tree b0af833455b81fc743e5b79789b25f7ba9cbde61
parent c8118c6c07f2edfd697aaa0b93e08c3b65a5a675
author Konrad Rzeszutek <konrad@darnok.org> 1178126831 +0200
committer Andi Kleen <andi@basil.nowhere.org> 1178126831 +0200

[PATCH] x86-64: Inhibit machine from asserting an NMI when doing Alt-SysRq-M operation.

This patch touches the NMI watchdog every MAX_ORDER_NR_PAGES
to inhibit the machine from triggering an NMI while the CPUs
are locked. This situation is happening on boxes with more
than 64CPUs and 128GB of RAM when Alt-SysRq-m is performed.

It has been succesfully tested for regression on uni, 2, 4, 8
32, and 64 CPU boxes with various memory configuration.

Signed-off-by: Andi Kleen <ak@suse.de>