• L
    Merge branch 'for-3.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup · 6111da34
    Linus Torvalds 提交于
    Pull cgroup fixes from Tejun Heo:
     "This is quite late but these need to be backported anyway.
    
      This is the fix for a long-standing cpuset bug which existed from
      2009.  cpuset makes use of PF_SPREAD_{PAGE|SLAB} flags to modify the
      task's memory allocation behavior according to the settings of the
      cpuset it belongs to; unfortunately, when those flags have to be
      changed, cpuset did so directly even whlie the target task is running,
      which is obviously racy as task->flags may be modified by the task
      itself at any time.  This obscure bug manifested as corrupt
      PF_USED_MATH flag leading to a weird crash.
    
      The bug is fixed by moving the flag to task->atomic_flags.  The first
      two are prepatory ones to help defining atomic_flags accessors and the
      third one is the actual fix"
    
    * 'for-3.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
      cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags
      sched: add macros to define bitops for task atomic flags
      sched: fix confusing PFA_NO_NEW_PRIVS constant
    6111da34
sched.h 85.5 KB