Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: suspend-related lockdep warning | Date | Wed, 28 Nov 2007 23:06:45 +0100 |
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On Wednesday, 28 of November 2007, Andrew Morton wrote: > > 2.6.24-rc3-mm2 (which will be released if it boots on two more machines and > if I stay awake) will say this during suspend-to-RAM on the Vaio: > > [ 91.876445] Syncing filesystems ... done. > [ 92.382595] Freezing user space processes ... WARNING: at kernel/lockdep.c:2662 check_flags() > [ 92.384000] Pid: 1925, comm: dbus-daemon Not tainted 2.6.24-rc3-mm2 #32 > [ 92.384177] [<c0104a74>] show_trace_log_lvl+0x12/0x25 > [ 92.384335] [<c01052ff>] show_trace+0xd/0x10 > [ 92.384469] [<c01059be>] dump_stack+0x55/0x5d > [ 92.384605] [<c0136a29>] check_flags+0x7f/0x11a > [ 92.384746] [<c0139cfb>] lock_acquire+0x3a/0x86 > [ 92.384886] [<c031f4de>] _spin_lock+0x26/0x53
I guess this is the task_lock() in refrigerator().
If that is the case, I don't understand this trace at all.
> [ 92.385023] [<c0141d3b>] refrigerator+0x13/0xc8 > [ 92.385163] [<c01274c8>] get_signal_to_deliver+0x32/0x3fb > [ 92.385326] [<c01030f4>] do_notify_resume+0x8c/0x699 > [ 92.385476] [<c0103c18>] work_notifysig+0x13/0x1b > [ 92.385620] ======================= > [ 92.385719] irq event stamp: 309 > [ 92.385809] hardirqs last enabled at (309): [<c0103c79>] syscall_exit_work+0x11/0x26 > [ 92.386045] hardirqs last disabled at (308): [<c0103b42>] syscall_exit+0x14/0x25 > [ 92.386265] softirqs last enabled at (0): [<c011bea5>] copy_process+0x374/0x130e > [ 92.386491] softirqs last disabled at (0): [<00000000>] 0x0 > [ 92.392457] (elapsed 0.00 seconds) done. > [ 92.392581] Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done. > [ 92.392882] PM: Entering mem sleep > [ 92.392974] Suspending console(s) > > this has been happening for quite some time and might even be happening in > mainline. > > Also, a few seconds after resume has completed we get a whimper from the > hangcheck driver: > > [ 1.762425] usb 2-1: configuration #1 chosen from 1 choice > [ 1.826548] input: Microsoft Microsoft Wireless Optical Mouse_ 1.00 as /class/input/input9 > [ 1.866211] input: USB HID v1.11 Mouse [Microsoft Microsoft Wireless Optical Mouse_ 1.00] on usb-0000:00:1d.1-1 > [ 5.757927] Hangcheck: hangcheck value past margin! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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