From: Daniel Walker <dwalker@mvista.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH -rt] disconnect warp check from hrtimers
Date: Wed, 27 Dec 2006 09:53:30 -0800 [thread overview]
Message-ID: <1167242010.14081.31.camel@imap.mvista.com> (raw)
In-Reply-To: <20061227173957.GA18900@elte.hu>
On Wed, 2006-12-27 at 18:39 +0100, Ingo Molnar wrote:
> * Daniel Walker <dwalker@mvista.com> wrote:
>
> > These calls were getting inconsistent wrt. the xtime_lock. The
> > xtime_lock should be held when doing the warp check update, and
> > interrupts should be off.
>
> thanks, applied. Does this solve some warnings that you saw trigger?
I saw some unexplained time warping while using the source at this url,
http://www.atnf.csiro.au/people/rgooch/benchmarks/linux-scheduler.html
it was on an older 2.6.18 based -rt .. The system would print the time
warp warning, then hang .. I applied something similar to the patch I
just sent, and the time warp warning was gone but the system still hung.
New -rt version don't hang, and I don't see the warning .. However, I
suspect the time warp warning was a side effect of the hang..
The system hang was resolved by changing the irq threads to all prio
50 ..
Daniel
next prev parent reply other threads:[~2006-12-27 17:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-27 17:28 Daniel Walker
2006-12-27 17:39 ` Ingo Molnar
2006-12-27 17:53 ` Daniel Walker [this message]
2006-12-27 18:04 ` Daniel Walker
2006-12-27 18:36 ` Daniel Walker
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