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authorHugh Dickins <hugh.dickins@tiscali.co.uk>2009-09-21 17:02:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:32 -0700
commit2ffd8679c8e4ec226718bff58b50b226dd477015 (patch)
tree5e58b19da86defa012613a850c6f57dd69ab51f3 /Documentation/vm
parent1c2fb7a4c2ca7a958b02bc1e615d0254990bba8d (diff)
ksm: sysfs and defaults
At present KSM is just a waste of space if you don't have CONFIG_SYSFS=y to provide the /sys/kernel/mm/ksm files to tune and activate it. Make KSM depend on SYSFS? Could do, but it might be better to provide some defaults so that KSM works out-of-the-box, ready for testers to madvise MADV_MERGEABLE, even without SYSFS. Though anyone serious is likely to want to retune the numbers to their taste once they have experience; and whether these settings ever reach 2.6.32 can be discussed along the way. Save 1kB from tiny kernels by #ifdef'ing the SYSFS side of it. Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Acked-by: Izik Eidus <ieidus@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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