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  1. MariaDB Server
  2. MDEV-12545

Reduce the amount of fil_space_t lookups

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      In InnoDB, fil_system->mutex is one of the most contended mutexes. We should reduce the amount of work done while holding this mutex.
      One such source of work is tablespace lookups.
      During a page flush, we could look up the tablespace only once, in buf_flush_write_block_low(), and pass the fil_space_t* to all functions that need it.

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            Assignee:
            marko Marko Mäkelä
            Reporter:
            marko Marko Mäkelä
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