Messages in this thread | | | Date | Wed, 09 Jul 2008 13:48:09 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [RFC 00/15] x86_64: Optimize percpu accesses |
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H. Peter Anvin wrote: > Thinking about this some more, I don't know if it would make sense to > put the x86-64 stack canary at the *end* of the percpu area, and > otherwise use negative offsets. That would make sure they were > readily reachable from %rip-based references from within the kernel > text area.
If we can move the canary then a whole pile of options open up. But the problem is that we can't.
J
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