From: Martin Schwidefsky Date: Mon, 5 Feb 2007 20:18:19 +0000 (+0100) Subject: [S390] ETR support. X-Git-Tag: v2.6.21-rc1~92^2~41^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d54853ef8cb17296ac7bce9c77430fb7c80532d0;p=pandora-kernel.git [S390] ETR support. This patch adds support for clock synchronization to an external time reference (ETR). The external time reference sends an oscillator signal and a synchronization signal every 2^20 microseconds to keep the TOD clocks of all connected servers in sync. For availability two ETR units can be connected to a machine. If the clock deviates for more than the sync-check tolerance all cpus get a machine check that indicates that the clock is out of sync. For the lovely details how to get the clock back in sync see the code below. Signed-off-by: Martin Schwidefsky --- Reading git-diff-tree failed