Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 7 Aug 2003 11:22:37 +0200 | From | Jens Axboe <> | Subject | Re: queue reference counting |
| |
On Thu, Aug 07 2003, Nick Piggin wrote: > > > Jens Axboe wrote: > > >On Thu, Aug 07 2003, Pavel Machek wrote: > > > >>Hi! > >> > >> > >>>I ported `subj` to 2.6.0-test2. I do not yet have idea if it works, > >>>but it compiles ;-). > >>> > >>It compiles, it event boots, but it does not seem to have much effect > >>:-(. > >> > > > >Now that the queue reference counting is in the current bk tree, we are > >that much closer to real modular io schedulers. I'll post the cfq with > >priorities for that. > > > > OK, the QUEUE_FLAG_DEAD. I assume that will be set in blk_cleanup_queue? > Then all remaining requests are flushed out of the queue? > > This requires that a driver must be able to continue to process requests > during the call to blk_cleanup_queue, and that blk_cleanup_queue might > block, right? Is this acceptable, or should there be an earlier call to > set QUEUE_FLAG_DEAD and ensure queue is flushed?
The plan was to add blk_shutdown_queue() to do this. And then make sure AS checks the dead flag and doesn't hold back any requests.
-- Jens Axboe
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| ![\](/images/icornerr.gif) |