linux-toradex.git/Documentation/memory-hotplug.txt, branch v4.12-rc1

scripts/spelling.txt: add "followings" pattern and fix typo instances

2017-02-28T02:43:47+00:00

Fix typos and add the following to the scripts/spelling.txt:

  followings||following

While we are here, add a missing colon in the boilerplate in DT binding
documents.  The "you SoC" in allwinner,sunxi-pinctrl.txt was fixed as
well.

I reworded "as the followings:" to "as follows:" for
drivers/usb/gadget/udc/renesas_usb3.c.

Link: http://lkml.kernel.org/r/1481573103-11329-32-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

docs: fix locations of several documents that got moved

2016-10-24T10:12:35+00:00

The previous patch renamed several files that are cross-referenced
along the Kernel documentation. Adjust the links to point to
the right places.

Signed-off-by: Mauro Carvalho Chehab

memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE

2016-05-20T02:12:14+00:00

This patchset continues the work I started with commit 31bc3858ea3e
("memory-hotplug: add automatic onlining policy for the newly added
memory").

Initially I was going to stop there and bring the policy setting logic
to userspace.  I met two issues on this way:

 1) It is possible to have memory hotplugged at boot (e.g.  with QEMU).
    These blocks stay offlined if we turn the onlining policy on by
    userspace.

 2) My attempt to bring this policy setting to systemd failed, systemd
    maintainers suggest to change the default in kernel or ...  to use
    tmpfiles.d to alter the policy (which looks like a hack to me):
        https://github.com/systemd/systemd/pull/2938

Here I suggest to add a config option to set the default value for the
policy and a kernel command line parameter to make the override.

This patch (of 2):

Introduce config option to set the default value for memory hotplug
onlining policy (/sys/devices/system/memory/auto_online_blocks).  The
reason one would want to turn this option on are to have early onlining
for hotpluggable memory available at boot and to not require any
userspace actions to make memory hotplug work.

[akpm@linux-foundation.org: tweak Kconfig text]
Signed-off-by: Vitaly Kuznetsov 
Cc: Jonathan Corbet 
Cc: Dan Williams 
Cc: "Kirill A. Shutemov" 
Cc: Mel Gorman 
Cc: David Vrabel 
Cc: David Rientjes 
Cc: Igor Mammedov 
Cc: Lennart Poettering 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

memory-hotplug: add automatic onlining policy for the newly added memory

2016-03-15T23:55:16+00:00

Currently, all newly added memory blocks remain in 'offline' state
unless someone onlines them, some linux distributions carry special udev
rules like:

  SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online"

to make this happen automatically.  This is not a great solution for
virtual machines where memory hotplug is being used to address high
memory pressure situations as such onlining is slow and a userspace
process doing this (udev) has a chance of being killed by the OOM killer
as it will probably require to allocate some memory.

Introduce default policy for the newly added memory blocks in
/sys/devices/system/memory/auto_online_blocks file with two possible
values: "offline" which preserves the current behavior and "online"
which causes all newly added memory blocks to go online as soon as
they're added.  The default is "offline".

Signed-off-by: Vitaly Kuznetsov 
Reviewed-by: Daniel Kiper 
Cc: Jonathan Corbet 
Cc: Greg Kroah-Hartman 
Cc: Daniel Kiper 
Cc: Dan Williams 
Cc: Tang Chen 
Cc: David Vrabel 
Acked-by: David Rientjes 
Cc: Naoya Horiguchi 
Cc: Xishi Qiu 
Cc: Mel Gorman 
Cc: "K. Y. Srinivasan" 
Cc: Igor Mammedov 
Cc: Kay Sievers 
Cc: Konrad Rzeszutek Wilk 
Cc: Boris Ostrovsky 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mem-hotplug: fix typo in Documentation/memory-hotplug.txt

2015-03-20T13:41:55+00:00

Fix a trivial typo in Documentation/memory-hotplug.txt.

Signed-off-by: Sheng Yong 
Signed-off-by: Jonathan Corbet

Doc/memory-hotplug.txt: corrections and callback function prototype

2015-02-27T22:05:08+00:00

Documentation/memory-hotplug.txt describes that a callback function can
be added to the notification chain by calling hotplug_memory_notifier().
The function prototype of the callback function is mssing. This missing
information is added by the patch.

The description of the arguments of the callback function is
reworked.

The constants for the event types are corrected.

The possible return values are explained.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Jonathan Corbet

memory-hotplug: add sysfs valid_zones attribute

2014-10-10T02:25:52+00:00

Currently memory-hotplug has two limits:

1. If the memory block is in ZONE_NORMAL, you can change it to
   ZONE_MOVABLE, but this memory block must be adjacent to ZONE_MOVABLE.

2. If the memory block is in ZONE_MOVABLE, you can change it to
   ZONE_NORMAL, but this memory block must be adjacent to ZONE_NORMAL.

With this patch, we can easy to know a memory block can be onlined to
which zone, and don't need to know the above two limits.

Updated the related Documentation.

[akpm@linux-foundation.org: use conventional comment layout]
[akpm@linux-foundation.org: fix build with CONFIG_MEMORY_HOTREMOVE=n]
[akpm@linux-foundation.org: remove unused local zone_prev]
Signed-off-by: Zhang Zhen 
Cc: Dave Hansen 
Cc: David Rientjes 
Cc: Toshi Kani 
Cc: Yasuaki Ishimatsu 
Cc: Naoya Horiguchi 
Cc: Wang Nan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm, hotplug: probe interface is available on several platforms

2014-06-23T23:47:43+00:00

Documentation/memory-hotplug.txt incorrectly states that the memory
driver "probe" interface is only supported on powerpc and is vague about
its application on x86.  Clarify the platforms that make this interface
available if memory hotplug is enabled.

Signed-off-by: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

memory-hotplug: update documentation to hide information about SECTIONS and remove end_phys_index

2014-06-04T23:53:58+00:00

Seems we all agree that information about SECTION, e.g. section size,
sections per memory block should be kept as kernel internals, and not
exposed to userspace.

This patch updates Documentation/memory-hotplug.txt to refer to memory
blocks instead of memory sections where appropriate and added a
paragraph to explain that memory blocks are made of memory sections.
The documentation update is mostly provided by Nathan.

Also, as end_phys_index in code is actually not the end section id, but
the end memory block id, which should always be the same as phys_index.
So it is removed here.

Signed-off-by: Li Zhong 
Reviewed-by: Zhang Yanfei 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-09-06T16:36:28+00:00

Pull trivial tree from Jiri Kosina:
 "The usual trivial updates all over the tree -- mostly typo fixes and
  documentation updates"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (52 commits)
  doc: Documentation/cputopology.txt fix typo
  treewide: Convert retrun typos to return
  Fix comment typo for init_cma_reserved_pageblock
  Documentation/trace: Correcting and extending tracepoint documentation
  mm/hotplug: fix a typo in Documentation/memory-hotplug.txt
  power: Documentation: Update s2ram link
  doc: fix a typo in Documentation/00-INDEX
  Documentation/printk-formats.txt: No casts needed for u64/s64
  doc: Fix typo "is is" in Documentations
  treewide: Fix printks with 0x%#
  zram: doc fixes
  Documentation/kmemcheck: update kmemcheck documentation
  doc: documentation/hwspinlock.txt fix typo
  PM / Hibernate: add section for resume options
  doc: filesystems : Fix typo in Documentations/filesystems
  scsi/megaraid fixed several typos in comments
  ppc: init_32: Fix error typo "CONFIG_START_KERNEL"
  treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks
  page_isolation: Fix a comment typo in test_pages_isolated()
  doc: fix a typo about irq affinity
  ...