Re: [patch 1/1] cpufreq_conservative/ondemand: invert meaning of 'ignore nice'
From: Con Kolivas
Date: Mon Nov 21 2005 - 21:31:42 EST
On Tue, 22 Nov 2005 01:22 pm, Dave Jones wrote:
> On Tue, Nov 22, 2005 at 01:21:18AM +0000, Ken Moffat wrote:
> > On Mon, 21 Nov 2005, Alexander Clouter wrote:
> > >The use of the 'ignore_nice' sysfs file is confusing to anyone using
> > > it. This
> > >removes the sysfs file 'ignore_nice' and in its place creates a
> > >'ignore_nice_load' entry which defaults to '1'; meaning nice'd
> > > processes are
> > >not counted towards the 'business' calculation.
> > >
> > >WARNING: this obvious breaks any userland tools that expected
> > > ignore_nice' to
> > >exist, to draw attention to this fact it was concluded on the mailing
> > > list that the entry should be removed altogether so the userland app
> > > breaks and so
> > >the author can build simple to detect workaround. Having said that it
> > >seems
> > >currently very few tools even make use of this functionality; all I
> > > could find was a Gentoo Wiki entry.
> > >
> > >Signed-off-by: Alexander Clouter <alex-kernel@xxxxxxxxxxxxx>
> > Great. I get to rewrite my initscript for the ondemand governor to
> > test for yet another kernel version, and write a 0 to yet another sysfs
> > file, just so that any compile I start in an xterm on my desktop box can
> > make the processor work for its living.
> > Just what have you cpufreq guys got against nice'd processes ? It's
> > enough to drive a man to powernowd ;)
> The opinion on this one started out with everyone saying "Yeah,
> this is dumb, and should have changed". Now that the change appears
> in a mergable patch, the opinion seems to have swung the other way.
> I'm seriously rethinking this change, as no matter what we do,
> we're going to make some people unhappy, so changing the status quo
> seems ultimately pointless.
Eh? I thought he was agreeing with niced processes running full speed but that
he misunderstood that that was the new default. Oh well I should have just
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