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xen-devel
Re: [Xen-devel] Help/problems with blktap on xen-unstable
Roland Paterson-Jones wrote:
So, I guess I need to recompile with an alternate device major number.
I can find the following refs to 254 in the source (some are dups):
./linux-2.6.16.13-xen0/drivers/xen/blktap/blktap.c:
major=254, minor numbers begin at 0 */
./linux-2.6.16.13-xen0/drivers/xen/blktap/blktap.c:#define
BLKTAP_DEV_MAJOR 254 /* TODO: Make major number dynamic *
./linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c:
major=254, minor numbers begin at 0 */
./linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c:#define
BLKTAP_DEV_MAJOR 254 /* TODO: Make major number dynamic *
./tools/blktap/lib/blktaplib.h:#define BLKTAP_DEV_MAJOR 254
./tools/blktap/drivers/blktapctrl.c: make_blktap_dev(devname,254,0);
./tools/blktap_user/aiotools/blktapctrl.c:
make_blktap_dev(devname,254,0);
./tools/blktap_user/blktaplib.h:#define BLKTAP_DEV_MAJOR 254
I'm guessing it would be good to have one definition, but I'm not too
familiar with the code structure. Can a .h file span kernel and user
source? Also, any idea what is meant by making major number 'dynamic' -
are they proposing walking the major numbers in code until successful,
or just a config option somewhere (where?).
Regards
Roland
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