Locate and fix an XFS bug in RHEL 6.4

Issue on github:

Https://github.com/facebook/flashcache/issues/113

The redhat bug report requires the permission to view ):

Https://bugzilla.redhat.com/show_bug.cgi? Id = 956947

This bug was introduced in Versions later than kernel 2.6.32-279.22. When flashcache is used, if the file system is XFS, the core dump and system restart occur frequently, with a probability, the system crashes after dozens of seconds of startup.

Downgrade the system to 2.6.32-279 and restore the system to normal. Currently, this problem exists in the RedHat and CentOS 6 systems. In the latest kernel 2.6.32-358.11.1, the problem still exists.

After analysis, the problem location has been determined and the kernel has been corrected. Currently, it has been running stably for two months. Some other users have used the kernel after my patch, and the problem has been fixed.

Red Hat in # bz938547, confirm the problem and have fixed it in the internal version kernel-2.6.32-387.el6. This issue will be officially fixed in the next official release of the kernel.