lkml.org 
[lkml]   [2010]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subjectpercpu: implement nommu support
    Date
    Hello,

    This patchset implements nommu support in percpu allocator. Chunk
    alloc/free/(de)populate codes are separated into a separate file so
    that different flavor can be included depending on configuration. The
    default vmalloc area based version now lives in percpu-vm.c and the
    new kernel memory based one lives in percpu-km.c and can be selected
    by CONFIG_NEED_PER_CPU_KM.

    percpu-km allocates each chunk as contigus area in kernel memory using
    alloc_pages(). For details on usage and limitations, please read the
    patch description and comment in mm/percpu-km.c.

    This patchset contains the following five patches.

    0001-percpu-factor-out-pcpu_addr_in_first-reserved_chunk-.patch
    0002-percpu-reorganize-chunk-creation-and-destruction.patch
    0003-percpu-misc-preparations-for-nommu-support.patch
    0004-percpu-move-vmalloc-based-chunk-management-into-perc.patch
    0005-percpu-implement-kernel-memory-based-chunk-allocatio.patch

    0001-0003 prepare for future changes - factor things out, relocate,
    clean up.

    0004 separates out the default vmalloc based chunk management into
    percpu-vm.c.

    0005 implements percpu-km.c.

    The following git branch contains these patches.

    git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git nommu

    I've tested percpu-km on x86_64 w/ configuration and percpu init code
    massged. Sonic Zhang tested it on blackfin and reports it works fine
    there too (Sonic, please base further tests on these new patches).
    I'll wait several days for review and further test results and then
    push these patches to linux-next.

    This patchset contains the following changes.

    mm/percpu-km.c | 104 ++++++++++
    mm/percpu-vm.c | 451 ++++++++++++++++++++++++++++++++++++++++++++
    mm/percpu.c | 584 ++++++++++-----------------------------------------------
    3 files changed, 664 insertions(+), 475 deletions(-)

    Thanks.

    --
    tejun


    \
     
     \ /
      Last update: 2010-04-08 06:15    [W:0.042 / U:33.288 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site