• Tejun Heo's avatar
    fscache: convert operation to use workqueue instead of slow-work · 8af7c124
    Tejun Heo authored
    Make fscache operation to use only workqueue instead of combination of
    workqueue and slow-work.  FSCACHE_OP_SLOW is dropped and
    FSCACHE_OP_FAST is renamed to FSCACHE_OP_ASYNC and uses newly added
    fscache_op_wq workqueue to execute op->processor().
    fscache_operation_init_slow() is dropped and fscache_operation_init()
    now takes @processor argument directly.
    
    * Unbound workqueue is used.
    
    * fscache_retrieval_work() is no longer necessary as OP_ASYNC now does
      the equivalent thing.
    
    * sysctl fscache.operation_max_active added to control concurrency.
      The default value is nr_cpus clamped between 2 and
      WQ_UNBOUND_MAX_ACTIVE.
    
    * debugfs support is dropped for now.  Tracing API based debug
      facility is planned to be added.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarDavid Howells <dhowells@redhat.com>
    8af7c124
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