Doug / smarc-fsl-linux-kernel

05 Jan, 2009

1 commit

  • 9ea09af3b   stop_machine: introduce stop_machine_create/destroy. ... Browse Code »

    Introduce stop_machine_create/destroy. With this interface subsystems
    that need a non-failing stop_machine environment can create the
    stop_machine machine threads before actually calling stop_machine.
    When the threads aren't needed anymore they can be killed with
    stop_machine_destroy again.

    When stop_machine gets called and the threads aren't present they
    will be created and destroyed automatically. This restores the old
    behaviour of stop_machine.

    This patch also converts cpu hotplug to the new interface since it
    is special: cpu_down calls __stop_machine instead of stop_machine.
    However the kstop threads will only be created when stop_machine
    gets called.

    Changing the code so that the threads would be created automatically
    on __stop_machine is currently not possible: when __stop_machine gets
    called we hold cpu_add_remove_lock, which is the same lock that
    create_rt_workqueue would take. So the workqueue needs to be created
    before the cpu hotplug code locks cpu_add_remove_lock.

    Signed-off-by: Heiko Carstens
    Signed-off-by: Rusty Russell

    Heiko Carstens
     

01 Jan, 2009

1 commit

  • 41c7bb958   cpumask: convert rest of files in kernel/ ... Browse Code »

    Impact: Reduce stack usage, use new cpumask API.

    Mainly changing cpumask_t to 'struct cpumask' and similar simple API
    conversion. Two conversions worth mentioning:

    1) we use cpumask_any_but to avoid a temporary in kernel/softlockup.c,
    2) Use cpumask_var_t in taskstats_user_cmd().

    Signed-off-by: Rusty Russell
    Signed-off-by: Mike Travis
    Cc: Balbir Singh
    Cc: Ingo Molnar

    Rusty Russell
     

25 Aug, 2008

1 commit

28 Jul, 2008

3 commits

  • eeec4fad9   stop_machine(): stop_machine_run() changed to use cpu mask ... Browse Code »

    Instead of a "cpu" arg with magic values NR_CPUS (any cpu) and ~0 (all
    cpus), pass a cpumask_t. Allow NULL for the common case (where we
    don't care which CPU the function is run on): temporary cpumask_t's
    are usually considered bad for stack space.

    This deprecates stop_machine_run, to be removed soon when all the
    callers are dead.

    Signed-off-by: Rusty Russell

    Rusty Russell
     
  • ffdb5976c   Simplify stop_machine ... Browse Code »

    stop_machine creates a kthread which creates kernel threads. We can
    create those threads directly and simplify things a little. Some care
    must be taken with CPU hotunplug, which has special needs, but that code
    seems more robust than it was in the past.

    Signed-off-by: Rusty Russell
    Acked-by: Christian Borntraeger

    Rusty Russell
     
  • 5c2aed622   stop_machine: add ALL_CPUS option ... Browse Code »

    -allow stop_mahcine_run() to call a function on all cpus. Calling
    stop_machine_run() with a 'ALL_CPUS' invokes this new behavior.
    stop_machine_run() proceeds as normal until the calling cpu has
    invoked 'fn'. Then, we tell all the other cpus to call 'fn'.

    Signed-off-by: Jason Baron
    Signed-off-by: Mathieu Desnoyers
    Signed-off-by: Rusty Russell
    CC: Adrian Bunk
    CC: Andi Kleen
    CC: Alexey Dobriyan
    CC: Christoph Hellwig
    CC: mingo@elte.hu
    CC: akpm@osdl.org

    Jason Baron
     

26 Apr, 2006

1 commit

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds