Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: GGI Project Unhappy On Linux | Date | 28 Mar 1998 10:29:01 GMT |
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Followup to: <Pine.LNX.3.95.980328101434.19294B-100000@ferret.lmh.ox.ac.uk> By author: Matthew Kirkwood <weejock@ferret.lmh.ox.ac.uk> In newsgroup: linux.dev.kernel > > > > > A process running at ring 0 can still disable interrupts, DMA into > > > kernel memory, etc... > > > > But the Xserver isn't running in the kernel mode. > > I may have missed something, but the difference between iopl 3 and "kernel > mode" is...? >
Huge. IOPL 3 is just user mode with full access to the hardware, but not, for example, to kernel memory.
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