linux-kernel - Re: [RFC][PATCH 0/3] sched: skip_clock

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Message-ID: <1420454949.5266.138.camel@marge.simpson.net>
Date:	Mon, 05 Jan 2015 11:49:09 +0100
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...nel.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: [RFC][PATCH 0/3] sched: skip_clock_update madness

On Mon, 2015-01-05 at 11:18 +0100, Peter Zijlstra wrote: 
> Hi,
> 
> So the big lockup thread got me looking at the skip_clock_update stuff again
> and here's what I came up with.
> 
> It seems to build a kernel without generating lockdep splats.
> 
> Mike can you see if it cures the wobblies you were seeing?

Nope, those hiccups were production IO beasts from hell staying in the
kernel for ages at a time.  Watchdog being falsely credited with what is
usually dinky wakeup -> switch delta throttled it effectively forever.

-Mike  


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