linux-kernel - Re: [PATCH -rt DO NOT APPLY] Fix for tg3 networking lockup

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Date:	Thu, 03 Aug 2006 17:25:29 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Theodore Tso <tytso@....edu>, David Miller <davem@...emloft.net>,
	mchan@...adcom.com, herbert@...dor.apana.org.au,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH -rt DO NOT APPLY] Fix for tg3 networking lockup

Theodore Tso wrote:
> Removing the timer-based "ping" might be a good thing to do from the
> point of view of reducing power utilization of laptops (but hey, I
> don't have a tg3 in my laptop, so I won't worry about it a whole lot :-), 
> but I agree that in general the RT patches need to be able to
> call functions such as tg3_timer() reliably even when under a high
> real-time process workload, without needing to use the blunt hammer of
> "chrt -f 95 `pidof softirq-timer`".  (Since not all timer callbacks
> need to be run at rt prio 95.)
> 

I suppose the timer subsystem needs a "I'd like to have this timer called at time X, but it's ok to call it
later until time X+Y" option; that's useful for RT like stuff but also for power savings...
(eg you can batch timer firings that way a lot better)
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