Q: assumptions on make_request() and request_fn()

What are the assumtions for calling make_request() or the request_fn()?

Interrupt context or process context or both?

(2.4/2.5)

Thanks,

Luben

make_request_fn() is called from process context, no locks held. It often sleeps.

request_fn() is called with (2.4: io_request_lock, 2.5: q->queue_lock) held, and interrupts disabled. The context _may_ be process, it may also be from an interrupt handler for requeueing etc.

Jens Axboe