Re: 2.6.14-rc4-rt7

From: Rui Nuno Capela
Date: Thu Oct 27 2005 - 03:01:35 EST


Steven Rostedt wrote:

On Wed, 26 Oct 2005, Rui Nuno Capela wrote:


Just noticed a couple or more of this on dmesg. Maybe its old news and being discussed already. Otherwise my P4@xxxxxxx/UP laptop boots and runs without hicups on 2.6.14-rc5-rt7 (config.gz attached).

... time warped from 13551912584 to 13551905960.
... system time: 13488892865 .. 13488892865.
udevstart/1579[CPU#0]: BUG in get_monotonic_clock_ts at kernel/time/timeofday.c:
262
[<c0116fcb>] __WARN_ON+0x4f/0x6c (8)
[<c012f8b0>] get_monotonic_clock_ts+0x27a/0x2f0 (40)
[<c0141c9d>] kmem_cache_alloc+0x51/0xac (76)
[<c0114826>] copy_process+0x2ff/0xeed (44)
[<c0139444>] unlock_page+0x17/0x4a (12)
[<c0147a8a>] do_wp_page+0x245/0x372 (20)
[<c01154f5>] do_fork+0x69/0x1b5 (56)
[<c02c120b>] do_page_fault+0x432/0x543 (32)
[<c01017aa>] sys_clone+0x32/0x36 (72)
[<c0102a9b>] sysenter_past_esp+0x54/0x75 (16)

>>[...]

Also, Rui, do they show up at different times or clustered together?
(William, I see your output is clustered) The reason I asked, is that
the test may produce more than one warning message for the same time
warp. Since the time used to check for the time warp is not updated if
time goes backwards, so if you call the this routine more than once
before the time warp catches back up, it will warn again.


Don't really know if its consistent, but it does occur on several times, on only on boot.

Sorry for the delay.
--
rncbc aka Rui Nuno Capela
rncbc@xxxxxxxxx


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