[SCM] GNU Mach branch, master, updated. v1.4-518-g739421a

[Justus Winter]

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- Log -----------------------------------------------------------------
commit 739421ac52472d8dd2f23c141d449ff112fbf9b6
Author: Justus Winter <address@hidden>
Date:   Tue Sep 30 09:08:44 2014 +0200

    kern: reduce the size of `struct thread'
    
    Reduce the size of `struct thread' by twelve bytes making it fit into
    exactly five cache lines (on 32-bit platforms).
    
    * kern/thread.h (struct thread): Group the state and all flags in a
    bitfield.
    (TH_EV_WAKE_ACTIVE, TH_EV_STATE): Provide macros that generate keys
    for synchronization primitives like `thread_wakeup'.
    * kern/thread.c (thread_halt, thread_dowait, thread_suspend): Use the
    new keys instead of addresses of fields for the synchronisation.
    * kern/ipc_sched.c (thread_handoff): Likewise.
    * kern/sched_prim.c (thread_invoke, thread_dispatch): Likewise.

commit b0fa32c1d7de74a8b83b33833640ff30c84e9fbd
Author: Justus Winter <address@hidden>
Date:   Wed Feb 18 06:40:07 2015 +0100

    kern: avoid #if 0ing out thread_collect_scan
    
    Currently, `thread_collect_scan' does nothing because `pcb_collect' is
    a nop.  Its body is exempt from compilation by means of the
    preprocessor.
    
    This is unfortunate as it increases the risk of bitrot, and we still
    need to pay the price of rate-limiting thread_collect_scan.
    
    * kern/thread.c (thread_collect_scan): Drop #if 0 around the body.
    * vm/vm_pageout.c (vm_pageout_scan): Do not call
    `consider_thread_collect' and document why.

-----------------------------------------------------------------------

Summary of changes:
 kern/ipc_sched.c  |    2 +-
 kern/sched_prim.c |   10 +++++-----
 kern/thread.c     |   14 ++++++--------
 kern/thread.h     |   27 +++++++++++++++++++++++----
 vm/vm_pageout.c   |    2 ++
 5 files changed, 37 insertions(+), 18 deletions(-)


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