On Sat, Jul 23, 2011 at 05:13:30PM +0200, Thomas Gleixner wrote:

Dear RT Folks,

I'm pleased to announce the 3.0-rt2 release.

Changes versus 3.0-rt1:

  * mqueue fix (Yoshitake Kobayashi)

  * dca locking fix (Mike Galbraith)

  * trace updates (Carsten Emde)

  * Fixed vprintk wreckage and rcutorture (tglx)

Known issues:

  * Some weird "console=..." commandline + config dependent
    interactions which have been not yet investigated down to their
    root cause. Result in a boot hang. YMMV

Patch against 3.0 can be found here:

  http://www.kernel.org/pub/linux/kernel/projects/rt/patch-3.0-rt2.patch.bz2

The split quilt queue is available at:

  http://www.kernel.org/pub/linux/kernel/projects/rt/patches-3.0-rt2.tar.bz2

I get below bug on my notebook:

[ 1244.912596] BUG: sleeping function called from invalid context at kernel/rtmutex.c:645
[ 1244.912599] in_atomic(): 1, irqs_disabled(): 0, pid: 1713, name: chromium-browse
[ 1244.912603] Pid: 1713, comm: chromium-browse Not tainted 3.0.0-rt2-00236-g4cf2acd #59
[ 1244.912605] Call Trace:
[ 1244.912613]  [<c15cee54>] ? printk+0x1d/0x21
[ 1244.912618]  [<c1036086>] __might_sleep+0xe6/0x110
[ 1244.912621]  [<c15d151c>] rt_spin_lock+0x1c/0x40
[ 1244.912626]  [<c111f763>] mem_cgroup_split_huge_fixup+0x43/0xd0
[ 1244.912629]  [<c11195d8>] split_huge_page+0x208/0x770
[ 1244.912632]  [<c15d1a25>] ? _raw_spin_lock+0x15/0x30
[ 1244.912635]  [<c1040362>] ? migrate_enable+0xc2/0x130
[ 1244.912638]  [<c111a20b>] __split_huge_page_pmd+0x7b/0xc0
[ 1244.912641]  [<c10fadb5>] unmap_vmas+0x5a5/0x620
[ 1244.912645]  [<c10e5e73>] ? lru_add_drain+0xe3/0x1d0
[ 1244.912648]  [<c10faeaa>] zap_page_range+0x7a/0xa0
[ 1244.912651]  [<c15d0d5f>] ? rt_mutex_lock+0x1f/0x50
[ 1244.912653]  [<c10f81a4>] sys_madvise+0x294/0x5f0
[ 1244.912656]  [<c10fe520>] ? remove_vma+0x50/0x70
[ 1244.912660]  [<c15d7ddf>] sysenter_do_call+0x12/0x2d

And kernel config is attached.

Thanks,
Yong