open calls on raw devices much slower after updating to RHEL 6.3 kernel-2.6.32-279.19.1.el6 or RHEL 6.4 kernel-2.6.32-358.el6

Solution Verified - Updated -

Issue

  • After installation of the RHEL6 kernel-2.6.32-279.19.1 and higher, raw device I/O is very slow.

Environment

  • Red Hat Enterprise Linux (RHEL) 6.3, 6.4

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