K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2012-08-28T18:44:56.004144Z
K 7
svn:log
V 482
MFC 230782,237274:
Refine the implementation of POSIX_FADV_NOREUSE to perform
POSIX_FADV_DONTNEED requests on the currently accessed portion of the
file on each read(2) or write(2) rather than using direct I/O.  This
gives much better performance including read-ahead and write clustering
similar to normal read(2) and write(2) calls.

If subsequent read(2) and write(2) calls are sequential, then the
POSIX_FADV_DONTNEED requests will cover the entire sequentially-accessed
range.

END