Thomas Gleixner wrote:

I hit this on boot on an IBM Thinkpad T60p (Intel Core Duo). Haven't had a chance to dig in yet, but wanted to post sooner rather than later.

[ 4.764702] Freeing unused kernel memory: 552k freed [ 4.765205] Write protecting the kernel text: 4552k [ 4.765389] Write protecting the kernel read-only data: 1776k [ 4.766458] BUG: sleeping function called from invalid context at kernel/rtmutex.c:684 [ 4.766596] in_atomic(): 1, irqs_disabled(): 0, pid: 103, name: init [ 4.766723] Pid: 103, comm: init Not tainted 2.6.31-rc4-rt1-dvh01 #1 [ 4.766848] Call Trace: [ 4.766973] [<c012d881>] __might_sleep+0xe1/0x100 [ 4.767099] [<c056ccba>] rt_spin_lock+0x2a/0x70 [ 4.767224] [<c018243a>] res_counter_uncharge+0x2a/0x50 [ 4.767350] [<c01e6e23>] __mem_cgroup_uncharge_common+0x93/0x190 [ 4.767477] [<c01e6fb8>] mem_cgroup_uncharge_page+0x28/0x30 [ 4.767604] [<c01d6b87>] page_remove_rmap+0x47/0x50 [ 4.767728] [<c01cf2d9>] unmap_vmas+0x349/0x6b0 [ 4.767852] [<c01d45e5>] exit_mmap+0xc5/0x1c0 [ 4.767977] [<c037d634>] ? get_random_int+0xb4/0xe0 [ 4.768114] [<c0140481>] mmput+0x51/0xc0 [ 4.768237] [<c01ef651>] flush_old_exec+0x381/0x6c0 [ 4.768361] [<c01ea0c6>] ? vfs_read+0x126/0x190 [ 4.768484] [<c01eea3f>] ? kernel_read+0x3f/0x60 [ 4.768609] [<c02228cb>] load_elf_binary+0x33b/0x18c0 [ 4.768734] [<c012f06f>] ? __wake_up+0x3f/0x50 [ 4.768859] [<c01ccfee>] ? kunmap_high+0x7e/0xb0 [ 4.768983] [<c01ccede>] ? page_address+0x8e/0x90 [ 4.769125] [<c01cd15b>] ? kmap_high+0x13b/0x4c0 [ 4.769248] [<c01d1752>] ? __get_user_pages+0x112/0x3d0 [ 4.769374] [<c012f06f>] ? __wake_up+0x3f/0x50 [ 4.769498] [<c056cd9a>] ? __rt_spin_lock+0x2a/0x70 [ 4.769623] [<c0222590>] ? load_elf_binary+0x0/0x18c0 [ 4.769747] [<c01eedbd>] search_binary_handler+0xfd/0x300 [ 4.769872] [<c01f0568>] do_execve+0x228/0x300 [ 4.769996] [<c0319626>] ? strncpy_from_user+0x46/0x70 [ 4.770121] [<c0101b16>] sys_execve+0x36/0x60 [ 4.770244] [<c0103025>] syscall_call+0x7/0xb