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From: Karsten Wiese <fzu@wemgehoertderstaat.de>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: 2.6.20-rc6-mm3
Date: Thu, 1 Mar 2007 12:11:08 +0100
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Cc: Andrew Morton <akpm@osdl.org>, Maciej Rutecki <maciej.rutecki@gmail.com>,
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References: <20070129204528.eb8d695e.akpm@osdl.org> <20070201080108.GC14378@elte.hu> <200702011144.43774.fzu@wemgehoertderstaat.de>
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Am Donnerstag, 1. Februar 2007 11:44 schrieb Karsten Wiese:
> I think the wait is caused by an interrupt starting somewhere under
> sysdev_resume(void).
> possibly lapic timer interrupt? Will try to trace that.

Some evidence:
[root@a64 Desktop]# echo reboot > /sys/power/disk
[root@a64 Desktop]# cat /proc/interrupts; echo disk > /sys/power/state ; cat /proc/interrupts
<snip>
LOC:    2215504
<snip, cmos clock untouched>
LOC:    2216432
<snip>
[root@a64 Desktop]# cat /proc/interrupts; echo disk > /sys/power/state ; cat /proc/interrupts
<snip>
LOC:    2225752
<snip, cmos clock advanced by 1 month under biossettings>
LOC:    2238383
<snip>

      Karsten


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