tree 5455b42f7853317be7cafbdb42fae0f591990805
parent 2a41de48b81e61fbe260ae5031ebcb6f935f35fb
author Konrad Rzeszutek <konrad@darnok.org> 1184670236 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184692984 -0700

Inhibit NMI watchdog when Alt-SysRq-T operation is underway

On large memory configuration with not so fast CPUs the NMI watchdog is
triggered when memory addresses are being gathered and printed.  The code
paths for Alt-SysRq-t are sprinkled with touch_nmi_watchdog in various
places but not in this routine (or in the loop that utilizes this
function).  The patch has been tested for regression on large CPU+memory
configuration (128 logical CPUs + 224 GB) and 1,2,4,16-CPU sockets with
various memory sizes (1,2,4,6,20).

Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>