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+What: /sys/kernel/mm/cleancache/
+Date: April 2011
+Contact: Dan Magenheimer <dan.magenheimer@oracle.com>
+Description:
+ /sys/kernel/mm/cleancache/ contains a number of files which
+ record a count of various cleancache operations
+ (sum across all filesystems):
+ succ_gets
+ failed_gets
+ puts
+ flushes