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Message-Id: <1424986476-6438-1-git-send-email-ebru.akagunduz@gmail.com> Date: Thu, 26 Feb 2015 23:34:36 +0200 From: Ebru Akagunduz <ebru.akagunduz@...il.com> To: linux-mm@...ck.org Cc: riel@...hat.com, mgorman@...e.de, hughd@...gle.com, kirill.shutemov@...ux.intel.com, akpm@...ux-foundation.org, dave@...olabs.net, aulmcquad@...il.com, sasha.levin@...cle.com, xemul@...allels.com, linux-kernel@...r.kernel.org, Ebru Akagunduz <ebru.akagunduz@...il.com> Subject: [PATCH] doc: add information about max_ptes_none max_ptes_none specifies how many extra small pages (that are not already mapped) can be allocated when collapsing a group of small pages into one large page. /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none A higher value leads to use additional memory for programs. A lower value leads to gain less thp performance. Value of max_ptes_none can waste cpu time very little, you can ignore it. Signed-off-by: Ebru Akagunduz <ebru.akagunduz@...il.com> Reviewed-by: Rik van Riel <riel@...hat.com> --- Documentation/vm/transhuge.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt index 6b31cfb..8143b9e 100644 --- a/Documentation/vm/transhuge.txt +++ b/Documentation/vm/transhuge.txt @@ -159,6 +159,17 @@ for each pass: /sys/kernel/mm/transparent_hugepage/khugepaged/full_scans +max_ptes_none specifies how many extra small pages (that are +not already mapped) can be allocated when collapsing a group +of small pages into one large page. + +/sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none + +A higher value leads to use additional memory for programs. +A lower value leads to gain less thp performance. Value of +max_ptes_none can waste cpu time very little, you can +ignore it. + == Boot parameter == You can change the sysfs boot time defaults of Transparent Hugepage -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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