778@hexapodia.org> Date: Sun, 12 Jun 2011 23:04:53 -0700 From: Andy Isaacson <adi@...apodia.org> To: Ben Hutchings <bhutchings@...arflare.com> Cc: "Paul E. McKenney" <paulmck@...ibm.com>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, linux-pm@...ts.linux-foundation.org Subject: Re: rcu_sched_state detected stall on CPU 0, 3.0-rc2 On Sun, Jun 12, 2011 at 10:30:05PM -0400, Ben Hutchings wrote: > > Of course now that I'm trying to debug, I am seeing many successful > > suspend-resume cycles. I don't see any signs of difference between the > > cases that hung and the cases that are now succeeding. > > > > CCing netdev, because I suspend by running pm-suspend, and in at least > > one failure, an ethtool running under pm-suspend seemed to be the > > problem: > > > > root 11558 pts/8 S+ \_ /bin/sh /usr/lib/pm-utils/sleep.d/00powers > > root 11559 pts/8 S+ \_ /bin/sh /usr/sbin/pm-powersave > > root 11576 pts/8 S+ \_ /bin/sh /usr/lib/pm-utils/power.d/ > > root 11577 pts/8 D+ \_ ethtool -s eth0 wol g > [...] > > Wake-on-LAN configuration is entirely handled by the relevant driver; > the ethtool core just copies the parameters in and out. It looks like > there is some sort of deadlock or missing unlock in the driver. So my > question would be which driver is running eth0? I attached the whole gzipped dmesg, but anyways, it's e1000e: [ 1.168733] e1000e: Intel(R) PRO/1000 Network Driver - 1.3.10-k2 [ 1.168879] e1000e: Copyright(c) 1999 - 2011 Intel Corporation. [ 1.169346] e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 [ 1.169494] e1000e 0000:00:19.0: setting latency timer to 64 [ 1.169603] usbcore: registered new interface driver usbfs [ 1.169675] e1000e 0000:00:19.0: irq 40 for MSI/MSI-X [ 1.169794] usbcore: registered new interface driver hub [ 1.181231] usbcore: registered new device driver usb [ 1.181879] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 1.190984] thermal LNXTHERM:00: registered as thermal_zone0 [ 1.191129] ACPI: Thermal Zone [THM0] (48 C) [ 1.205191] SCSI subsystem initialized [ 1.207349] libata version 3.00 loaded. [ 1.352926] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:26:2d:f3:14:0f [ 1.353243] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 1.353473] e1000e 0000:00:19.0: eth0: MAC: 9, PHY: 10, PBA No: A002FF-0FF [snip] [ 1221.836727] PM: Entering mem sleep [ 1221.836855] Suspending console(s) (use no_console_suspend to debug) [ 1222.018735] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 1222.063181] sd 0:0:0:0: [sda] Stopping disk [ 1222.272665] ehci_hcd 0000:00:1d.0: PCI INT D disabled [ 1222.272668] ehci_hcd 0000:00:1a.0: PCI INT D disabled [ 1222.304428] i915 0000:00:02.0: power state changed by ACPI to D3 [ 1222.378384] e1000e 0000:00:19.0: PCI INT A disabled [ 1222.378393] e1000e 0000:00:19.0: PME# enabled [ 1222.378400] e1000e 0000:00:19.0: wake-up capability enabled by ACPI ethtool does show up in the failure dmesg: [56520.872462] INFO: task ethtool:18105 blocked for more than 120 seconds. [56520.872465] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [56520.872468] ethtool D 7fffffffffffffff 0 18105 18104 0x00000000 [56520.872473] ffff880105d99ad8 0000000000000082 ffffffff810d0c05 ffff880137d15730 [56520.872479] ffff880130fd3780 ffff880105d99fd8 ffff880105d99fd8 0000000000012500 [56520.872485] ffff8801333794d0 ffff880130fd3780 ffff880105d99fd8 ffff880137ffbe00 [56520.872490] Call Trace: [56520.872499] [<ffffffff810d0c05>] ? zone_statistics+0x7c/0x83 [56520.872504] [<ffffffff8131c13e>] schedule_timeout+0x34/0xde [56520.872509] [<ffffffff8131bef8>] wait_for_common+0xa3/0x11a [56520.872514] [<ffffffff8103c393>] ? try_to_wake_up+0x1ac/0x1ac [56520.872519] [<ffffffff8131c023>] wait_for_completion+0x1d/0x1f [56520.872524] [<ffffffff8109557d>] synchronize_sched+0x5a/0x5c [56520.872528] [<ffffffff8105beac>] ? find_ge_pid+0x41/0x41 [56520.872536] [<ffffffff8122f67a>] wakeup_source_remove+0x60/0x64 [56520.872541] [<ffffffff8122f785>] wakeup_source_unregister+0x13/0x1f [56520.872546] [<ffffffff8122f7f1>] device_wakeup_disable+0x60/0x6b [56520.872550] [<ffffffff8122f942>] device_set_wakeup_enable+0x2d/0x2f [56520.872573] [<ffffffffa003a56a>] e1000_set_wol+0x9b/0x9f [e1000e] [56520.872580] [<ffffffff81261c8e>] dev_ethtool+0x338/0x1c06 [56520.872585] [<ffffffff810d4be4>] ? __do_fault+0x313/0x34a [56520.872591] [<ffffffff810329ef>] ? should_resched+0xe/0x2d [56520.872595] [<ffffffff8131be41>] ? _cond_resched+0xe/0x22 [56520.872600] [<ffffffff8126019d>] dev_ioctl+0x503/0x688 [56520.872605] [<ffffffff81319009>] ? __slab_alloc+0x330/0x342 [56520.872610] [<ffffffff8124ac72>] ? sock_alloc_inode+0x24/0xb7 [56520.872615] [<ffffffff8124b0c2>] sock_do_ioctl+0x3b/0x46 [56520.872619] [<ffffffff8124b4f1>] sock_ioctl+0x20d/0x21b [56520.872625] [<ffffffff810feb02>] ? get_empty_filp+0x93/0x11b [56520.872630] [<ffffffff8110b218>] do_vfs_ioctl+0x460/0x4a1 [56520.872635] [<ffffffff8124ca82>] ? sock_alloc_file+0xb3/0x114 [56520.872640] [<ffffffff8131d13e>] ? _raw_spin_lock+0xe/0x10 [56520.872646] [<ffffffff810fc23d>] ? fd_install+0x31/0x5d [56520.872650] [<ffffffff8110b2a0>] sys_ioctl+0x47/0x6b [56520.872655] [<ffffffff8131ddc2>] system_call_fastpath+0x16/0x1b -andy -- 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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