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    SubjectRe: [ANNOUNCE] 3.2-rc1-rt2
    On Tue, Nov 15, 2011 at 04:40:59PM +0800, Yong Zhang wrote:
    > Got below warning:
    >
    > [ 8.459702] BUG: sleeping function called from invalid context at linux/kernel/rtmutex.c:645
    > [ 8.459705] in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper/0
    > [ 8.459707] 1 lock held by swapper/0/1:
    > [ 8.459708] #0: (&sig->cred_guard_mutex){+.+.+.}, at: [<ffffffff81154c45>] prepare_bprm_creds+0x35/0x80
    > [ 8.459717] Pid: 1, comm: swapper/0 Not tainted 3.2.0-rc1-rt2-11311-g3c4c0e7-dirty #10
    > [ 8.459718] Call Trace:

    I'm hitting the same issue. Here's the trace:

    [ 0.915638] BUG: sleeping function called from invalid context at /home/luis.henriques/git-trees/linux-2.6/kernel/rtmutex.c:645
    [ 0.915641] in_atomic(): 1, irqs_disabled(): 0, pid: 33, name: busybox
    [ 0.915642] 1 lock held by busybox/33:
    [ 0.915643] #0: (&mm->page_table_lock){+.+...}, at: [<ffffffff81119ec3>] unmap_vmas+0x333/0x6d0
    [ 0.915664] Pid: 33, comm: busybox Not tainted 3.2.0-rc1-rt2+ #1
    [ 0.915665] Call Trace:
    [ 0.915674] [<ffffffff810497ba>] __might_sleep+0x12a/0x1e0
    [ 0.915687] [<ffffffff81300f74>] rt_spin_lock+0x24/0x60
    [ 0.915692] [<ffffffff8113efcd>] memcg_check_events.clone.33+0x14d/0x250
    [ 0.915696] [<ffffffff8113f1bf>] __mem_cgroup_uncharge_common+0xef/0x270
    [ 0.915698] [<ffffffff8114311f>] mem_cgroup_uncharge_page+0x2f/0x40
    [ 0.915701] [<ffffffff81125410>] page_remove_rmap+0x70/0x90
    [ 0.915703] [<ffffffff81119fbf>] unmap_vmas+0x42f/0x6d0
    [ 0.915705] [<ffffffff811229d9>] exit_mmap+0xa9/0x120
    [ 0.915710] [<ffffffff8104b9e0>] mmput+0x50/0x100
    [ 0.915713] [<ffffffff81052c5b>] exit_mm+0x11b/0x140
    [ 0.915718] [<ffffffff8109cb6d>] ? acct_collect+0x17d/0x1c0
    [ 0.915720] [<ffffffff81053518>] do_exit+0x678/0x930
    [ 0.915722] [<ffffffff8130224e>] ? retint_swapgs+0xe/0x13
    [ 0.915724] [<ffffffff81053881>] do_group_exit+0x61/0xe0
    [ 0.915726] [<ffffffff81053917>] sys_exit_group+0x17/0x20
    [ 0.915728] [<ffffffff81302aeb>] system_call_fastpath+0x16/0x1b

    Cheers,
    --
    Luis Henriques


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