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Linux Stop Flushing of mmaped Pages To Disk

How can I stop the flushing of mmaped pages to disk in Linux?
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Linux Log All SCSI Events To Syslog

How can I log all SCSI events to syslog system under CentOS or Fedora or RHEL or Red hat Linux operating systems?
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I would like to dynamically enable or disable a CPU on a running system. How do I hotplug a CPU on a running Linux system? How do I disable cpu cores on a Linux operating system at run time?
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