Thursday, 12 November 2015

BFS 465, linux-4.3-ck1

Finally a resync to mainline linux, with linux-4.3.

BFS by itself:

4.3-sched-bfs-465.patch

-ck branded linux-4.3-ck1 patches:

4.3-ck1 patches

In addition to the usual collection of resyncs and minor updates, this includes 3 patches courtesy of Alfred Chen who maintained the fort while I was too busy to work on a resync for linux-4.2. (THANKS!) His changes fix a warning that happens on some system on startup, hopefully fix the long standing hang on heavy file access with truly unlocked block flush unplugging, and a build problem.

With such a large resync and update, the usual warnings apply regarding instability, file system corruption and unwanted impregnations.

EDIT: Build fix: bfs465-nohz-buildfix.patch

Enjoy!
お楽しみください
at

9 comments:

  1. graysky13 November 2015 at 10:05

    Thanks CK! Booted into linux-ck 4.3.0-1 just fine and seems to be running smoothly.

    ReplyDelete
  2. ooo13 November 2015 at 10:27

    thanks for the update. running fine so far, and no crashes with btrfs scrub or torrents.

    ReplyDelete
  3. jwh715 November 2015 at 01:41

    Thanks ck! SMP built fine, but building UP fails due to:
    kernel/sched/bfs.c:2684:6: error: redefinition of ‘update_cpu_load_nohz’
    void update_cpu_load_nohz(void)
    ^
    In file included from include/linux/nmi.h:7:0,
    from kernel/sched/bfs.c:33:
    include/linux/sched.h:182:20: note: previous definition of ‘update_cpu_load_nohz’ was here
    static inline void update_cpu_load_nohz(void) { }
    ^
    scripts/Makefile.build:258: recipe for target 'kernel/sched/bfs.o' failed

    This is the cause:

    /linux/sched.h
    -----------------
    #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
    extern void update_cpu_load_nohz(void);
    #else
    static inline void update_cpu_load_nohz(void) { }
    #endif

    Here is the bfs definition:

    kernel/sched/bfs.c
    -----------------
    #ifdef CONFIG_NO_HZ_COMMON
    void update_cpu_load_nohz(void)
    {
    }

    void calc_load_enter_idle(void)
    {
    }

    void calc_load_exit_idle(void)
    {
    }
    #endif /* CONFIG_NO_HZ_COMMON */

    ReplyDelete
    Replies
    1. Alfred Chen15 November 2015 at 14:12

      update_cpu_load_nohz() should be surround by CONFIG_SMP, the code looks like

      3 #ifdef CONFIG_NO_HZ_COMMON
      2
      1 #ifdef CONFIG_SMP
      3094 void update_cpu_load_nohz(void)
      1 {
      2 }
      3 #endif
      4
      5 void calc_load_enter_idle(void)
      6 {
      7 }
      8

      Delete
    2. jwh716 November 2015 at 14:01

      Thanks AC; built and running uniprocessor on the ol' netbook now. :)

      Delete
    3. Peter Ganzhorn20 November 2015 at 23:56

      Basend on ck's initial patch and Alfred Chens additional info, here's a link to an updated patch by me:

      https://www.dropbox.com/s/qwtefl2spnmwxqi/bfs465-nohz-buildfix-pgzh.patch?dl=0

      Delete
  4. Mike24 November 2015 at 22:18

    Hi Con,

    thanks for the new BFS. IS working fine here.
    Imho the best BFS since long time, heavy IO isn't a problem and idle top values are again under 0,10 and not on > 0,5.

    So again, thanks for your work and keep it on.
    Regards sysitos

    ReplyDelete
  5. Anonymous23 January 2016 at 02:49

    Any word on making bfs work with 4.4.0?

    It seems the whole scheduler (core.c) stuff has changed since 4.3

    ReplyDelete
  6. SewShop18 April 2016 at 20:59

    Hi, I have this problem when do pacman -Syu it give me:
    virtualbox-ck-host-modules-ivy bridge: installing linux-ck-ivy bridge (4.4.7-1) interrupts addiction 'linux-ck-ivybridge <4.4'
    I uninstalled all virtualbox package but same result. Thanks

    ReplyDelete