* [PATCH] doc: add information about max_ptes_none
@ 2015-02-26 21:34 ` Ebru Akagunduz
0 siblings, 0 replies; 6+ messages in thread
From: Ebru Akagunduz @ 2015-02-26 21:34 UTC (permalink / raw)
To: linux-mm
Cc: riel, mgorman, hughd, kirill.shutemov, akpm, dave, aulmcquad,
sasha.levin, xemul, linux-kernel, Ebru Akagunduz
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@gmail.com>
Reviewed-by: Rik van Riel <riel@redhat.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
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH] doc: add information about max_ptes_none
@ 2015-02-26 21:34 ` Ebru Akagunduz
0 siblings, 0 replies; 6+ messages in thread
From: Ebru Akagunduz @ 2015-02-26 21:34 UTC (permalink / raw)
To: linux-mm
Cc: riel, mgorman, hughd, kirill.shutemov, akpm, dave, aulmcquad,
sasha.levin, xemul, linux-kernel, Ebru Akagunduz
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@gmail.com>
Reviewed-by: Rik van Riel <riel@redhat.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
--
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^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] doc: add information about max_ptes_none
2015-02-26 21:34 ` Ebru Akagunduz
@ 2015-02-27 22:14 ` Jonathan Corbet
-1 siblings, 0 replies; 6+ messages in thread
From: Jonathan Corbet @ 2015-02-27 22:14 UTC (permalink / raw)
To: Ebru Akagunduz
Cc: linux-mm, riel, mgorman, hughd, kirill.shutemov, akpm, dave,
aulmcquad, sasha.levin, xemul, linux-kernel
On Thu, 26 Feb 2015 23:34:36 +0200
Ebru Akagunduz <ebru.akagunduz@gmail.com> wrote:
> 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.
Applied to the docs tree, thanks.
jon
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] doc: add information about max_ptes_none
@ 2015-02-27 22:14 ` Jonathan Corbet
0 siblings, 0 replies; 6+ messages in thread
From: Jonathan Corbet @ 2015-02-27 22:14 UTC (permalink / raw)
To: Ebru Akagunduz
Cc: linux-mm, riel, mgorman, hughd, kirill.shutemov, akpm, dave,
aulmcquad, sasha.levin, xemul, linux-kernel
On Thu, 26 Feb 2015 23:34:36 +0200
Ebru Akagunduz <ebru.akagunduz@gmail.com> wrote:
> 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.
Applied to the docs tree, thanks.
jon
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] doc: add information about max_ptes_none
2015-02-27 22:14 ` Jonathan Corbet
@ 2015-03-02 12:56 ` Sasha Levin
-1 siblings, 0 replies; 6+ messages in thread
From: Sasha Levin @ 2015-03-02 12:56 UTC (permalink / raw)
To: Jonathan Corbet, Ebru Akagunduz
Cc: linux-mm, riel, mgorman, hughd, kirill.shutemov, akpm, dave,
aulmcquad, xemul, linux-kernel
On 02/27/2015 05:14 PM, Jonathan Corbet wrote:
>> Value of max_ptes_none can waste cpu time very little, you can
>> ignore it.
This phrase could use rewording I think.
Thanks,
Sasha
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] doc: add information about max_ptes_none
@ 2015-03-02 12:56 ` Sasha Levin
0 siblings, 0 replies; 6+ messages in thread
From: Sasha Levin @ 2015-03-02 12:56 UTC (permalink / raw)
To: Jonathan Corbet, Ebru Akagunduz
Cc: linux-mm, riel, mgorman, hughd, kirill.shutemov, akpm, dave,
aulmcquad, xemul, linux-kernel
On 02/27/2015 05:14 PM, Jonathan Corbet wrote:
>> Value of max_ptes_none can waste cpu time very little, you can
>> ignore it.
This phrase could use rewording I think.
Thanks,
Sasha
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-03-02 13:05 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-02-26 21:34 [PATCH] doc: add information about max_ptes_none Ebru Akagunduz
2015-02-26 21:34 ` Ebru Akagunduz
2015-02-27 22:14 ` Jonathan Corbet
2015-02-27 22:14 ` Jonathan Corbet
2015-03-02 12:56 ` Sasha Levin
2015-03-02 12:56 ` Sasha Levin
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