Question about the buffer cache

[Anonymous]

The buffer-head structure has a wait queue for processes blocked on it: 
    struct wait_queue * b_wait;
If 2 processes want read-only access we could wake up the both of them.
(This is only useful on SMP systems, i think).
This is already done in 2.2/2.3? This can be done? 

  - Marcelo

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