[RFC PATCH 3/3] doc: add information about min_ptes_young

[Ebru Akagunduz <ebru.akagunduz@gmail.com>]

min_ptes_young specifies at least how many young pages needed
to create a THP. This threshold also effects when making swapin
readahead (if needed) to create a THP. We decide whether to make
swapin readahed wortwhile looking the value.

/sys/kernel/mm/transparent_hugepage/khugepaged/min_ptes_young

Signed-off-by: Ebru Akagunduz <ebru.akagunduz@gmail.com>
---
 Documentation/vm/transhuge.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
index 2ec6adb..0ae713b 100644
--- a/Documentation/vm/transhuge.txt
+++ b/Documentation/vm/transhuge.txt
@@ -193,6 +193,13 @@ memory. A lower value can prevent THPs from being
 collapsed, resulting fewer pages being collapsed into
 THPs, and lower memory access performance.
 
+min_ptes_young specifies at least how many young pages needed
+to create a THP. This threshold also effects when making swapin
+readahead (if needed) to create a THP. We decide whether to make
+swapin readahed wortwhile looking the value.
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/min_ptes_young
+
 == Boot parameter ==
 
 You can change the sysfs boot time defaults of Transparent Hugepage
-- 
1.9.1

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