Eric Lee / smarc-fsl-linux-kernel

26 Jul, 2008

1 commit

  • 628f42355   memcg: limit change shrink usage ... Browse Code »

    Shrinking memory usage at limit change.

    [akpm@linux-foundation.org: coding-style fixes]
    Acked-by: Balbir Singh
    Acked-by: Pavel Emelyanov
    Signed-off-by: KAMEZAWA Hiroyuki
    Cc: Paul Menage
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    KAMEZAWA Hiroyuki
     

05 Jul, 2008

1 commit

  • d823f6bfe   devcgroup: fix odd behaviour when writing 'a' to devices.allow ... Browse Code »

    # cat /devcg/devices.list
    a *:* rwm
    # echo a > devices.allow
    # cat /devcg/devices.list
    a *:* rwm
    a 0:0 rwm

    This is odd and maybe confusing. With this patch, writing 'a' to
    devices.allow will add 'a *:* rwm' to the whitelist.

    Also a few fixes and updates to the document.

    Signed-off-by: Li Zefan
    Cc: Pavel Emelyanov
    Cc: Serge E. Hallyn
    Cc: Paul Menage
    Cc: Balbir Singh
    Cc: James Morris
    Cc: Chris Wright
    Cc: Stephen Smalley
    Cc: KAMEZAWA Hiroyuki
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Li Zefan
     

29 Apr, 2008

2 commits

  • faebe9fdf   memcgroups: add a document describing the resource counter abstraction ... Browse Code »

    The resource counter is supposed to facilitate the resource accounting of
    arbitrary resource (and it already does this for memory controller).

    However, it is about to be used in other resources controllers (swap, kernel
    memory, networking, etc), so provide a doc describing how to work with it.
    This will eliminate all the possible future duplications in the appropriate
    controllers' docs.

    Fixed errors pointed out by Randy.

    [akpm@linux-foundation.org: fix documentation tpyo]
    Signed-off-by: Pavel Emelyanov
    Cc: Randy Dunlap
    Cc: Balbir Singh
    Cc: KAMEZAWA Hiroyuki
    Cc: Li Zefan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Emelyanov
     
  • 08ce5f16e   cgroups: implement device whitelist ... Browse Code »

    Implement a cgroup to track and enforce open and mknod restrictions on device
    files. A device cgroup associates a device access whitelist with each cgroup.
    A whitelist entry has 4 fields. 'type' is a (all), c (char), or b (block).
    'all' means it applies to all types and all major and minor numbers. Major
    and minor are either an integer or * for all. Access is a composition of r
    (read), w (write), and m (mknod).

    The root device cgroup starts with rwm to 'all'. A child devcg gets a copy of
    the parent. Admins can then remove devices from the whitelist or add new
    entries. A child cgroup can never receive a device access which is denied its
    parent. However when a device access is removed from a parent it will not
    also be removed from the child(ren).

    An entry is added using devices.allow, and removed using
    devices.deny. For instance

    echo 'c 1:3 mr' > /cgroups/1/devices.allow

    allows cgroup 1 to read and mknod the device usually known as
    /dev/null. Doing

    echo a > /cgroups/1/devices.deny

    will remove the default 'a *:* mrw' entry.

    CAP_SYS_ADMIN is needed to change permissions or move another task to a new
    cgroup. A cgroup may not be granted more permissions than the cgroup's parent
    has. Any task can move itself between cgroups. This won't be sufficient, but
    we can decide the best way to adequately restrict movement later.

    [akpm@linux-foundation.org: coding-style fixes]
    [akpm@linux-foundation.org: fix may-be-used-uninitialized warning]
    Signed-off-by: Serge E. Hallyn
    Acked-by: James Morris
    Looks-good-to: Pavel Emelyanov
    Cc: Daniel Hokka Zakrisson
    Cc: Li Zefan
    Cc: Paul Menage
    Cc: Balbir Singh
    Cc: KAMEZAWA Hiroyuki
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Serge E. Hallyn
     

05 Mar, 2008

2 commits

24 Feb, 2008

1 commit

  • 2324c5dd4   memcgroup: fix and update documentation ... Browse Code »

    - remove trailing " Bytes"s in the demonstration
    - remove section 4.4 (feature control_type has been removed)
    - fix reference section

    Signed-off-by: Li Zefan
    Acked-by: KAMEZAWA Hiroyuki
    Acked-by: Balbir Singh
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Li Zefan
     

08 Feb, 2008

3 commits

  • dfc05c259   update Documentation/controller/memory.txt ... Browse Code »

    Documentation updates for memory controller.

    Signed-off-by: KAMEZAWA Hiroyuki
    Reviewed-by: Balbir Singh
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    KAMEZAWA Hiroyuki
     
  • 0eea10301   Memory controller improve user interface ... Browse Code »

    Change the interface to use bytes instead of pages. Page sizes can vary
    across platforms and configurations. A new strategy routine has been added
    to the resource counters infrastructure to format the data as desired.

    Suggested by David Rientjes, Andrew Morton and Herbert Poetzl

    Tested on a UML setup with the config for memory control enabled.

    [kamezawa.hiroyu@jp.fujitsu.com: possible race fix in res_counter]
    Signed-off-by: Balbir Singh
    Signed-off-by: Pavel Emelianov
    Cc: Paul Menage
    Cc: Peter Zijlstra
    Cc: "Eric W. Biederman"
    Cc: Nick Piggin
    Cc: Kirill Korotaev
    Cc: Herbert Poetzl
    Cc: David Rientjes
    Cc: Vaidyanathan Srinivasan
    Signed-off-by: KAMEZAWA Hiroyuki
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Balbir Singh
     
  • 1b6df3aa4   Memory controller: add document ... Browse Code »

    Signed-off-by: Balbir Singh
    Cc: Pavel Emelianov
    Cc: Paul Menage
    Cc: Peter Zijlstra
    Cc: "Eric W. Biederman"
    Cc: Nick Piggin
    Cc: Kirill Korotaev
    Cc: Herbert Poetzl
    Cc: David Rientjes
    Cc: Vaidyanathan Srinivasan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Balbir Singh