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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-18 11:10:49 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-18 11:10:49 -0400 |
commit | d6a24d0640d609138a4e40a4ce9fd9fe7859e24c (patch) | |
tree | aa40fb7f5d03dc605634fb4030afd8798bd6bc0b /Documentation/vm | |
parent | 1f5014d6a77513fa7cefe30eb7791d5856c04384 (diff) | |
parent | 197175427a221fe3200f7727ea35e261727e7228 (diff) | |
download | lwn-d6a24d0640d609138a4e40a4ce9fd9fe7859e24c.tar.gz lwn-d6a24d0640d609138a4e40a4ce9fd9fe7859e24c.zip |
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.txt | 3 | ||||
-rw-r--r-- | Documentation/vm/transhuge.txt | 11 |
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 |