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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-18 18:10:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-18 18:10:49 +0300
commitd6a24d0640d609138a4e40a4ce9fd9fe7859e24c (patch)
treeaa40fb7f5d03dc605634fb4030afd8798bd6bc0b /Documentation/vm
parent1f5014d6a77513fa7cefe30eb7791d5856c04384 (diff)
parent197175427a221fe3200f7727ea35e261727e7228 (diff)
downloadlinux-d6a24d0640d609138a4e40a4ce9fd9fe7859e24c.tar.xz
Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6
Pull documentation updates from Jonathan Corbet: "Numerous fixes, the overdue removal of the i2o docs, some new Chinese translations, and, hopefully, the README fix that will end the flow of identical patches to that file" * tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (34 commits) Documentation/memcg: update memcg/kmem status Documentation: blackfin: Makefile: Typo building issue Documentation/vm/pagemap.txt: correct location of page-types tool Documentation/memory-barriers.txt: typo fix doc: Add guest_nice column to example output of `cat /proc/stat' Documentation/kernel-parameters: Move "eagerfpu" to its right place Documentation: gpio: Update ACPI part of the document to mention _DSD docs/completion.txt: Various tweaks and corrections doc: completion: context, scope and language fixes Documentation:Update Documentation/zh_CN/arm64/memory.txt Documentation:Update Documentation/zh_CN/arm64/booting.txt Documentation: Chinese translation of arm64/legacy_instructions.txt DocBook media: fix broken EIA hyperlink Documentation: tweak the maintainers entry README: Change gzip/bzip2 to xz compression format README: Update version number reference doc:pci: Fix typo in Documentation/PCI Documentation: drm: Use '->' when describing access through pointers. Documentation: Remove mentioning of block barriers Documentation/email-clients.txt: Fix one grammar mistake, add extra info about TB ...
Diffstat (limited to 'Documentation/vm')
-rw-r--r--Documentation/vm/pagemap.txt3
-rw-r--r--Documentation/vm/transhuge.txt11
2 files changed, 13 insertions, 1 deletions
diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt
index 6fbd55ef6b45..6bfbc172cdb9 100644
--- a/Documentation/vm/pagemap.txt
+++ b/Documentation/vm/pagemap.txt
@@ -131,7 +131,8 @@ Short descriptions to the page flags:
13. SWAPCACHE page is mapped to swap space, ie. has an associated swap entry
14. SWAPBACKED page is backed by swap/RAM
-The page-types tool in this directory can be used to query the above flags.
+The page-types tool in the tools/vm directory can be used to query the
+above flags.
Using pagemap to do something useful:
diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
index 6b31cfbe2a9a..8143b9e8373d 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