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Date: Sat, 11 Jun 2016 22:16:01 +0300 From: Ebru Akagunduz <ebru.akagunduz@...il.com> To: linux-mm@...ck.org Cc: hughd@...gle.com, riel@...hat.com, akpm@...ux-foundation.org, kirill.shutemov@...ux.intel.com, n-horiguchi@...jp.nec.com, aarcange@...hat.com, iamjoonsoo.kim@....com, gorcunov@...nvz.org, linux-kernel@...r.kernel.org, mgorman@...e.de, rientjes@...gle.com, vbabka@...e.cz, aneesh.kumar@...ux.vnet.ibm.com, hannes@...xchg.org, mhocko@...e.cz, boaz@...xistor.com, Ebru Akagunduz <ebru.akagunduz@...il.com> Subject: [RFC PATCH 3/3] doc: add information about min_ptes_young 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@...il.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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