On Wed, Nov 29 2000, schwidefsky@de.ibm.com wrote:
> request queue to put them on its internal queue. You could argue
> that it shouldn't dequeue request if q->plugged == 1. On the other
> hand why not, before the disk has nothing to do. Anyway the result
I agree with your reasoning, even if the s390 behaviour is a bit
"non-standard" wrt block devices. Linus, could you apply?
--- drivers/block/ll_rw_blk.c~ Wed Nov 29 15:17:33 2000
+++ drivers/block/ll_rw_blk.c Wed Nov 29 15:18:43 2000
@@ -347,10 +347,9 @@
*/
static inline void __generic_unplug_device(request_queue_t *q)
{
- if (!list_empty(&q->queue_head)) {
- q->plugged = 0;
+ q->plugged = 0;
+ if (!list_empty(&q->queue_head))
q->request_fn(q);
- }
}
static void generic_unplug_device(void *data)
-- * Jens Axboe <axboe@suse.de> * SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Nov 30 2000 - 21:00:22 EST