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    SubjectRe: [RFC][PATCH 00/16] sched: Core scheduling
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    On 3/10/19 9:23 PM, Aubrey Li wrote:
    > On Sat, Mar 9, 2019 at 3:50 AM Subhra Mazumdar
    > <subhra.mazumdar@oracle.com> wrote:
    >> expected. Most of the performance recovery happens in patch 15 which,
    >> unfortunately, is also the one that introduces the hard lockup.
    >>
    > After applied Subhra's patch, the following is triggered by enabling
    > core sched when a cgroup is
    > under heavy load.
    >
    It seems you are facing some other deadlock where printk is involved.
    Can you
    drop the last patch (patch 16 sched: Debug bits...) and try?

    Thanks,
    Subhra

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