Messages in this thread | | | Date | Sun, 16 Nov 2008 00:12:37 +0000 | From | Alan Cox <> | Subject | Re: [PATCH 2/2] Add dev.mem.restricted sysctl |
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> Well, I think that option makes sense to protect the system > from processes that *accidentally* read/write to the wrong memory > location (like the X server that always runs as root).
Older X drivers very carefully only map the memory they need. They also unmap and remap as well as using iopl/ioperm ranges to avoid such accidents. Newer ones are all DMA command chains and stuff so it won't make one iota of difference.
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