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x86, UV: Fix RTC latency bug by reading replicated cachelines
authorDimitri Sivanich <sivanich@sgi.com>
Fri, 22 Jan 2010 15:41:40 +0000 (09:41 -0600)
committerIngo Molnar <mingo@elte.hu>
Wed, 27 Jan 2010 10:33:53 +0000 (11:33 +0100)
For SGI UV node controllers (HUB) rev 2.0 or greater, use
replicated cachelines to read the RTC timer.  This optimization
allows faster simulataneous reads from a given socket.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100122154140.GB4975@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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