-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, May 21, 2007 at 07:46:39AM +0900, Seongsu Lee wrote: > I am playing with block devices but I need help. > > [1] > I want to override the do_hd_requrst() of a user-specified > hard disk. For the work, I want to iterate in 'gendisk's > without modifying the current source. (ex: hd.c) > 'struct gendisk' is static variables and I have no idea > to access it. So you want to change something without having to change something. Sounds a bit impossible to me. > How can I override the request function of a gendisk? Why do you want to override it in the first place? What is the goal? Maybe there are much better ways to achieve what you try to do. > [2] > Is it right that the Linux use only one request queue for > all the IDE/ATA-based block devices? > I looked hd_init() in drivers/ide/lagacy/hd.c and found > that a single request queue, hd_queue is used for all the > devices. Am I right? For the legacy devices maybe, yeah. Note that the legacy driver is almost never used unless you have a very old 386 system with MFM drives or so. Anything slightly more modern uses the non-legacy IDE drivers or the libata SATA/PATA drivers which use a request queue per device. Erik - -- They're all fools. Don't worry. Darwin may be slow, but he'll eventually get them. -- Matthew Lammers in alt.sysadmin.recovery -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGUW7B/PlVHJtIto0RAqrRAJ0UpZIi4UTavtWrT7fsundAlWYHcgCfffDg Zx56NkiAvtmxRRdY6C2gsBI= =Nfn4 -----END PGP SIGNATURE----- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
