02 Dec, 2009

1 commit

• 1786bf009   core: Clean up user return notifers use of per_cpu ... Browse Code »

  Instead of using per_cpu(..., raw_smp_processor_id()), use
  __get_cpu_var(...).

  Signed-off-by: Avi Kivity
  LKML-Reference:
  Signed-off-by: Ingo Molnar

  Avi Kivity

  2009-12-02 17:22:59 +0800  

02 Nov, 2009

1 commit

• 3c912b6ed   x86: Fix user return notifier put_cpu_var() invocation ... Browse Code »

  Today's linux-next build (x86_64 allmodconfig) failed like this:

  kernel/user-return-notifier.c: In function
  'fire_user_return_notifiers': kernel/user-return-notifier.c:45:
  error: expected expression before ')' token

  Introduced by commit 7c68af6e32c73992bad24107311f3433c89016e2
  ("core, x86: Add user return notifiers") from the tip and kvm trees
  but revealed by commit e0fdb0e050eae331046385643618f12452aa7e73
  ("percpu: add __percpu for sparse") from the percpu tree.

  Before that percpu tree commit, "put_cpu_var()" would compile
  without error (even though it really needs a parameter).

  Signed-off-by: Stephen Rothwell
  Cc: Avi Kivity
  Cc: Peter Zijlstra
  Cc: Tejun Heo
  Cc: Rusty Russell
  Cc: Christoph Lameter
  LKML-Reference:
  Signed-off-by: Ingo Molnar

  Stephen Rothwell

  2009-11-02 14:58:59 +0800  

02 Oct, 2009

1 commit

• 7c68af6e3   core, x86: Add user return notifiers ... Browse Code »

  Add a general per-cpu notifier that is called whenever the kernel is
  about to return to userspace. The notifier uses a thread_info flag
  and existing checks, so there is no impact on user return or context
  switch fast paths.

  This will be used initially to speed up KVM task switching by lazily
  updating MSRs.

  Signed-off-by: Avi Kivity
  LKML-Reference:
  Signed-off-by: H. Peter Anvin

  Avi Kivity

  2009-10-02 03:12:18 +0800