On Thu, 18 August 2005 12:01:52 +0200, Folkert van Heusden wrote: > > What about a zero-copy read-interface? > An ioctl (or something) which enables the kernel to do dma directly to > the userspace. Of course this should be limited to the root-user or a > user with special capabilities (rights) since if a drive screws up, data > from a different sector (or so) might end up in the proces' memory. Of > course copying a sector from kernel- to userspace can be done pretty > fast but i.m.h.o. all possible speedimprovements should be made unless > unclean.
Just use mmap(). Unlike your proposal, it cooperates with the page cache. Jörn -- Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats. -- Howard Aiken quoted by Ken Iverson quoted by Jim Horning quoted by Raph Levien, 1979 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
