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On Mar 23, 2007, at 19:26:34, Jan Engelhardt wrote: > here's one. Allocates all the fluff dynamically. It does not create > any dev nodes by itself, so you need to do it (à la mdadm), but > you'll get all 1048576 available minors. > > +static LIST_HEAD(loop_devices); Maybe an rbtree would work better here? Maximum number of nodes traversed to get to the bottom of the tree given 2^(20) loop devices is 19 as opposed to the 2^(20) for a linked list. Also, to preserve compatibility with existing userspace loop tools you should probably always allocate one extra loop device. Keep a "highest used loopdev" number and create the one after that so that udev will autocreate a dev node for it. Cheers, Kyle Moffett - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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