Eric Lee / smarc-fsl-linux-kernel

17 Jul, 2007

2 commits

  • b4ef0296f   percpu_counters: use for_each_online_cpu() ... Browse Code »

    Now that we have implemented hotunplug-time counter spilling,
    percpu_counter_sum() only needs to look at online CPUs.

    Cc: Gautham R Shenoy
    Cc: Oleg Nesterov
    Cc: Peter Zijlstra
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     
  • c67ad917c   percpu_counters(): use cpu notifiers ... Browse Code »

    per-cpu counters presently must iterate over all possible CPUs in the
    exhaustive percpu_counter_sum().

    But it can be much better to only iterate over the presently-online CPUs. To
    do this, we must arrange for an offlined CPU's count to be spilled into the
    counter's central count.

    We can do this for all percpu_counters in the machine by linking them into a
    single global list and walking that list at CPU_DEAD time.

    (I hope. Might have race windows in which the percpu_counter_sum() count is
    inaccurate?)

    Cc: Gautham R Shenoy
    Cc: Oleg Nesterov
    Cc: Peter Zijlstra
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

23 Jun, 2006

2 commits

  • 0216bfcff   [PATCH] percpu counter data type changes to suppport more than 2**31 ext3 free blocks counter ... Browse Code »

    The percpu counter data type are changed in this set of patches to support
    more users like ext3 who need more than 32 bit to store the free blocks
    total in the filesystem.

    - Generic perpcu counters data type changes. The size of the global counter
    and local counter were explictly specified using s64 and s32. The global
    counter is changed from long to s64, while the local counter is changed from
    long to s32, so we could avoid doing 64 bit update in most cases.

    - Users of the percpu counters are updated to make use of the new
    percpu_counter_init() routine now taking an additional parameter to allow
    users to pass the initial value of the global counter.

    Signed-off-by: Mingming Cao
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mingming Cao
     
  • 3cbc56402   [PATCH] percpu_counters: create lib/percpu_counter.c ... Browse Code »

    - Move percpu_counter routines from mm/swap.c to lib/percpu_counter.c

    Signed-off-by: Ravikiran Thirumalai
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ravikiran G Thirumalai