Xen devel - Jun 2009 - How to switch to debug mode to compile xen ?

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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I don''t think there is a config option to turn it on. Add:
EXTRA_CFLAGS := -DDEBUG
To drivers/xen/blkfront/Makefile and rebuild

 -- Keir

On 02/06/2009 08:17, "张树坤" <bitzsk@gmail.com> wrote:
> 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!


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Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel