Jens Axboe pointed out that end_request() does not end the entire request. Go figure. On the upside, he wrote the replacement for me! Now we do far less block traffic, and our performance sucks less.
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]> diff -r fdc8cbc1fd61 drivers/block/lguest_blk.c --- a/drivers/block/lguest_blk.c Thu Mar 08 13:35:39 2007 +1100 +++ b/drivers/block/lguest_blk.c Thu Mar 08 15:51:55 2007 +1100 @@ -45,6 +45,16 @@ struct blockdev struct request *req; }; +/* Jens gave me this nice helper to end all chunks of a request. */ +static void end_entire_request(struct request *req, int uptodate) +{ + if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) + BUG(); + add_disk_randomness(req->rq_disk); + blkdev_dequeue_request(req); + end_that_request_last(req, uptodate); +} + static irqreturn_t lgb_irq(int irq, void *_bd) { struct blockdev *bd = _bd; @@ -61,7 +71,7 @@ static irqreturn_t lgb_irq(int irq, void } spin_lock_irqsave(&bd->lock, flags); - end_request(bd->req, bd->lb_page->result == 1); + end_entire_request(bd->req, bd->lb_page->result == 1); bd->req = NULL; bd->dma.used_len = 0; blk_start_queue(bd->disk->queue); @@ -149,7 +159,7 @@ again: pr_debug("Got non-command 0x%08x\n", req->cmd_type); error: req->errors++; - end_request(req, 0); + end_entire_request(req, 0); goto again; } else { if (rq_data_dir(req) == WRITE) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/