Messages in this thread | | | Date | Wed, 13 Apr 2005 11:32:01 +1000 | From | Nick Piggin <> | Subject | Re: [patch 6/9] blk: unplug later |
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Andrew Morton wrote: > Nick Piggin <nickpiggin@yahoo.com.au> 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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