>I've checked the code, it seems that contention is impossible:
>The lock is only acquired in 'end_io_async()', and that
>function is usually called from 'end_that_request_first'
>which must be called with the io_request_lock acquired.
Hmm, good point. I'll remove the per-page spinlock. I'll produce a new
buffer-2.2.9-L patch now. Thanks.
Andrea Arcangeli
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