Messages in this thread | | | Date | Thu, 07 Aug 2003 19:26:34 +1000 | From | Nick Piggin <> | Subject | Re: queue reference counting |
| |
Jens Axboe wrote:
>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. >
Sounds sensible. Just ensuring I wasn't missing out on the fun.
- 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/
| |