[Xen-devel] How to switch to debug mode to compile xen ?

[张树坤 <bitzsk@xxxxxxxxx>]

hi, 

    DPRINTK("do_blk_req %p: cmd %p, sec %llx, "
            "(%u/%li) buffer:%p [%s]\n",
            req, req->cmd, (long long)req->sector,
            req->current_nr_sectors,

            req->nr_sectors, req->buffer,
            rq_data_dir(req) ? "write" : "read");

this statement is located in the blkfront.c file ,in the  do_blkif_request(request_queue_t *rq)  function. i know DPRINTK is used for debug only. if i want to see the DPRINTK message , how could i do? that's how to open the debug mode to compile xen source code? Thanks!

-- 
Best regards,
张树坤
北京理工大学，计算机科学技术学院
Sucan
Computer Department,Beijing Institute of Technology,China
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