x86: stop nmi softlockup warnings in show_mem()
When dumping memory via sysrq-m it is possible to take a bogus NMI watchdog or softlockup watchdog because the dump can take a long time on big memory systems. Occasionally tickle the watchdog when doing the dump. Signed-off-by: NPrarit Bhargava <prarit@redhat.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
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