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Commit e369fde1 authored by David Rientjes's avatar David Rientjes Committed by Linus Torvalds
Browse files

thp: fix khugepaged defrag tunable documentation 



Commit e27e6151 ("mm/thp: use conventional format for boolean
attributes") changed

  /sys/kernel/mm/transparent_hugepage/khugepaged/defrag

to be tuned by using 1 (enabled) or 0 (disabled) instead of "yes" and
"no", respectively.

Update the documentation.

Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a7f4d00a

Documentation/vm/transhuge.txt

+4 −3
Original line number Diff line number Diff line
@@ -123,10 +123,11 @@ be automatically shutdown if it's set to "never". 
khugepaged runs usually at low frequency so while one may not want to

invoke defrag algorithms synchronously during the page faults, it

should be worth invoking defrag at least in khugepaged. However it's

also possible to disable defrag in khugepaged:

also possible to disable defrag in khugepaged by writing 0 or enable

defrag in khugepaged by writing 1:



echo yes >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag

echo no >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag

echo 0 >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag

echo 1 >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag



You can also control how many pages khugepaged should scan at each

pass: