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    SubjectRe: [PATCH v4] sched/numa: fix unsafe get_task_struct() in task_numa_assign()
    On Mon, Nov 10, 2014 at 11:09:29AM -0500, Sasha Levin wrote:
    > On 11/10/2014 11:03 AM, Peter Zijlstra wrote:
    > > On Fri, Nov 07, 2014 at 10:48:27PM -0500, Sasha Levin wrote:
    > >> [ 829.539183] BUG: spinlock recursion on CPU#10, trinity-c594/11067
    > >> [ 829.539203] lock: 0xffff880631dd6b80, .magic: dead4ead, .owner: trinity-c594/11067, .owner_cpu: 13
    > >
    > > Ooh, look at that. CPU#10 vs .owner_cpu: 13 on the _same_ task.
    > >
    > > One of those again :/
    >
    > Hum. I missed that one.
    >
    > Hold on, but the magic here is fine and the owner pointer is fine, why would just the owner cpu
    > be wrong?

    I've no clue, but I've seen them before. Complete mystery that.


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