From: Ingo Molnar <mingo@elte.hu>
To: Mike Galbraith <efault@gmx.de>
Cc: tglx@linutronix.de, Maxim <maximlevitsky@gmail.com>,
Len Brown <lenb@kernel.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far
Date: Sun, 30 Dec 2007 15:53:04 +0100 [thread overview]
Message-ID: <20071230145304.GS16946@elte.hu> (raw)
In-Reply-To: <1199001010.5452.30.camel@homer.simson.net>
* Mike Galbraith <efault@gmx.de> wrote:
> > Is this after resume ? If yes, then something (probably BIOS) is
> > fiddling with the TSC of one CPU when the resume happens.
>
> My P4 box has the same "problem", which is remedied by..
> - start = get_cycles_sync();
> + start = last_tsc = get_cycles_sync();
this is slightly racy - your second patch that initializes things
properly is the right solution IMO. I'm wondering, if others are seeing
this too, should we make this a v2.6.24 item? It's a bit late for that i
think - although it shouldnt hurt.
Ingo
next prev parent reply other threads:[~2007-12-30 14:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-16 10:30 [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Maxim Levitsky
2007-03-16 23:19 ` Len Brown
2007-03-17 23:00 ` Maxim
2007-03-17 23:32 ` Thomas Gleixner
2007-12-30 7:50 ` Mike Galbraith
2007-12-30 14:53 ` Ingo Molnar [this message]
2007-03-20 11:54 ` sysfs ugly timer interface (was Re: [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far) Pavel Machek
2007-03-22 15:28 ` Greg KH
2007-03-22 15:41 ` Thomas Gleixner
2007-03-23 1:24 ` sysfs q [was: sysfs ugly timer interface] Jan Engelhardt
2007-03-23 4:48 ` Greg KH
2007-03-23 6:05 ` Jan Engelhardt
2007-03-16 23:39 ` [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Thomas Gleixner
2007-03-17 23:01 ` Maxim
2007-03-16 23:44 ` Thomas Gleixner
2007-03-17 0:04 ` [PATCH] i386: trust the PM-Timer calibration of the local APIC timer Thomas Gleixner
2007-03-17 7:22 ` Ingo Molnar
2007-03-17 13:24 ` Andi Kleen
2007-03-18 8:12 ` Andrew Morton
2007-03-18 8:45 ` Thomas Gleixner
2007-03-17 1:32 ` [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Len Brown
2007-03-17 9:56 ` Thomas Gleixner
2007-03-17 11:05 ` Thomas Gleixner
2007-03-17 16:52 ` Thomas Gleixner
2007-03-17 10:32 ` Arjan van de Ven
2007-03-17 13:26 ` Andi Kleen
2007-03-20 4:27 ` Greg KH
2007-03-20 6:30 ` Thomas Gleixner
2007-03-20 9:14 ` Arjan van de Ven
2007-03-20 11:36 ` Andi Kleen
2007-03-20 11:41 ` Oliver Neukum
2007-03-17 22:45 ` Maxim
2007-03-20 5:04 ` Lee Revell
2007-03-20 5:36 ` Eric St-Laurent
2007-03-20 9:15 ` Arjan van de Ven
2007-03-20 18:04 ` Andy Lutomirski
2007-03-20 22:58 ` Eric St-Laurent
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