Messages in this thread | | | Date | Sun, 22 Aug 2004 19:31:28 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] context-switching overhead in X, ioport(), 2.6.8.1 |
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* Andi Kleen <ak@muc.de> wrote:
> > Xorg and XFree assume the kernel will have intelligent limits. When the > > range went up the EnableIO code in turn switched to ioperm. > > Which was the wrong thing to do since it is slower.
it is not significantly slower with older kernels or with the patch applied, and it's safer than an all-ports iopl(3).
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