Messages in this thread | | | Date | Fri, 8 Apr 2005 12:02:36 +0200 | From | Jens Axboe <> | Subject | Re: [patch] use cheaper elv_queue_empty when unplug a device |
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On Fri, Apr 08 2005, Nick Piggin wrote: > Jens Axboe wrote: > >On Wed, Mar 30 2005, Nick Piggin wrote: > > >>So Kenneth if you could look into this one as well, to see if > >>it is worthwhile, that would be great. > > > > > >For that to work, you have to change the get_io_context() allocation to > >be GFP_ATOMIC. > > > > Yes of course, thanks for picking that up. > > I guess this isn't a problem, as io contexts should be allocated > comparatively rarely. It would be possible to move it out of the > lock though if we really want to.
Lets just keep it inside the lock, for the fast case it should just be an increment of the already existing io context.
-- Jens Axboe
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