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Re: SMTC support status in latest git head.

To: Anoop P A <anoop.pa@gmail.com>
Subject: Re: SMTC support status in latest git head.
From: "Kevin D. Kissell" <kevink@paralogos.com>
Date: Wed, 12 Jan 2011 23:53:28 -0800
Cc: STUART VENTERS <stuart.venters@adtran.com>, "Anoop P.A." <Anoop_P.A@pmc-sierra.com>, linux-mips@linux-mips.org
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References: <8F242B230AD6474C8E7815DE0B4982D7179FB88F@EXV1.corp.adtran.com> <1293470392.27661.202.camel@paanoop1-desktop> <1293524389.27661.210.camel@paanoop1-desktop> <4D19A31E.1090905@paralogos.com> <1293798476.27661.279.camel@paanoop1-desktop> <4D1EE913.1070203@paralogos.com> <1294067561.27661.293.camel@paanoop1-desktop> <4D21F5D3.50604@paralogos.com> <1294082426.27661.330.camel@paanoop1-desktop> <4D22D7B3.2050609@paralogos.com> <1294146165.27661.361.camel@paanoop1-desktop> <1294151822.27661.375.camel@paanoop1-desktop> <4D235717.1000603@paralogos.com> <1294163657.27661.386.camel@paanoop1-desktop> <4D2367EE.7000702@paralogos.com> <1294233097.27661.391.camel@paanoop1-desktop> <4D24C525.5000306@paralogos.com> <1294345396.27661.422.camel@paanoop1-desktop> <4D2650D6.4030102@paralogos.com> <1294387019.27661.458.camel@paanoop1-desktop> <4D2B5E46.3070609@paralogos.com>
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Further interesting data point:

If I specify "nowait" on the command line, I get much better behavior on
the 2.6.36 and 2.6.37 kernels.  In particular, 2.6.37, which hung after
the "Switching to clocksource MIPS" even booting with a single TC, gets
far enough to enable swap space even with 4 TCs running.  I note that
there was historically a problem with getting SMTC to work with the
wait-with-interrupts-disabled idle wait mode.  I had it working back in
2.5.2x, but something seems to have gotten broken in that 2.6.32 to
2.6.36 interval...

            Regards,

            Kevin K.

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