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Subject: Re: 2.6.14-rc4-rt7
From: Steven Rostedt <rostedt@goodmis.org>
To: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>
Cc: john stultz <johnstul@us.ibm.com>, Ingo Molnar <mingo@elte.hu>,
       Mark Knecht <markknecht@gmail.com>, Rui Nuno Capela <rncbc@rncbc.org>,
       david singleton <dsingleton@mvista.com>,
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       cc@ccrma.Stanford.EDU, William Weston <weston@lysdexia.org>
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Organization: Kihon Technologies
Date: Mon, 24 Oct 2005 16:39:19 -0400
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On Mon, 2005-10-24 at 12:38 -0700, Fernando Lopez-Lezcano wrote:
> On Mon, 2005-10-24 at 12:28 -0700, Fernando Lopez-Lezcano wrote:
> > On Sat, 2005-10-22 at 05:58 +0200, Ingo Molnar wrote: 
> > > * Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> wrote:
> > > 
> > > > Here's one with rc5-rt3:
> > 
> > rc5-rt5, _without_ HIGH_RES_TIMERS. 
> 
> Same warnings when booting into the UP kernel, so far no hang but I have
> not been logged in for long:
> 
> pci_hotplug: PCI Hot Plug PCI Core version: 0.5
> ACPI: CPU0 (power states: C1[C1])
> isapnp: Scanning for PnP cards...
> Time: tsc clocksource has been installed.
> WARNING: non-monotonic time!
> ... time warped from 452930691 to 440940768.
> udev/33[CPU#0]: BUG in ktime_get at kernel/ktimers.c:103
>  [<c012147c>] __WARN_ON+0x5c/0xa0 (8)
>  [<c0138105>] ktime_get+0xe5/0x160 (48)
>  [<c013848e>] enqueue_ktimer+0x2e/0x330 (64)
>  [<c018389f>] dput+0xef/0x220 (4)
>  [<c01388fa>] internal_restart_ktimer+0x9a/0x130 (80)
>  [<c03509a7>] schedule_ktimer+0x47/0xc0 (44)
>  [<c0350a48>] schedule_ktimer_interruptible+0x28/0x50 (20)
>  [<c0138f90>] __ktimer_nanosleep+0x40/0xe0 (24)
>  [<c017510a>] vfs_lstat+0x1a/0x50 (12)
>  [<c013906b>] ktimer_nanosleep+0x3b/0x50 (36)
>  [<c0350b50>] nanosleep_restart_mono+0x0/0x30 (8)
>  [<c0138dc0>] ktimer_wake_up+0x0/0x10 (64)
>  [<c013911c>] sys_nanosleep+0x4c/0x50 (32)
>  [<c01031fd>] syscall_call+0x7/0xb (16)
> WARNING: non-monotonic time!
> ... time warped from 452930691 to 441930456.
> softirq-timer/0/3[CPU#0]: BUG in ktime_get at kernel/ktimers.c:103
>  [<c012147c>] __WARN_ON+0x5c/0xa0 (8)
>  [<c0138105>] ktime_get+0xe5/0x160 (48)
>  [<c0138cbd>] ktimer_run_queues+0x1d/0x120 (64)
>  [<c0129ad7>] run_timer_softirq+0xc7/0x3d0 (48)
>  [<c034fd35>] schedule+0x85/0x100 (12)
>  [<c0125c27>] ksoftirqd+0xc7/0x130 (28)
>  [<c0125b60>] ksoftirqd+0x0/0x130 (32)
>  [<c0134a18>] kthread+0x98/0xa0 (8)
>  [<c0134980>] kthread+0x0/0xa0 (12)
>  [<c01013c5>] kernel_thread_helper+0x5/0x10 (12)
> WARNING: non-monotonic time!
> ... time warped from 452930691 to 442929843.
> softirq-timer/0/3[CPU#0]: BUG in ktime_get at kernel/ktimers.c:103
>  [<c012147c>] __WARN_ON+0x5c/0xa0 (8)
>  [<c0138105>] ktime_get+0xe5/0x160 (48)
>  [<c0138cbd>] ktimer_run_queues+0x1d/0x120 (64)
>  [<c011c21c>] __wake_up+0x3c/0x70 (16)
>  [<c0129ad7>] run_timer_softirq+0xc7/0x3d0 (32)
>  [<c034fd35>] schedule+0x85/0x100 (12)
>  [<c0125c27>] ksoftirqd+0xc7/0x130 (28)
>  [<c0125b60>] ksoftirqd+0x0/0x130 (32)
>  [<c0134a18>] kthread+0x98/0xa0 (8)
>  [<c0134980>] kthread+0x0/0xa0 (12)
>  [<c01013c5>] kernel_thread_helper+0x5/0x10 (12)
> isapnp: No Plug & Play device found
> Real Time Clock Driver v1.12
> Linux agpgart interface v0.101 (c) Dave Jones
> 

The above is being worked on.  John, I believe this will be solved when
we get your latest into Ingo's kernel.

> And this when starting Hydrogen for the first time (the next startup is
> fine):
> 
> hydrogen:4610 userspace BUG: scheduling in user-atomic context!
>  [<c034fd9a>] schedule+0xea/0x100 (8)
>  [<c034ff74>] wait_for_completion+0xa4/0xe0 (28)
>  [<c011c150>] default_wake_function+0x0/0x20 (12)
>  [<c0177951>] coredump_wait+0xa1/0x100 (28)
>  [<c01ec60c>] copy_from_user+0x4c/0xc0 (8)
>  [<c0177aaa>] do_coredump+0xfa/0x270 (108)
>  [<c015456d>] kmem_cache_free+0x4d/0xb0 (40)
>  [<c012aab5>] __dequeue_signal+0xf5/0x1c0 (24)
>  [<c012aba3>] dequeue_signal+0x23/0xe0 (32)
>  [<c012ca58>] get_signal_to_deliver+0x298/0x310 (20)
>                [<c0351ee0>] do_page_fault+0x0/0x590 (24)
>  [<c0102f80>] do_signal+0x70/0x180 (8)
>  [<c014f495>] free_pages_bulk+0x225/0x2a0 (28)
>  [<c0129493>] try_to_del_timer_sync+0x43/0x50 (12)
>  [<c0147735>] audit_filter_syscall+0x45/0xe0 (4)
>  [<c014834b>] audit_syscall_exit+0x4b/0x400 (36)
>  [<c035219d>] do_page_fault+0x2bd/0x590 (40)
>  [<c0351ee0>] do_page_fault+0x0/0x590 (48)
>  [<c01030b5>] do_notify_resume+0x25/0x34 (8)
>  [<c0103294>] work_notifysig+0x13/0x1b (8)
> 
> No other BUG messages that I can see.
> -- Fernando

This part is new, I'll take a look into this.

-- Steve


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