Comment 281 for bug 500069

(In reply to comment #105)

I have tried the patch with 2.6.28.2 and 2.6.29-rc3 and always get a crash, when io start. Sometimes even after the X-server has started.

kernel 2.6.29-rc3 at

cfq_remove_request 0xe3/0x251

0xffffffff811ca8fc is in cfq_remove_request (block/cfq-iosched.c:650).
645 {
646 struct cfq_queue *cfqq = RQ_CFQQ(rq);
647 struct cfq_data *cfqd = cfqq->cfqd;
648 const int sync = rq_is_sync(rq);
649
650 BUG_ON(!cfqq->queued[sync]);
651 cfqq->queued[sync]--;
652
653 elv_rb_del(&cfqq->sort_list, rq);
654

kernel 2.6.28.2
elv_rb_del+0x21/0x4b

394 }
395 EXPORT_SYMBOL(elv_rb_add);
396
397 void elv_rb_del(struct rb_root *root, struct request *rq)
398 {
399 BUG_ON(RB_EMPTY_NODE(&rq->rb_node));
400 rb_erase(&rq->rb_node, root);
401 RB_CLEAR_NODE(&rq->rb_node);
402 }
403 EXPORT_SYMBOL(elv_rb_del);