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Switch workers to system_unbound_wq. #229

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Switch workers to system_unbound_wq. #229

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Commits on Dec 8, 2017

  1. Switch workers to system_unbound_wq. 

    This patch does greatly reduce the probability of
kernel hang caused by memory reclamation executed
through flashcache's code.

The probability is reduced because io required by memory
reclamation can use thread spawned on different cores.

The correct patch would be to create dedicated workqueue
with WQ_MEM_RECLAIM but this patch is relatively unintruisive
and does provably fix the issue in prodiction environments.

Signed-off-by: Bartłomiej Święcki <bartlomiej.swiecki@corp.ovh.com>
    Bartłomiej Święcki committed Dec 8, 2017
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