2.6.12-rc6-mm1

["Martin J. Bligh" <mbligh@mbligh.org>]

Wheeee! it actually compiles and boots for me on x86 ;-)

http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/perf/kernbench.moe.png

Seems to show that perf is rather sucky on kernbench though.

baseline (-rc6) data is here:

http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/4760/kernbench.test/

-mm1 is here:

http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/4876/kernbench.test/

Diffprofile is wacko (HZ seems to be defaulting to 250 in -mm).
If I factor it by 4x, I get:



     47796    10.9% total
     16644    30.5% buffered_rmqueue
     15574     7.7% default_idle
      2229   239.4% kmem_cache_free
      1782    11.1% zap_pte_range
      1752     0.0% inotify_inode_queue_event
      1467    36.3% release_pages
      1281    73.3% set_page_dirty
      1155    12.8% do_wp_page
       924     8.3% _spin_lock
       896     0.0% find_idlest_group
       828    21.7% free_hot_cold_page
       780     0.0% drain_remote_pages
       772     0.0% dput_recursive
       464     0.0% inotify_dentry_parent_queue_event
...
      -412    -8.1% __d_lookup
      -508   -98.4% find_idlest_cpu
      -542   -24.5% do_anonymous_page
      -549   -47.5% current_fs_time
      -580  -100.0% del_timer_sync
      -594   -86.6% dput
      -695   -31.4% __copy_user_intel
     -1461   -13.9% strnlen_user


Buggered if I know what that is from. I'm guessing scheduler, or the
HZ change. I guess I can rerun with the HZ set to 1000 ... you got any
experimental scheduler stuff in your tree?

Else I guess it's some memory allocator stuff maybe?