lkml.org 
[lkml]   [2008]   [Apr]   [16]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 16 Apr 2008 15:07:25 -0400 (EDT)
FromSteven Rostedt <>
SubjectRe: [BUG/PATCH] x86 mmiotrace: dynamically disable non-boot CPUs

On Wed, 16 Apr 2008, Ingo Molnar wrote:
>
> so lets fix those preemptability bugs. They show that the
> cpu-up/cpu-down ops are called from atomic context - it should normally
> be straightforward to sort out - there's no particular reason why the
> ->open()/->close() methods of an ftrace plugin should run in atomic
> context. Steve, any ideas where the atomicity might come from?
>

They shouldn't be called in an atomic section. The only thing I do to
protect them is call mutex_lock/unlock. Those should allow preemption to
take place.

-- Steve



\
 
 \ /
  Last update: 2008-04-16 21:09    [from the cache]
©2003-2008