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xen-blkfront: fix accounting of reqs when migrating
Current migration code uses blk_put_request in order to finish a request before requeuing it. This function doesn't update the statistics of the queue, which completely screws accounting. Use blk_end_request_all instead which properly updates the statistics of the queue. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reported-and-Tested-by: Ouyang Zhaowei (Charles) <ouyangzhaowei@huawei.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: xen-devel@lists.xenproject.org
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@ -1511,7 +1511,7 @@ static int blkif_recover(struct blkfront_info *info)
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merge_bio.tail = copy[i].request->biotail;
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bio_list_merge(&bio_list, &merge_bio);
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copy[i].request->bio = NULL;
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blk_put_request(copy[i].request);
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blk_end_request_all(copy[i].request, 0);
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}
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kfree(copy);
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@ -1534,7 +1534,7 @@ static int blkif_recover(struct blkfront_info *info)
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req->bio = NULL;
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if (req->cmd_flags & (REQ_FLUSH | REQ_FUA))
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pr_alert("diskcache flush request found!\n");
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__blk_put_request(info->rq, req);
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__blk_end_request_all(req, 0);
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}
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spin_unlock_irq(&info->io_lock);
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