Red Hat Bugzilla – Bug 641458
vmstat incorrectly reports disk IO as swap in [rhel-6.0.z]
Last modified: 2013-01-09 18:13:13 EST
This bug has been copied from bug #636978 and has been proposed
to be backported to 6.0 z-stream (EUS).
Verified in kernel-2.6.32-71.6.1.el6.ppc64.
No issue on x86_64 system with kernel 2.6.32-23.el6.x86_64
Verified in kernel-2.6.32-71.8.1.el6.s390x.
Verified in kernel-2.6.32-71.8.1.el6.i686.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
Previously, the vmstat (virtual memory statistics) tool incorrectly reported the disk I/O as swap-in on ppc64 and other architectures that do not support the TRANSPARENT_HUGEPAGE configuration option in the kernel. With this update, the vmstat tool no longer reports incorrect statistics and works as expected.