Re: [patch 6/9] blk: unplug later

[Nick Piggin]

Andrew Morton wrote:
> Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
>
> > get_request_wait needn't unplug the device immediately.
>
>
> Probably.  But what if the get_request(q, rw, GFP_NOIO); did
> some sleeping?

It can't sleep unless it returns the request, because it
is using mempool allocs. So any time it returns NULL, it
hasn't slept.

But Jens would have a better idea of the correct behaviour.
Jens, what do you think?

--
SUSE Labs, Novell Inc.

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