• Frederic Weisbecker's avatar
    context_tracking: New context tracking susbsystem · 91d1aa43
    Frederic Weisbecker authored
    
    
    Create a new subsystem that probes on kernel boundaries
    to keep track of the transitions between level contexts
    with two basic initial contexts: user or kernel.
    
    This is an abstraction of some RCU code that use such tracking
    to implement its userspace extended quiescent state.
    
    We need to pull this up from RCU into this new level of indirection
    because this tracking is also going to be used to implement an "on
    demand" generic virtual cputime accounting. A necessary step to
    shutdown the tick while still accounting the cputime.
    Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Li Zhong <zhong@linux.vnet.ibm.com>
    Cc: Gilad Ben-Yossef <gilad@benyossef.com>
    Reviewed-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    [ paulmck: fix whitespace error and email address. ]
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    91d1aa43
fault.c 29.5 KB