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Date: Mon, 29 Dec 2003 12:16:22 -0800 (PST)
From: John Hawkes <hawkes@google.engr.sgi.com>
Message-Id: <200312292016.MAA01670@google.engr.sgi.com>
To: Andrew Morton <akpm@osdl.org>, John Hawkes <hawkes@google.engr.sgi.com>,
       "Martin J. Bligh" <mbligh@aracnet.com>
Subject: Re: [Lse-tech] Re: [RFC][PATCH] 2.6.0-test11 sched_clock() broken for
    "drifty ITC"
Cc: johnstul@us.ibm.com, linux-kernel@vger.kernel.org, mingo@elte.hu,
       lse-tech@lists.sourceforge.net
References: <200312182044.hBIKiCLY5477429@babylon.engr.sgi.com>
    <200312291851.KAA25312@google.engr.sgi.com>
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> [ Martin Bligh writes: ]
> Is there any harm in dropping the first part of your patch, ie.
...
> > diff -X /home/hawkes/Patches/ignore.dirs -Naur linux-2.6.0/arch/i386/kernel/timers/timer_tsc.c linux-2.6.0-schedclock2/arch/i386/kernel/timers/timer_tsc.c
...
> and leaving the rest of it? the CONFIG_NUMA affects both NUMA-Q and Summit,
> BTW, which uses the cyclone timer, so it gets even more complex ;-)

No, no harm.  Leaving out that timer_tsc.c part means only that i386
CONFIG_NUMA continues to use "jiffies" as the timebase, which is a
low-resolution timebase and may affect the quality of some of the
interactive scheduling decisions.

John Hawkes