K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2013-02-13T15:09:16.517335Z
K 7
svn:log
V 258
Make the F_READAHEAD option to fcntl(2) work as documented:  a value of zero
now disables read-ahead.  It used to effectively restore the system default
readahead hueristic if it had been changed; a negative value now restores
the default.

Reviewed by:	kib

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