Documentation/vm/zswap.txt: update with same-value filled page feature
Update zswap document with details on same-value filled pages identification feature. The usage of zswap.same_filled_pages_enabled module parameter is explained. Link: http://lkml.kernel.org/r/20171206114852epcms5p6973b02a9f455d5d3c765eafda0fe2631@epcms5p6Signed-off-by: NSrividya Desireddy <srividya.dr@samsung.com> Acked-by: NDan Streetman <ddstreet@ieee.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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