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[PATCH] x86-64: Inhibit machine from asserting an NMI when doing Alt-SysRq-M operation.
authorKonrad Rzeszutek <konrad@darnok.org>
Wed, 2 May 2007 17:27:11 +0000 (19:27 +0200)
committerAndi Kleen <andi@basil.nowhere.org>
Wed, 2 May 2007 17:27:11 +0000 (19:27 +0200)
commitae32b1297a77c23fd0badd642bb685062f7a37f8
treeb0af833455b81fc743e5b79789b25f7ba9cbde61tree | snapshot (tar.gz zip)
parentc8118c6c07f2edfd697aaa0b93e08c3b65a5a675commit | diff
[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>
arch/x86_64/mm/init.c diff | blob | blame | history